From owner-freebsd-questions Sun Feb 21 6:52:30 1999 Delivered-To: freebsd-questions@freebsd.org Received: from cartman.weeble.nws.net (ubppp233-138.dialin.buffalo.edu [128.205.233.138]) by hub.freebsd.org (Postfix) with ESMTP id 119BC11382 for ; Sun, 21 Feb 1999 06:52:25 -0800 (PST) (envelope-from cjm2@earthling.net) Received: from maxpower ([10.0.0.10]) by cartman.weeble.nws.net (8.8.8/8.8.8) with SMTP id JAA22933; Sun, 21 Feb 1999 09:47:37 -0500 (EST) (envelope-from cjm2@earthling.net) From: "Christopher J. Michaels" To: "'Nana Ni.'" , Subject: RE: UDP/TCP Ports 137, 138, 139 Date: Sun, 21 Feb 1999 09:47:23 -0500 Message-ID: <000001be5da9$188cf620$0a00000a@maxpower.weeble.nws.net> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook 8.5, Build 4.71.2173.0 In-reply-to: <19990221055359.11411.qmail@hotmail.com> X-MimeOLE: Produced By Microsoft MimeOLE V4.72.3110.3 Importance: Normal Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG 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. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message