Thank you for the suggestion, Nicolas. However, EXTERN_DHCP is set to YES,
so that is apparently not the problem. I am puzzled that SSH is
portforwarded through the box without problems and without generating error
messages, but IMAP is not.
--On Monday, September 24, 2001 11:24 PM -0400 Nicolas Riendeau
<[EMAIL PROTECTED]> wrote:
> Hi James!
>
>> I am using EigersteinB2, dynamic IP, on a Cox@home cable modem. The box
>> is a Pentium 120, 32 megs of RAM. I have another Linux box on the
>> internal network at 192.168.1.210, that runs an IMAP server, and serves
>> as a file server (Samba) for our Windows machines. The firewall/IP
>> masquerading all seems to be working perfectly, with just one exception.
>>
>> Using the original Eigerstein, with a static IP address from Cox, I had
>> no problem forwarding both SSH and IMAP through the firewall box to the
>> internal server at 192.168.1.210 mentioned above.
>
> The problem, if it's what I think it is and I'm quite sure it is would
> only show up with a dymanic IP...
>
>> Using the stock EigersteinB2 image, modifying /etc/network.conf to
>> forward SSH from external machines through the firewall to the internal
>> server at 192.168.1.210 seems to work properly, but when I uncomment
>> (and correct the internal IP) on the line to forward IMAP, and add
>> either "0/0_imap" or "0/0_imap2" to the line defining external TCP
>> ports, and then reboot, I get the following error message. The message
>> comes on the line immediately after the "DHPACK from 209.219.23.193"
>
>> It says: "IP filters: portfw: illegal local address/port specified"
>
> The problem is not with the port it's with the (EXTERNAL) IP address...
> When that part of the scripts run, EXTERN_IP is not defined, the command
> being incomplete the port forwarding command fails in this way...
>
> With a static IP address EXTERN_IP is always defined so you would not
> have this problem...
>
>> Am I forgetting to do something else in network.conf or somewhere else?
>
> I don't use DHCP (I have PPPOE... )-; ) and my scripts have been somewhat
> tweaked so I can't be sure but have you set EXTERN_DHCP to YES? Setting
> it to YES will fetch the IP address of the external interface and store
> it in EXTERN_IP so it should (EXTERN_IP) be defined when the port
> forwarding rules are executed...
>
> Good luck!
>
> Nicolas Riendeau
>
> PS: Please forgive my English as it is not my mother tongue. Thanks!
>
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