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Date:      Sun, 21 Feb 1999 09:47:23 -0500
From:      "Christopher J. Michaels" <cjm2@earthling.net>
To:        "'Nana Ni.'" <raha49@hotmail.com>, <freebsd-questions@FreeBSD.ORG>
Subject:   RE: UDP/TCP Ports 137, 138, 139
Message-ID:  <000001be5da9$188cf620$0a00000a@maxpower.weeble.nws.net>
In-Reply-To: <19990221055359.11411.qmail@hotmail.com>

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Yes you could just block incoming connections from your firewall on these
ports.  Although reading your message I'm not sure I understand exactly what
you want to block.  Are you intending on blocking netbios connections coming
from an outside network to an inside network, or are you just blocking these
connections to the FreeBSD machine?
-Chris

-----Original Message-----
From: owner-freebsd-questions@FreeBSD.ORG
[mailto:owner-freebsd-questions@FreeBSD.ORG]On Behalf Of Nana Ni.
Sent: Sunday, February 21, 1999 12:54 AM
To: freebsd-questions@FreeBSD.ORG
Subject: UDP/TCP Ports 137, 138, 139


Hi,

I've read that UDP/TCP ports 137-139 which are used for NetBios, can be
some security threats to system. Does anybody knows if I can block at
least incoming this kind of packets on firewall without making any
restrictions for Windows (NT/95) PCs?

Thanks,
Nazila N.



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