[NBLUG/talk] Outbound port filtering

[David]

Trying to outguess what port every trojan is not efficient.  Is there a way you
can block all ports and only allow certain outbound ports you know you will use?
 Barring that, block the MS filesharing ports and network browsing ports.

~David~

William Tracy wrote:
> Hello,
> 
> I've been on a Bittorrent download binge since getting DSL up and
> running. :-)
> 
> However, I'm still dinking around with the firewall settings on my
> Linksys. Inbound requests are all filtered out by default, which looks
> good for now. However, no outbound requests are filtered at all by
> default. I've been dinking around trying to figure out what ports to
> block.
> 
> I finally hit a wall though--as far as I can tell, the firmware will
> only let me block up to five sets of ports. That's not quite enough if
> I want to take the approach I had in mind of essentially blocking
> everything that I don't know that I need.
> 
> So, any thoughts on what ports really need to be blocked for a home
> network or network security must-reads? Actually, I'm not entirely
> sure what kind of attacks I would even be blocking this way, unless it
> would be some trojans trying to "phone home".
> 
> I'm looking forward to the next meeting. :-)
> 
> William
> 
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