Security Basics
Re: RCP open! Yikes! What to do? Sep 19 2013 07:34PM
Ansgar Wiechers (bugtraq planetcobalt net)
On 2013-09-19 Justin Bowen wrote:
> If you are certain you don't need RPC access (which many don't),
> simply drop a windows firewall (or a replacement you might have in
> place) entry in to block it. Port 139

Port 139 is the NetBIOS session service. The RPC port mapper is
listening on port 135/tcp, the actual RPC connections are established on
ports between 1025 and 5000 (49152 and 65535 on Vista and above). See
MSKB article 832017 [1] for an overview of the port requirements for

Like I said: do not mess with it unless you have a clear understanding
of what it does (and how it works). RPC is required for many kinds of
remote management.


Ansgar Wiechers
"All vulnerabilities deserve a public fear period prior to patches
becoming available."
--Jason Coombs on Bugtraq


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