Home > port forwarding > Windows SBS 2008 - how to diagnose port forwarding problems?

Windows SBS 2008 - how to diagnose port forwarding problems?

June 9Hits:1

We have a Windows SBS 2008 machine. Several ports need to be forwarded from the router to the server (the machine hosts a FTP server, a Web server, and we need to be access it through Remote Desktop).

We recently changed routers (from SpeedTouch to Huawei EchoLife HG520s). With the previous router, port forwarding worked fine. Now, after setting up port forwarding on the new router, nothing works anymore. Can anybody help me with directions on how to diagnose/troubleshoot port forwarding problems on the router and in Windows SBS 2008? E.G.: after forwarding a port in the router interface to the internal IP of the server, how can I see in the SBS 2008 logs if the request is properly forwarded to it?


As long as you have a static IP on the server and not DHCP'd through your router...if it's a home router as some have suggested...it should work as long as you have the proper port going to your server's services.

  • Verify from within the network that you can connect to the services.
  • Verify that you have the correct external address (www.whatismyip.com).
  • Verify that the ports are "open" and not firewalled on the server.
  • Verify that the ports are "open" from the outside (nmap is your friend, otherwise you need another service to scan your external IP)
  • Restart the router to verify that the new settings "took". Shouldn't need to be done, but if it's an inexpensive router, you never know.
  • If you have any logging available for particular services, check the logs to see if there's any connection attempts or anything showing up on the server side.

You might want to consider with those services (FTP especially) just putting the server in a DMZ. You're really kind of opening it to all sorts of hack attempts with the services you mentioned all on one machine and I personally wouldn't want it on the same subnet as my personal machines. DMZ it and you might have an easier time than individual port forwarding.

Use Telnet to connect to your external IP and the port you forwarded. If it connects it is working :)

If its not give us some screenshots of your port forwarding page on the router config.

Take a look at WireShark http://www.wireshark.org/

This will let you monitor the network traffic on the SBS side of things.

As Campo suggested, running telnet against the various ports.

However, RDP doesn't respond as well to telnet as services such as SMTP, POP, etc. You will get a connection, but no output to the screen, so you have to take note of the difference between that and a timeout for checking RDP via telnet.

With WireShark running you can make the telnet attempts to get a better view of what is going on at the server.

Not familiar with your router, so can't say much there. It looks like it is a standard home network router though, so probably not a lot of diagnostic options there.

Related Articles

  • Windows SBS 2008 - how to diagnose port forwarding problems?June 9

    We have a Windows SBS 2008 machine. Several ports need to be forwarded from the router to the server (the machine hosts a FTP server, a Web server, and we need to be access it through Remote Desktop). We recently changed routers (from SpeedTouch to H

  • is manual configuration of windows sbs 2008 permanently disabledDecember 29

    I currently run a windows 2003 sbs. While this has some wizards to help you configure it, it still is very much possible to administer this as if it were an ordinary windows server 2003 server. Is it true that this is not possible on windows sbs 2008

  • How can I monitor user access to a shared folder on Windows SBS 2008August 20

    I have multiple shared folders on Windows SBS 2008 server. I need to be able to tell if a domain user is accessing these shares and copying large quantities of files to their laptop. Is there a way of turning on auditing in group policy to log an eve

  • Using Windows SBS 2008 with an external DHCP ServerJuly 15

    Trying to install Windows SBS 2008 on an existing network. It won't let me use the existing DHPC server During the "Connetct to the Internet" wizard I get "An external DHCP Server is running on your network at xxx.xxx.xxx.xxx, xxx.xxx.xxx.x

  • delayed login to Windows SBS 2008April 4

    Last week I had a problem with my server (Windows SBS 2008 ), so I made a restore point to resolve that problem. But after I did it any workstation (Windows 7) try to login takes 50 seconds. I tried to find an error in event viewer, but there are no

  • Could I use Windows 7 instead of Windows SBS 2008 for this server?April 20

    First off, I'm not a sys admin. I'm just a software developer trying to help out my parents' small business. Right now they have one server, a domain controller with a P4 processor running Windows SBS 2003. They also have this machine hosting QuickBo

  • Do I need to purchase addtional licenses to use Terminal Services RemoteApp on Windows SBS 2008?July 23

    I want to make a single application avail. via Terminal Services RemoteApp on a Server running Windows SBS 2008. Do I need to purchase any additional licenses or does SBS 2008 come with some? --------------Solutions------------- "You cannot use a ser

  • Windows SBS 2008 as file server uniquelyNovember 17

    I'm setting up an Active Directory domain. This domain must have two separate servers, one acting as primary domain controller and the second one acting as file server only. My wonder is if both servers, file server and primary domain controller, can

  • How do I add client computers to a Windows SBS 2008 domain?February 28

    We have a LAN and the router is the DHCP server. We have a server with Windows SBS 2008, it has the IP address while the router has the IP address I have tried to add a client computer to the SBS domain by visiting http://con

  • Windows SBS 2008 and Exchange Move to external provider. MSSTD

    Windows SBS 2008 and Exchange Move to external provider. MSSTDJune 7

    We have recently moved our exchange from out internal server (Windows SBS 2008) to an external provider for various reasons. However when we now set-up our new email accounts, no matter what setting we enter in the "Exchange Proxy Settings" wind

  • Windows SBS 2008 user unable to RDP in even though it is in the correct groupsAugust 25

    Problem: A user was accidentally deleted from a Windows SBS 2008 server running Active Directory and we have been unable to grant it RDP rights - the error message states that the account needs to be granted 'Logon through Terminal Services Rights'.

  • Renaming user account and email account in Windows SBS 2008November 4

    I have one employee leaving and a new employee joining. Can I just rename the user account of the old employee with the name of the the new employee? Can I do the same for the exchange account? I am using Windows SBS 2008. --------------Solutions----

  • Windows SBS 2008 to Windows Server 2012 migrationDecember 17

    I am in the process of upgrading my Windows SBS 2008 server running Exchange, Active Directory and as a File server to Windows Server 2012 essentials. Now I know that Windows Server 2012 essentials does not have exchange, thus I was looking to migrat

  • No IP address on Windows SBS 2008

    No IP address on Windows SBS 2008April 21

    We have a strange problem in our Windows SBS 2008 and it just came over a night. The problem is that Windows says that we are not connected to any IP4 or IP6 network but it recognises that the network cable is plugged in. The server is Domain Control

  • User/group - folders mapping on Windows SBS 2008 April 30

    This question already has an answer here: List user's folder access permissions 4 answers How can I know which files/folders are accessible by a specific user/group on Windows SBS 2008? --------------Solutions------------- Permissions are stored on t

  • Strange port forwarding problemApril 2

    I've got a strange port forwarding problem. The port forwarding to my internal webserver ( on Port 80) works without a problem but the port forwarding to a windows server ( on port 3389 doesn't work. The port 3389 is open. Any idea

  • Can I migrate my SSL certificate to windows SBS 2008?December 31

    I have currently on my windows SBS 2003 box an SSL certificate for www.mydomain.com. I understand that for the 2008 SBS box I need a certificate for remote.mydomain.com. Can I simply export and import the certificate, or must I contact the issuer to

  • Cleaning up AD and DNS on Windows SBS 2008February 19

    I searched serverfault.com for duplicates of this question but couldn't find anything close enough for my needs, so here goes. I'm administering a small Windows domain, where a Win SBS 2008 is the DC and a Win Server 03 acts as our print and file ser

  • Windows SBS 2008 problemApril 22

    I was today on clients site that has Windows 2008 SBS installed with Symantec EndPoint Protection. Problem is that after I logged in tried multiple commands like services.msc, msconfig typed in "Run" but nothing was started. For the first 5 minu

  • Windows SBS 2008 DHCP problem: no DNS updatesDecember 13

    I have an annoying problem with SBS 2008. Everything was fine till I authorized external DHCP running on Linksys router. Now I have that kind of situation where I think everything must be fine but it isn't. Now DNS records of computers in domain aren

Copyright (C) 2017 ceus-now.com, All Rights Reserved. webmaster#ceus-now.com 14 q. 0.968 s.