Re: RE: Help w/ Port 137 Traffic

["R. DuFresne" <dufresne () sysinfo com>]

depending upon the kinda of windows OS' behind your firewall, you might
wish to add 135-139, tc and udp, as well as 445, and 1433,1434.  Of course
1080 1090 1900 5000 might not hurt to be blocked either, depending upon
services running on those systems.  IM fileshareing ports might well be blocked as well, at
the least, 4443 1503 3574 5010 6891 7320.  And of course, this is not an
exhaustive list.  


Thanks,

Ron Dufresne

On Sun, 13 Oct 2002, Mike McCandless wrote:

> Thanks for all the replies.  The change I believe I will make in my
> firewall rules is to explicitly block inbound 137-139 traffic.  My
> default iptables policy is to deny, and these are not ports I have
> opened up, so....they should be being blocked, but an extra rule to
> catch this up front won't hurt.
>
> I have to add one clarification to the scenario and apologize for not
> including this up front:  could running Samba (as a master browser/file
> server - not domain controller) be the source of the problem?  Are there
> some outbound ports I should be blocking when (I assume) Samba announces
> itself periodically as the master browser?
>
>
> --------------------------------------------------------
> Mike McCandless
> michael () prismbiz com
>
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