Strange Server Problems

[Joe Mays]

> I have a dedicated server running FreeBSD 7.0 release, it has been
running
> well for two months. Suddenly, some websites stopped responding, all
> websites hosted on this server are simple PHP sites, if one site is
working,
> all of them should work. I checked the bind/apache/mysql, everything
is fine
> (otherwise no websiets would be working). Could anyone please give
me some
> hints? Where should I start to look into this problem?

Well, logs, obviously. Does anything appear in the apache error log
when you try to hit the sites?