varnish

How to change varnish port in Ubuntu

To clear cache, run

/usr/bin/varnishadm -S /etc/varnish/secret  -T 127.0.0.1:6082 "ban req.http.host ~ .*"

Get stats

varnishstat

See Varnish logs

varnishlog

To view logs for “Error 503 Service Unavailable” error.

varnishlog -q 'RespStatus == 503' -g request

mod_rpaf help with showing users real IP when site is behind a proxy or varnish.