The second time within two days now my pfsense has shot itself. So far I
worked out this:
filterdns opens an unlimited number of files (approx 10753).
(Only one filterdns process is running!)
Squid 2.7.9 pkg v.4.3.4 starts logging
httpAccept: FD 51: accept failure: (23) Too many open files in s
I have observed this happening when there are infected machines in the network
that incessantly send web requests. This causes squid to query filterdns which
fills all the states and new connections are slow to open.
Have a look on state table and you will see most of them from 127.0.0.1 to
1