Someone DDOSing your varnish? Use this to find their IP and ban them!
varnishtop -i TxHeader -I '^X-Forwarded-For:'
Varnish can handle a DDOS/GET pretty fine, but most people don’t have it configured to handle a DDOS/POST.
You can also use “varnishncsa” to view the HTTP URL requests.Michael Mikhjian