[unisog] Blocking Windows Networking at the Border?

Gary Flynn flynngn at jmu.edu
Tue Apr 23 17:09:01 GMT 2002

Phil.Rodrigues at uconn.edu wrote:
> We have been considering blocking ports 135-139/445 at the routers

Oops. Missed that the first time. Port 135 isn't netbios...its the
portmapper in the Windows world. If you block 135, I think you'll
break Exchange and probably some other stuff...DCOM for one.

Gary Flynn
Security Engineer - Technical Services
James Madison University

Please R.U.N.S.A.F.E.

More information about the unisog mailing list