Re: [fw-wiz] ip track through natting

From: Devdas Bhagat (
Date: 07/25/03

  • Next message: Josh Welch: "[fw-wiz] A little paranoia for the weekend..."
    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
    firewall-wizards mailing list

  • Next message: Josh Welch: "[fw-wiz] A little paranoia for the weekend..."

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