Port Forwarding (more like blocking)

Posted on 2011-10-07
Last Modified: 2012-05-12
I'm have a problem accessing a program on a server that needs to be accessed over the Internet.  We are using an "EyesOn" DVR server where we need to view the images using their "Multi-View Client" software that uses port 3001.  The wierd thing is this all worked previously with the same equipment?  It stopped working suddenly and then the 2Wire and Sonicwall were both reset and reprogrammed which still didn't fix the problem.  There is a ATT DSL connection utilizing a 2Wire Brouter that is set in bridge mode with a static IP.  Behind it is a Sonicwall Firewall Appliance.  There is a site to site VPN tunnel that is setup and works fine.  I used the Public Server Wizard in the Sonicwall to open port 3001 to the EyesOn server (  

I used the software Angry IP Scanner from a remote location to see if port 3001 is indeed open and it's not.  When I ran the Angry IP Scanner on another site that uses the same EyesOn server it shows port 3001 to be open????  When I run a scan on this site the Sonicwall logs show only ICMP packets being dropped?  No mention of a scan being dropped?

Any suggestion for finding out which device is blocking access to port 3001; the 2Wire or the Sonicwall or something else?  BTW, the EyesOn server is running windows XP and the Firewall is disabled!  I can connected to the EyesOn server using the Multiview Client from a client machine when on the local LAN.....

Thanks Experts!
Question by:trinle
    LVL 2

    Accepted Solution

    Here are my thoughts on this:
    1) you know that the EyesOn server is accessible so connect it directly to the 2Wire and then try to access it from outside. If you have static routable IPs set that up or use the DHCP client to obtain an address. The 2Wire in bridge mode should allow that. BTW before you do connect it directly to the router you should make sure it's patched and any services not required have bee shutdown. Check the XP box with Angry IP before connecting directly thought the 2Wire to the Internet.
    if you can connect that would tell you that 2 of your peices of equipment are working as they should.
    2)you probably need to check your Sonicwall config even if you used the wizard. I've had issues with Sonicwalls before and I hate the thought process used on that firewall. You are looking to setup a NAT connection in fact so even if you opened the port you need to direct the traffic to the IP of the EyesOn server.
    3)you could try setting up the 2Wire a standard router and then setup a NAT connection to the EyesOn server.

    Try eliminating as many variables as possible to troubleshoot your problem. Take eveything back as basic as you can and start from there.

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