Re: Messenger services

[raf <raf () comdyn com au>]

sim wrote:

> Thanks for your responses.
> I have blocked AIM, MSN and Yahoo.  I blocked the MSN port and the AIM login
> IP's.  For Yahoo I had to block NNTP but no one uses that here anyway.  ICQ
> is a different problem.  Does anyone know what ports ICQ uses for sure
> and/or how it logs into a server?
> Are there anymore messenger like applications or services?
>
> sim

icq uses tcp/2000-4000 and udp/4000
it presumably doesn't use all of them
but it can use any of them and, with a
stateless filter, that means you have
to allow all of them.

look at ip_masq_icq for details on
how icq connections happen.

raf


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