Since a couple of days, I’ve noticed that client IP addresses are logged twice in my Apache log file
httpd-access.log. That’s definetely shit. Here is how I solved the issue:
I modified my:
/usr/local/etc/varnish/default.vcl that after the modification the file looked like:backend default {.host = "127.0.0.1";.port = "8080";}sub vcl_recv { if (req.url ~ ".(jpg|jpeg|gif|png|tiff|tif|svg|swf|ico|mp3|mp4|m4a|ogg|mov|avi|wmv)$") { lookup; } if (req.url ~ ".(css|js)$") { lookup; } } sub vcl_fetch { if( req.request != "POST" ) { unset obj.http.set-cookie; } set obj.ttl = 600s; set obj.prefetch = -30s; deliver; }
Well that’s it after restarting varnishd with:
/usr/local/etc/rc.d/varnishd restart
Client ip is now logged only once in Apache’s log file, Cheers! 
[...] work around this issue, but nothing was coming to me. I did more research and came across this blog article. It is a little bit hard to read, but once you make the configuration readable, I found this code. [...]