Firewall Wizards mailing list archives

RE: Help w/ Port 137 Traffic


From: "Mike McCandless" <michael () prismbiz com>
Date: Sun, 13 Oct 2002 10:13:24 -0400

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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