Mercurial > hg > nginx-site
annotate xml/en/docs/mail/ngx_mail_ssl_module.xml @ 1695:aa95174efa80
Moved levels from error_log syntax to description.
author | Maxim Dounin <mdounin@mdounin.ru> |
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date | Wed, 04 May 2016 17:35:39 +0300 |
parents | e3d3e2ed4275 |
children | 6f5497797cde |
rev | line source |
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1 <?xml version="1.0"?> |
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2 |
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3 <!-- |
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4 Copyright (C) 2006, 2007 Anton Yuzhaninov |
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5 Copyright (C) Nginx, Inc. |
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6 --> |
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7 |
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8 <!DOCTYPE module SYSTEM "../../../../dtd/module.dtd"> |
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9 |
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10 <module name="Module ngx_mail_ssl_module" |
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11 link="/en/docs/mail/ngx_mail_ssl_module.html" |
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12 lang="en" |
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13 rev="8"> |
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14 |
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15 <section id="summary"> |
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16 |
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17 <para> |
966 | 18 The <literal>ngx_mail_ssl_module</literal> module provides the necessary |
19 support for a mail proxy server to work with the SSL/TLS protocol. | |
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20 </para> |
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21 |
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22 <para> |
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23 This module is not built by default, it should be enabled with |
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24 the <literal>--with-mail_ssl_module</literal> |
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25 configuration parameter. |
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26 <note> |
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27 This module requires the <link url="http://www.openssl.org">OpenSSL</link> |
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28 library. |
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29 </note> |
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30 </para> |
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31 |
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32 </section> |
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33 |
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34 |
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35 <section id="example" name="Example Configuration"> |
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36 |
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37 <para> |
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38 To reduce the processor load, it is recommended to |
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39 <list type="bullet"> |
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40 |
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41 <listitem> |
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42 set the number of worker processes equal to the number of processors, |
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43 </listitem> |
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44 |
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45 <listitem> |
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46 enable the shared session cache, |
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47 </listitem> |
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48 |
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49 <listitem> |
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50 disable the built-in session cache, |
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51 </listitem> |
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52 |
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53 <listitem> |
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54 and possibly increase the session lifetime (by default, 5 minutes): |
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55 </listitem> |
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56 |
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57 </list> |
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58 |
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59 <example> |
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60 <emphasis>worker_processes auto;</emphasis> |
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61 |
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62 mail { |
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63 |
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64 ... |
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65 |
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66 server { |
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67 listen 993 ssl; |
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68 |
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69 ssl_protocols TLSv1 TLSv1.1 TLSv1.2; |
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70 ssl_ciphers AES128-SHA:AES256-SHA:RC4-SHA:DES-CBC3-SHA:RC4-MD5; |
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71 ssl_certificate /usr/local/nginx/conf/cert.pem; |
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72 ssl_certificate_key /usr/local/nginx/conf/cert.key; |
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73 <emphasis>ssl_session_cache shared:SSL:10m;</emphasis> |
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74 <emphasis>ssl_session_timeout 10m;</emphasis> |
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75 |
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76 ... |
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77 } |
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78 </example> |
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79 </para> |
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80 |
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81 </section> |
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82 |
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83 |
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84 <section id="directives" name="Directives"> |
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85 |
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86 <directive name="ssl"> |
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87 <syntax><literal>on</literal> | <literal>off</literal></syntax> |
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88 <default>off</default> |
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89 <context>mail</context> |
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90 <context>server</context> |
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91 |
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92 <para> |
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93 Enables the SSL/TLS protocol for the given server. |
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94 </para> |
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95 |
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96 </directive> |
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97 |
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98 |
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99 <directive name="ssl_certificate"> |
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100 <syntax><value>file</value></syntax> |
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101 <default/> |
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102 <context>mail</context> |
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103 <context>server</context> |
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104 |
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105 <para> |
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106 Specifies a <value>file</value> with the certificate in the PEM format |
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107 for the given server. |
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108 If intermediate certificates should be specified in addition to a primary |
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109 certificate, they should be specified in the same file in the following |
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110 order: the primary certificate comes first, then the intermediate certificates. |
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111 A secret key in the PEM format may be placed in the same file. |
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112 </para> |
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113 |
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114 </directive> |
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115 |
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116 |
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117 <directive name="ssl_certificate_key"> |
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118 <syntax><value>file</value></syntax> |
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119 <default/> |
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120 <context>mail</context> |
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121 <context>server</context> |
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122 |
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123 <para> |
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124 Specifies a <value>file</value> with the secret key in the PEM format |
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125 for the given server. |
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126 </para> |
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127 |
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128 <para> |
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129 The value |
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130 <literal>engine</literal>:<value>name</value>:<value>id</value> |
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131 can be specified instead of the <value>file</value> (1.7.9), |
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132 which loads a secret key with a specified <value>id</value> |
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133 from the OpenSSL engine <value>name</value>. |
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134 </para> |
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135 |
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136 </directive> |
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137 |
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138 |
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139 <directive name="ssl_ciphers"> |
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140 <syntax><value>ciphers</value></syntax> |
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141 <default>HIGH:!aNULL:!MD5</default> |
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142 <context>mail</context> |
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143 <context>server</context> |
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144 |
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145 <para> |
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146 Specifies the enabled ciphers. |
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147 The ciphers are specified in the format understood by the |
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148 OpenSSL library, for example: |
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149 <example> |
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150 ssl_ciphers ALL:!aNULL:!EXPORT56:RC4+RSA:+HIGH:+MEDIUM:+LOW:+SSLv2:+EXP; |
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151 </example> |
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152 </para> |
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153 |
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154 <para> |
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155 The full list can be viewed using the |
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156 “<command>openssl ciphers</command>” command. |
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157 </para> |
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158 |
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159 <para> |
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160 <note> |
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161 The previous versions of nginx used |
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162 <link doc="../http/configuring_https_servers.xml" id="compatibility">different</link> |
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163 ciphers by default. |
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164 </note> |
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165 </para> |
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166 |
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167 </directive> |
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168 |
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169 |
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170 <directive name="ssl_client_certificate"> |
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171 <syntax><value>file</value></syntax> |
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172 <default/> |
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173 <context>mail</context> |
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174 <context>server</context> |
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175 <appeared-in>1.7.11</appeared-in> |
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176 |
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177 <para> |
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178 Specifies a <value>file</value> with trusted CA certificates in the PEM format |
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179 used to <link id="ssl_verify_client">verify</link> client certificates. |
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180 </para> |
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181 |
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182 <para> |
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183 The list of certificates will be sent to clients. |
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184 If this is not desired, the <link id="ssl_trusted_certificate"/> |
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185 directive can be used. |
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186 </para> |
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187 |
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188 </directive> |
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189 |
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190 |
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191 <directive name="ssl_crl"> |
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192 <syntax><value>file</value></syntax> |
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193 <default/> |
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194 <context>mail</context> |
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195 <context>server</context> |
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196 <appeared-in>1.7.11</appeared-in> |
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197 |
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198 <para> |
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199 Specifies a <value>file</value> with revoked certificates (CRL) |
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200 in the PEM format used to <link id="ssl_verify_client">verify</link> |
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201 client certificates. |
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202 </para> |
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203 |
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204 </directive> |
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205 |
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206 |
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207 <directive name="ssl_dhparam"> |
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208 <syntax><value>file</value></syntax> |
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209 <default/> |
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210 <context>mail</context> |
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211 <context>server</context> |
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212 <appeared-in>0.7.2</appeared-in> |
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213 |
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214 <para> |
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215 Specifies a <value>file</value> with DH parameters for EDH ciphers. |
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216 </para> |
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217 |
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218 </directive> |
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219 |
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220 |
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221 <directive name="ssl_ecdh_curve"> |
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222 <syntax><value>curve</value></syntax> |
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223 <default>prime256v1</default> |
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224 <context>mail</context> |
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225 <context>server</context> |
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226 <appeared-in>1.1.0</appeared-in> |
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227 <appeared-in>1.0.6</appeared-in> |
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228 |
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229 <para> |
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230 Specifies a <value>curve</value> for ECDHE ciphers. |
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231 </para> |
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232 |
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233 </directive> |
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234 |
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235 |
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236 <directive name="ssl_password_file"> |
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237 <syntax><value>file</value></syntax> |
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238 <default/> |
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239 <context>mail</context> |
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240 <context>server</context> |
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241 <appeared-in>1.7.3</appeared-in> |
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242 |
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243 <para> |
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244 Specifies a <value>file</value> with passphrases for |
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245 <link id="ssl_certificate_key">secret keys</link> |
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246 where each passphrase is specified on a separate line. |
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247 Passphrases are tried in turn when loading the key. |
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248 </para> |
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249 |
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250 <para> |
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251 Example: |
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252 <example> |
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253 mail { |
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254 ssl_password_file /etc/keys/global.pass; |
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255 ... |
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256 |
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257 server { |
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258 server_name mail1.example.com; |
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259 ssl_certificate_key /etc/keys/first.key; |
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260 } |
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261 |
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262 server { |
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263 server_name mail2.example.com; |
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264 |
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265 # named pipe can also be used instead of a file |
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266 ssl_password_file /etc/keys/fifo; |
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267 ssl_certificate_key /etc/keys/second.key; |
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268 } |
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269 } |
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270 </example> |
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271 </para> |
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272 |
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273 </directive> |
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274 |
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275 |
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276 <directive name="ssl_prefer_server_ciphers"> |
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277 <syntax><literal>on</literal> | <literal>off</literal></syntax> |
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278 <default>off</default> |
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279 <context>mail</context> |
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280 <context>server</context> |
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281 |
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282 <para> |
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283 Specifies that server ciphers should be preferred over client ciphers |
966 | 284 when the SSLv3 and TLS protocols are used. |
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285 </para> |
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286 |
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287 </directive> |
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288 |
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289 |
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290 <directive name="ssl_protocols"> |
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291 <syntax> |
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292 [<literal>SSLv2</literal>] |
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293 [<literal>SSLv3</literal>] |
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294 [<literal>TLSv1</literal>] |
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295 [<literal>TLSv1.1</literal>] |
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296 [<literal>TLSv1.2</literal>]</syntax> |
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297 <default>TLSv1 TLSv1.1 TLSv1.2</default> |
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298 <context>mail</context> |
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299 <context>server</context> |
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300 |
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301 <para> |
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302 Enables the specified protocols. |
966 | 303 The <literal>TLSv1.1</literal> and <literal>TLSv1.2</literal> parameters work |
304 only when the OpenSSL library of version 1.0.1 or higher is used. | |
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305 <note> |
966 | 306 The <literal>TLSv1.1</literal> and <literal>TLSv1.2</literal> parameters are |
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307 supported starting from versions 1.1.13 and 1.0.12 |
966 | 308 so when the OpenSSL version 1.0.1 or higher |
309 is used on older nginx versions, these protocols work, but cannot | |
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310 be disabled. |
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311 </note> |
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312 </para> |
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313 |
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314 </directive> |
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315 |
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316 |
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317 <directive name="ssl_session_cache"> |
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318 <syntax> |
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319 <literal>off</literal> | |
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320 <literal>none</literal> | |
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321 [<literal>builtin</literal>[:<value>size</value>]] |
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322 [<literal>shared</literal>:<value>name</value>:<value>size</value>]</syntax> |
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323 <default>none</default> |
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324 <context>mail</context> |
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325 <context>server</context> |
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326 |
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327 <para> |
966 | 328 Sets the types and sizes of caches that store session parameters. |
329 A cache can be of any of the following types: | |
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330 <list type="tag"> |
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331 |
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332 <tag-name><literal>off</literal></tag-name> |
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333 <tag-desc> |
966 | 334 the use of a session cache is strictly prohibited: |
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335 nginx explicitly tells a client that sessions may not be reused. |
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336 </tag-desc> |
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337 |
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338 <tag-name><literal>none</literal></tag-name> |
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339 <tag-desc> |
966 | 340 the use of a session cache is gently disallowed: |
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341 nginx tells a client that sessions may be reused, but does not |
966 | 342 actually store session parameters in the cache. |
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343 </tag-desc> |
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344 |
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345 <tag-name><literal>builtin</literal></tag-name> |
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346 <tag-desc> |
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347 a cache built in OpenSSL; used by one worker process only. |
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348 The cache size is specified in sessions. |
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349 If size is not given, it is equal to 20480 sessions. |
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350 Use of the built-in cache can cause memory fragmentation. |
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351 </tag-desc> |
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352 |
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353 <tag-name><literal>shared</literal></tag-name> |
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354 <tag-desc> |
966 | 355 a cache shared between all worker processes. |
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356 The cache size is specified in bytes; one megabyte can store |
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357 about 4000 sessions. |
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358 Each shared cache should have an arbitrary name. |
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359 A cache with the same name can be used in several |
751
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360 servers. |
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361 </tag-desc> |
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362 |
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363 </list> |
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364 </para> |
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365 |
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366 <para> |
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367 Both cache types can be used simultaneously, for example: |
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368 <example> |
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369 ssl_session_cache builtin:1000 shared:SSL:10m; |
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370 </example> |
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371 but using only shared cache without the built-in cache should |
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372 be more efficient. |
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373 </para> |
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374 |
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375 </directive> |
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376 |
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377 |
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378 <directive name="ssl_session_ticket_key"> |
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379 <syntax><value>file</value></syntax> |
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380 <default/> |
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381 <context>mail</context> |
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382 <context>server</context> |
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383 <appeared-in>1.5.7</appeared-in> |
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384 |
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385 <para> |
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386 Sets a <value>file</value> with the secret key used to encrypt |
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387 and decrypt TLS session tickets. |
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388 The directive is necessary if the same key has to be shared between |
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389 multiple servers. |
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390 By default, a randomly generated key is used. |
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391 </para> |
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392 |
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393 <para> |
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394 If several keys are specified, only the first key is |
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395 used to encrypt TLS session tickets. |
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396 This allows configuring key rotation, for example: |
1019
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397 <example> |
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398 ssl_session_ticket_key current.key; |
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399 ssl_session_ticket_key previous.key; |
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400 </example> |
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401 </para> |
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402 |
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403 <para> |
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404 The <value>file</value> must contain 48 bytes of random data and can |
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405 be created using the following command: |
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406 <example> |
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407 openssl rand 48 > ticket.key |
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408 </example> |
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409 </para> |
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410 |
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411 </directive> |
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412 |
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413 |
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414 <directive name="ssl_session_tickets"> |
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415 <syntax><literal>on</literal> | <literal>off</literal></syntax> |
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416 <default>on</default> |
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417 <context>mail</context> |
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418 <context>server</context> |
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419 <appeared-in>1.5.9</appeared-in> |
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420 |
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421 <para> |
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422 Enables or disables session resumption through |
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423 <link url="http://tools.ietf.org/html/rfc5077">TLS session tickets</link>. |
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424 </para> |
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425 |
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426 </directive> |
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427 |
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428 |
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429 <directive name="ssl_session_timeout"> |
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430 <syntax><value>time</value></syntax> |
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431 <default>5m</default> |
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432 <context>mail</context> |
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433 <context>server</context> |
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434 |
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435 <para> |
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436 Specifies a time during which a client may reuse the |
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437 session parameters stored in a cache. |
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438 </para> |
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439 |
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440 </directive> |
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441 |
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442 |
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443 <directive name="ssl_trusted_certificate"> |
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444 <syntax><value>file</value></syntax> |
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445 <default/> |
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446 <context>mail</context> |
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447 <context>server</context> |
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448 <appeared-in>1.7.11</appeared-in> |
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449 |
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450 <para> |
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451 Specifies a <value>file</value> with trusted CA certificates in the PEM format |
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452 used to <link id="ssl_verify_client">verify</link> client certificates. |
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453 </para> |
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454 |
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455 <para> |
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456 In contrast to the certificate set by <link id="ssl_client_certificate"/>, |
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457 the list of these certificates will not be sent to clients. |
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458 </para> |
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459 |
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460 </directive> |
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461 |
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462 |
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463 <directive name="ssl_verify_client"> |
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464 <syntax> |
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465 <literal>on</literal> | <literal>off</literal> | |
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466 <literal>optional</literal> | <literal>optional_no_ca</literal></syntax> |
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467 <default>off</default> |
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468 <context>mail</context> |
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469 <context>server</context> |
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470 <appeared-in>1.7.11</appeared-in> |
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471 |
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|
472 <para> |
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473 Enables verification of client certificates. |
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474 The verification result is passed in the |
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|
475 <header>Auth-SSL-Verify</header> header of the |
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476 <link doc="ngx_mail_auth_http_module.xml" id="auth_http">authentication</link> |
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477 request. |
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478 </para> |
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479 |
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480 <para> |
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481 The <literal>optional</literal> parameter requests the client |
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482 certificate and verifies it if the certificate is present. |
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483 </para> |
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484 |
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485 <para> |
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486 The <literal>optional_no_ca</literal> parameter |
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487 requests the client |
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488 certificate but does not require it to be signed by a trusted CA certificate. |
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489 This is intended for the use in cases when a service that is external to nginx |
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490 performs the actual certificate verification. |
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491 The contents of the certificate is accessible through requests |
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492 <link doc="ngx_mail_auth_http_module.xml" |
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493 id="auth_http_pass_client_cert">sent</link> |
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494 to the authentication server. |
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495 </para> |
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|
496 |
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497 </directive> |
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changeset
|
498 |
06322891b4e3
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changeset
|
499 |
06322891b4e3
Client certificate directives in mail_ssl_module and associates.
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parents:
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diff
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500 <directive name="ssl_verify_depth"> |
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Client certificate directives in mail_ssl_module and associates.
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501 <syntax><value>number</value></syntax> |
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Client certificate directives in mail_ssl_module and associates.
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502 <default>1</default> |
06322891b4e3
Client certificate directives in mail_ssl_module and associates.
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503 <context>mail</context> |
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Client certificate directives in mail_ssl_module and associates.
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parents:
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504 <context>server</context> |
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Client certificate directives in mail_ssl_module and associates.
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505 <appeared-in>1.7.11</appeared-in> |
06322891b4e3
Client certificate directives in mail_ssl_module and associates.
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506 |
06322891b4e3
Client certificate directives in mail_ssl_module and associates.
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parents:
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507 <para> |
06322891b4e3
Client certificate directives in mail_ssl_module and associates.
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parents:
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diff
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508 Sets the verification depth in the client certificates chain. |
06322891b4e3
Client certificate directives in mail_ssl_module and associates.
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parents:
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diff
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509 </para> |
06322891b4e3
Client certificate directives in mail_ssl_module and associates.
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parents:
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diff
changeset
|
510 |
06322891b4e3
Client certificate directives in mail_ssl_module and associates.
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parents:
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diff
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511 </directive> |
06322891b4e3
Client certificate directives in mail_ssl_module and associates.
Sergey Kandaurov <pluknet@nginx.com>
parents:
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diff
changeset
|
512 |
06322891b4e3
Client certificate directives in mail_ssl_module and associates.
Sergey Kandaurov <pluknet@nginx.com>
parents:
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diff
changeset
|
513 |
664
8283b1048b27
Translated mail modules into English.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
514 <directive name="starttls"> |
8283b1048b27
Translated mail modules into English.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
515 <syntax> |
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Translated mail modules into English.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
516 <literal>on</literal> | |
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Translated mail modules into English.
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parents:
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changeset
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517 <literal>off</literal> | |
8283b1048b27
Translated mail modules into English.
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parents:
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changeset
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518 <literal>only</literal></syntax> |
8283b1048b27
Translated mail modules into English.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
519 <default>off</default> |
8283b1048b27
Translated mail modules into English.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
520 <context>mail</context> |
8283b1048b27
Translated mail modules into English.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
521 <context>server</context> |
8283b1048b27
Translated mail modules into English.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
522 |
8283b1048b27
Translated mail modules into English.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
523 <para> |
8283b1048b27
Translated mail modules into English.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
524 <list type="tag"> |
8283b1048b27
Translated mail modules into English.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
525 |
8283b1048b27
Translated mail modules into English.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
526 <tag-name><literal>on</literal></tag-name> |
8283b1048b27
Translated mail modules into English.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
527 <tag-desc> |
966 | 528 allow usage of the <literal>STLS</literal> command for the POP3 |
529 and the <literal>STARTTLS</literal> command for the IMAP; | |
664
8283b1048b27
Translated mail modules into English.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
530 </tag-desc> |
8283b1048b27
Translated mail modules into English.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
531 |
8283b1048b27
Translated mail modules into English.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
532 <tag-name><literal>off</literal></tag-name> |
8283b1048b27
Translated mail modules into English.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
533 <tag-desc> |
966 | 534 deny usage of the <literal>STLS</literal> |
664
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Translated mail modules into English.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
535 and <literal>STARTTLS</literal> commands; |
8283b1048b27
Translated mail modules into English.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
536 </tag-desc> |
8283b1048b27
Translated mail modules into English.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
537 |
8283b1048b27
Translated mail modules into English.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
538 <tag-name><literal>only</literal></tag-name> |
8283b1048b27
Translated mail modules into English.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
539 <tag-desc> |
8283b1048b27
Translated mail modules into English.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
540 require preliminary TLS transition. |
8283b1048b27
Translated mail modules into English.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
541 </tag-desc> |
8283b1048b27
Translated mail modules into English.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
542 |
8283b1048b27
Translated mail modules into English.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
543 </list> |
8283b1048b27
Translated mail modules into English.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
544 </para> |
8283b1048b27
Translated mail modules into English.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
545 |
8283b1048b27
Translated mail modules into English.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
546 </directive> |
8283b1048b27
Translated mail modules into English.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
547 |
8283b1048b27
Translated mail modules into English.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
548 </section> |
8283b1048b27
Translated mail modules into English.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
549 |
8283b1048b27
Translated mail modules into English.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
550 </module> |