Date: Sat, 12 Jul 2008 08:19:48 +1000 From: Mark Andrews <Mark_Andrews@isc.org> To: Brett Glass <brett@lariat.net> Cc: Doug Barton <dougb@freebsd.org>, stef@memberwebs.com, "freebsd-security@freebsd.org" <freebsd-security@freebsd.org>, secteam@freebsd.org, Remko Lodder <remko@freebsd.org>, Andrew Storms <astorms@ncircle.com> Subject: Re: [Fwd: cvs commit: ports/dns/bind9 Makefile distinfo ports/dns/bind94 Makefile distinfo ports/dns/bind95 Makefile distinfo] Message-ID: <200807112219.m6BMJmLg042450@drugs.dv.isc.org> In-Reply-To: Your message of "Fri, 11 Jul 2008 08:54:48 CST." <200807111454.IAA18639@lariat.net>
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> 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 { <port>; ... };
avoid-v6-udp-ports { <port>; ... };
%
--
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742 INTERNET: Mark_Andrews@isc.org
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