Date: Sat, 31 Jan 2004 13:39:24 +0000 From: Matthew Seaman <m.seaman@infracaninophile.co.uk> To: "J.D. Bronson" <jbronson@lonebandit.com> Cc: freebsd-questions@freebsd.org Subject: Re: tcp blackhole and ident Message-ID: <20040131133924.GB48307@happy-idiot-talk.infracaninophile.co.uk> In-Reply-To: <6.0.2.0.2.20040131072955.00b54ee8@cheyenne.wixb.com> References: <6.0.2.0.2.20040131072955.00b54ee8@cheyenne.wixb.com>
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On Sat, Jan 31, 2004 at 07:32:36AM -0600, J.D. Bronson wrote:
> I have a question. I setup the following in sysctl.conf:
>=20
> net.inet.tcp.blackhole=3D2
> net.inet.udp.blackhole=3D1
>=20
> ..Well this works, but now I have a new issue.
> I run sendmail and as such, need to allow TCP 113 into this machine
> and yet get CONNECTION REFUSED. - I dont want to run IDENT, but
> need to still get the CONNECTION REFUSED...
Run ipfw(8) or a similar firewall and set up a rule that sends an ICMP
reject whenever it detects an incoming connection on port 113 as part
of your firewall configuration. Eg. something like:
01600 reset tcp from any to me dst-port 113 setup
Cheers,
Matthew
--=20
Dr Matthew J Seaman MA, D.Phil. 26 The Paddocks
Savill Way
PGP: http://www.infracaninophile.co.uk/pgpkey Marlow
Tel: +44 1628 476614 Bucks., SL7 1TH UK
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