Re: smtp from internet failes, internal works

I've got a similar problem. I have a multihomed Exchange 2003 server. The
external interface is connected to the DMZ port on my Sonicwall TZ170. I've
turned on the relavent rules for SMTP and Telnet but i am still unable to
telnet in on the external interface but everything from my LAN side works
fine.

I guess whatever is causing this problem is also causing by inability to use
OWA from the internet, and yet works fine from the LAN. I am constantly
prompted to login, even though my credentials are correct. Again, i have
turned on the relavent rules; HTTP and HTTPS.

Any help gratefully received.

Jason.



"Kip Ng [MSFT]" <king@xxxxxxxxxxxxxxxxxxxx> wrote in message
news:uCPSnxDIFHA.156@xxxxxxxxxxxxxxxxxxxxxxx
> Sounds like your firewall router is not doing the NAT right. You may want
> to look into that.
>
> --
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>
> "Ben Van Cauwenberghe" <ben.vancauwenberghe@xxxxxxxxx> wrote in message
> news:%23pK2oJBIFHA.1288@xxxxxxxxxxxxxxxxxxxxxxx
>> Hi,
>>
>> I installed a windows2003 SBS server behind a hardware firewall router.
>> This router is connected to the internet and has a fixed IP. The MX
>> record of the domain is set to this ip.
>>
>> the firewall rules on my router for pop en smtp are the same, they are
>> allowed and forward everything from port 25 and 110 to my windows 2003
>> SBS server.
>>
>> If I telnet from a computer on the internet, I can connect to port 110
>> (of the win2k3 sbs) on my fixed IP, but cannot connect to port 25. If I
>> telnet from a computer on the local domain to the internal ip address of
>> the windows2003 sbs server, I can connect to port 110 AND port 25!
>>
>> How can I allow smtp connections (tcp port 25) from the outside. Or did I
>> forgot some setting?
>>
>> thanks,
>>
>> Ben
>>
>
>


.

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