[KLUG Members] Iptables

[adam at morrison-ind.com]

> I block the default operation of IM services (not sure about http
> configured IM's) by only allowing access to the internet through my
> authenticated squid server.
> Unless a client supports an authenticated proxy, and my squid config
> allows the required ports, my users don't go there.

In most cases I've seen IM software supports proxies, socks, and just about
everything else.  If they spent half the time implementing decent XMPP support
as they do mashing internet standards we would all be able to get along.