Vigor 2800 (Firmware 2.8.2)

I have port 25 open and the port being redirected to a 2k8 server running exchange 2k7.

From within the network if I telnet to the server on port 25, the smtp server responds as expected. From the public static ip address telnetting in on port 25 it just times out.

The server has a single nic, the def. g/w for the nic is pointing at the vigor.

Can anyone advise as to what this could be? I tried calling the support line and after 10 mins they said there could be 2 reasons, one was that the server could be trying to respond and not using the vigor (but couldn't offer any way of checking that), the second reason was totally confusing and made no sense at all, it sounded just like the first answer.

Any ideas/suggestions/things to check would be greatly appreciated.

TIA

Darren

you may not be able to telnet in from the same internet connection, try using the below link which tests your server to see if it is an open relay http://www.checkor.com/

or try shields up to see what ports are open on your router
https://www.grc.com/x/ne.dll?bh0bkyd2

Have you gone into NAT -> inbound ports selected port 25 TCP and entered the LAN IP Address of your email server.

If your email server can access the internet then this rules out a gateway issue.

I hope this helps, let me know

Paul

Hi Paul

CheckOR returns (113) No route to host, however the DNS A & MX records was changed and the MX record resolves to the ip addy assigned to the server.

shieldsup gives the following results:

GRC Port Authority Report created on UTC: 2009-08-11 at 13:43:17

Results from scan of ports: 0-1055

3 Ports Open
0 Ports Closed
1053 Ports Stealth

---

1056 Ports Tested

NO PORTS were found to be CLOSED.

Ports found to be OPEN were: 25, 80, 443

Other than what is listed above, all ports are STEALTH.

TruStealth: FAILED - NOT all tested ports were STEALTH,
- NO unsolicited packets were received,
- A PING REPLY (ICMP Echo) WAS RECEIVED.


Strangely enough, port 987 is open and configured in the port redirection table, but it doesn't come up on shieldsup

ports 25, 80, 443 and 987 are all open (nat->open ports) and all are then set to direct frrom all wan ip to the equal port with the private ip address of the server.

confusing......

Is your gateway IP address on your server is setup as the routers IP address?

Also have you turned of any firewall software on your server to ensure its not blocking the internet connection.

One other way of testing is to temporarily setup a DMZ to your email server

Hi Paul

The only nic on the server lists the vigors (internal) ip address as as the gateway.

The server can get out and browse the net etc, so port 80 is working.

I've tried it with the firewall turned off on the server and the same thing happens....

TIA

Darren

Who is your ISP? also have you tried telnet from a different internet connection onto your domain name / IP address.