<html><head></head><body><div class="ydpfd0c5004yahoo-style-wrap" style="font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:16px;"><div id="ydpfd0c5004yiv0724023829"><div><div style="font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:16px;" class="ydpfd0c5004yiv0724023829yahoo-style-wrap"><div dir="ltr">Hi <br></div><div dir="ltr"><span><br></span></div><div dir="ltr" data-setdir="false"><span>I have been looking to log source port used by nginx proxy to forward the traffic to upstream server. What is available is $remote_addr and $remote_port which capture the client IP address and port, the source port used by nginx proxy to upstream seems to be missing. <br></span></div><div dir="ltr"><span><br></span></div><div dir="ltr">Is there any variable for that ? The use case is for troubleshooting between the proxy and upstream. </div><div dir="ltr"><br></div><div dir="ltr">Thanks.<br></div></div></div></div></div></body></html>