Tom Collins said:
> On Nov 11, 2004, at 9:41 AM, Matthew Walker wrote:
>> Now... Remote Test:
>>
>> arsenic ~ # telnet mail.thebraingarden.com 25
>> Trying 209.90.91.5...
>> Connected to user-5.pl107658.fiber.net.
>> Escape character is '^]'.
>> 220 *****************************
>
> Can you watch the network with a packet sniffer like Ethereal?  You
> said that 209.90.91.5 is actually port forwarded to your server.  It
> looks like it's not transparent -- like there's a proxy of some sort
> running on 209.90.91.5.
>
> Is it possible to connect directly to the Ethernet interface of the
> server without going through any firewalls?
>

Yes, it is. It's also accessible from the 10.* private network that's used
at work... Here, let me make a little diagram...


Internet (209.90.91.5) <=> Server (192.168.1.19) <=> Internal (10.*)


There's NAT of some kind going on at both boundaries. I'm attempting to
find someone who knows, but I haven't found anyone yet. Regardless, the
only problem is with the Internet <=> Server interface. Clients on the
Internal network have no problems.

-- 
Matthew Walker
Kydance Hosting & Consulting
http://www.kydance.net

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