Re: [clamsmtp-users] loop detected in transparent proxying

[Voy U. <vu...@gm...>]

On the newer lenny box, I tried with 2 other versions of clamsmtp

- downloaded 1.8-5 from debian etch archives.
         Everything works fine with this on debian lenny also.
- downloaded 1.10-7 from lenny unstable
         "loop detected" error.

Looks like this is a bug introduced between 1.8-5 & 1.8-6 & still exists
in 1.10-7.

Is there anyone else who is using clamsmtp in a similiar way & isn't
facing this issue?



> ----- Original Message -----
> From: Voy User
> Sent: 01/21/11 03:40 PM
> To: cla...@li...
> Subject: [clamsmtp-users] loop detected in transparent proxying
> 
> Hi,
>  I am running p3scan, clamav, clamsmtp, spamassasin on a gateway debian box (lenny).
> The box itself doesn't run any mail server or smtp server. It just acts as a gateway
> where virus check is done.
> 
> My clamav version is 0.96.5
> My clamsmtp version is 1.8-6
> 
> I have the following iptables rule 
> -A PREROUTING -i ! lo -p tcp -m tcp --dport 25 -j REDIRECT --to-ports 10026
> 
> This is my clamsmtp.conf
> ------------------------------------
> MaxConnections: 7
> Listen: 0.0.0.0:10026
> ClamAddress: /var/run/clamav/clamd.ctl
> TempDirectory: /tmp/clamsmtp
> PidFile: /var/run/clamsmtp/clamsmtpd.pid
> Quarantine: off
> TransparentProxy: on
> User: clamav
> ------------------------------------
> 
> Now when I try to send mail through SMTP from a windows box behind the gateway,
> it fails & this is the stuff, I see in /var/log/mail.log
> 
> -----------------------
> 
> Jan 21 15:27:42 localhost clamsmtpd: 100000: accepted connection from: <windows machine IP address>
> Jan 21 15:27:42 localhost clamsmtpd: 100001: accepted connection from: <gateway box IP address>
> Jan 21 15:27:42 localhost clamsmtpd: 100001: loop detected in transparent proxying
> -----------------------
> 
> So looks like each connection from the windows client shows as 2 connections - one from the windows
> box & one from the box where clamsmtp is running.
> 
> I had a similiar setup running earlier with an older version of Debian (etch) & clamav (0.95.2)
> & clamsmtp (1.8-5) & everything worked fine - there I could see only one connection in the /var/log/mail.log
> 
> I have compared all possible settings between the two debian boxes but unable to figure out why this isn't
> working.
> 
> Can someone help?
> 
> regards
>  
> 
> 
> 
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