Firewall Wizards mailing list archives
Re: RE: Help w/ Port 137 Traffic
From: "R. DuFresne" <dufresne () sysinfo com>
Date: Mon, 14 Oct 2002 14:04:52 -0400 (EDT)
On Mon, 14 Oct 2002, Devdas Bhagat wrote:
On 13/10/02 14:40 -0400, R. DuFresne wrote: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.Wouldn't the Right Thing(tm) be to block everything and then allow only what traffic is supposed to go out? Not logging 137/udp is a good idea because it fills up the logs and does not add any significant information to them.
It certainly would. What is chosne to be passed to the backend windows systems requires care and illigence though, and extensive logging should be engaged, for those ports opened. Thanks, Ron DuFresne -- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ admin & senior security consultant: sysinfo.com http://sysinfo.com "Cutting the space budget really restores my faith in humanity. It eliminates dreams, goals, and ideals and lets us get straight to the business of hate, debauchery, and self-annihilation." -- Johnny Hart testing, only testing, and damn good at it too! _______________________________________________ firewall-wizards mailing list firewall-wizards () honor icsalabs com http://honor.icsalabs.com/mailman/listinfo/firewall-wizards
Current thread:
- Re: Help w/ Port 137 Traffic, (continued)
- Re: Help w/ Port 137 Traffic Paul D. Robertson (Oct 13)
- Re: Help w/ Port 137 Traffic Mikael Olsson (Oct 13)
- Re: Help w/ Port 137 Traffic Vincent Haverlant (Oct 15)
- RE: RE: Help w/ Port 137 Traffic Stefan Norberg (Oct 13)
- RE: RE: Help w/ Port 137 Traffic Frank Knobbe (Oct 13)
- RE: RE: Help w/ Port 137 Traffic Stefan Norberg (Oct 14)
- Re: RE: Help w/ Port 137 Traffic Devdas Bhagat (Oct 14)
- Re: RE: Help w/ Port 137 Traffic R. DuFresne (Oct 14)