From owner-freebsd-security@FreeBSD.ORG Fri Jul 11 22:19:52 2008 Return-Path: Delivered-To: freebsd-security@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id B81701065670; Fri, 11 Jul 2008 22:19:52 +0000 (UTC) (envelope-from marka@isc.org) Received: from drugs.dv.isc.org (drugs.dv.isc.org [IPv6:2001:470:1f00:820:214:22ff:fed9:fbdc]) by mx1.freebsd.org (Postfix) with ESMTP id 761DD8FC1C; Fri, 11 Jul 2008 22:19:52 +0000 (UTC) (envelope-from marka@isc.org) Received: from drugs.dv.isc.org (localhost [127.0.0.1]) by drugs.dv.isc.org (8.14.2/8.14.2) with ESMTP id m6BMJmLg042450; Sat, 12 Jul 2008 08:19:49 +1000 (EST) (envelope-from marka@drugs.dv.isc.org) Message-Id: <200807112219.m6BMJmLg042450@drugs.dv.isc.org> To: Brett Glass From: Mark Andrews In-reply-to: Your message of "Fri, 11 Jul 2008 08:54:48 CST." <200807111454.IAA18639@lariat.net> Date: Sat, 12 Jul 2008 08:19:48 +1000 Sender: marka@isc.org Cc: Doug Barton , stef@memberwebs.com, "freebsd-security@freebsd.org" , secteam@freebsd.org, Remko Lodder , Andrew Storms Subject: Re: [Fwd: cvs commit: ports/dns/bind9 Makefile distinfo ports/dns/bind94 Makefile distinfo ports/dns/bind95 Makefile distinfo] X-BeenThere: freebsd-security@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "Security issues \[members-only posting\]" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 11 Jul 2008 22:19:52 -0000 > Is there a way to restrict the ports which BIND selects -- perhaps > at the expense of a small amount of entropy -- such that it doesn't > try to use UDP ports which are administratively blocked (e.g. ports > used by worms, or insecure Microsoft network utilities)? We don't > dare turn these port blocks off, or naive users will fall prey to > security holes in Microsoft products. But if BIND doesn't know to > work around them, lookups will occasionally (and infuriatingly!) > fail. % grep avoid doc/misc/options avoid-v4-udp-ports { ; ... }; avoid-v6-udp-ports { ; ... }; % -- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: Mark_Andrews@isc.org