Re: What addresses to put on my NEW black list?

[Neil <neil () voidfx net>]

The aforementioned port-blocking would be wiser (though some apps will
automatically tunnel through http/https).  So maybe a combo.  Maybe log 
IPs visiting your 'Access Disallowed' page.  Then if you do decide to 
hunt 'em down, they're just an nslookup away (unless they share 
workstations).

But if you still want to blacklist ips, just from a security stantpoint, 
you'd definitly want to use a bogon list (a list of unassigned ip 
numbers by the IANA, sometimes in DDoSes and by the occasional very 
badly misconfigured network device).

If you're willing to accept a few false positives, you could also look 
into the Dshield lists, a list of cracker ips.

Both easily googled for.  To use either, you need to make sure the lists 
are updated frequently, as IPs are added and removed pretty fairly 
frequently.


Ryan Cummings wrote:
> You might be much better off blocking the ports that
> filesharing/streaming media come in on.  You should be able to do a
> bit of searching around and find the default ports for most of these
> applications and shut them down at the firewall level.  Also depending
> on your firewall or even IDS (this is debatable on the use:P) you
> could filter the content there.
>
> I know searching around on shoutcast.com most of the streaming
> stations use 8000+ for a port number so that is a good start.
>
> On 2/22/06, phunked up! <phunkodelic () gmail com> wrote:
>
> > Trying to create a blacklist for my network.  Want to include
> > addresses for mainly streaming audio, and file shareing.  I have a
> > couple of network abusers who listen to internet radio that just don't
> > follow company policy which has banned it.  Yes I know I should try
> > and bust them but thats a pain in the butt and besides if I do that I
> > don't get the joy or experience of doing this.
> >
> > First off I was going to deny the addresses of various "bad"
> > severs/web sites on the net at my firewall.  I was then going to
> > create a DNS entry that points all restriced IPs to a internal web
> > server that would host a page stating that the site is banned
> > (blackholing IPs).
> >
> > As mentioned above the issue I have is finding the IP addresses to
> > ban.  Any help would be appreciated.
> >
> > Thanks!



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