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Date: Mon, 26 May 2003 14:15:05 -0300
From: Fernando Schapachnik <fernando@mecon.gov.ar>
To: "G.P. de Boer" <g.p.de.boer@st.hanze.nl>
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cc: freebsd-security@freebsd.org
Subject: Re: sshd doing dns queries on localhost?
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En un mensaje anterior, G.P. de Boer escribió:
> On Mon, 2003-05-26 at 18:32, Fernando Schapachnik wrote:
> 
> <something about DNS lookups when SSH'ing>
> 
> This is becoming a FAQ. Current OpenSSH daemons implement a feature
> called 'privilege seperation', which splits the daemon in two: one part
> running as root, the other as user 'sshd' (or whatever you define),
> minimalizing security threats. One disadvantage though: /etc/resolv.conf
> is read AFTER chroot()ing to the directory '/var/empty' (talking about
> OpenSSH in base). If resolv.conf can't be found there, sshd will lookup
> IP's via 127.0.0.1, generating those log_in_vain messages you see.
> 
> How to solve? Well.. copy /etc/resolv.conf to /var/empty/etc/. 


Forgot about privsep... Of course that was it. Thanks!