Re: [fw-wiz] ip track through natting
From: Devdas Bhagat (dvb_at_users.sourceforge.net)
Date: 07/25/03
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- In reply to: Paul Robertson: "Re: [fw-wiz] ip track through natting"
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To: firewall-wizards@honor.icsalabs.com Date: Fri, 25 Jul 2003 09:13:47 +0530
On 24/07/03 12:40 -0400, Paul Robertson wrote:
> On Wed, 23 Jul 2003, parul devgan wrote:
>
> > The mail server is on a private network, the client ip
> > address is natted when the request comes to the mail
> > server. The problem is that I have to find the client
> > ip address without the nat address.
> >
>
> That's an abnormal setup. You should NAT the server's address, not the
> client's. Otherwise, you'll have to get the info from the NAT device, or
> trust the EHLO/HELO or message headers.
This is typical for an ISP setup here, where a small redistributor will NAT
from a single IP address and have his clients use his providers SMTP
server. Not a good thing, but people like to go cheap :(.
To the OP, this is simply not possible. You either run a server on the
NATing device and use that, or you use SMTP AUTH.
Devdas Bhagat
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- Previous message: Mark Tinberg: "RE: [fw-wiz] Syslog set up"
- In reply to: Paul Robertson: "Re: [fw-wiz] ip track through natting"
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