I rebooted my machine to try to get rid of high wait times this morning, and after the reboot nothing worked anymore.
I could use ICMP outside the firewall, but no other traffic would work.
I tried disabling IPS/HTTP proxy and re-enabling them.
I tried re-creating my packet filter rules, still didn't fix.
My packetfilter log was full of entries similar to the below, for everything from my Cisco VPN client, to Lotus Notes, HTTP, and more, With or without http proxy enabled (for the http traffic).
2007:11:09-08:48:57 (none) ulogd[2504]: id="2001" severity="info" sys="SecureNet" sub="packetfilter" name="Packet dropped" action="drop" fwrule="60003" outitf="ppp0" srcip="216.75.172.220" dstip="216.163.188.43" proto="6" length="52" tos="0x00" prec="0x00" ttl="64" srcport="53617" dstport="80" tcpflags="ACKFIN "
A second reboot seems to have fixed it, but not before my most impatient user (my wife) noticed everything was down. [:)]