On Thu, Dec 11, 2014 at 12:35 PM, Warren Young <wyml at etr-usa.com> wrote: > We noticed this problem when web browsers would refuse to connect to the > server. *Then* we discovered the netstat oddity, and *then* we found that > changing the Listen line in httpd.conf fixed it. > > That leaves me still wanting an explanation for what happened. > was the fix the config change or restarting of the service? did netstat show client connections to port 80 in other states(FIN_WAIT/etc)? high load apache websites can often run out of connections due to the limits in httpd.conf "<IfModule prefork.c>" section. these limits can be increased if clients can no longer connect due to http child processes being stuck in other tcp states.