port forwarding wit sonicwall firewall
Posted on 2006-05-21
hello experts -
I work for a security surveillance company that sells PC based digital video recorders for retail environments. Basically the client has the PC DVR hooked up on their network capturing the video and recording onto the hard drive. This particular one captures standard analalog signals via a capture card. So the client can of course access the recorded and live feed directly from the DVR itself - or they can load the client software on a remote PC and connect remotely and view and watch.
We've sold 100's of these and havent had a problem with the networking side. It always comes down to programming the port forwarding on the routers when there is a problem.
Now, we have a rather difficult customer who is insisting that we get his dvr's to work over the internet for him. He has one unit that works fine, and two (all are at different locations), that dont work.
Both the units that dont work over the internet, do work on the internal network from within the retail store. This I would think would tell me that the problem is somewhere within the router. Unfortunatly, the programming of the router is done by a different company - myself and the customer do not have access to the programming, all done by their "service provider".
One firewall is a Sonicwall Tele3, the other is a Sonicwall TZ170.
The person from the company that programs the router says everthing is port forwarded correctly and to the right internal IP address... however, access from the internet is still not working. Anybody have any ideas how I should go about troubleshooting this?? I feel I'm stuck in the middle, with a hot head end user that is looking to point fingers at anyone he can, because of course he is frustrated.
These DVR's are running Windows XP embedded - and like I said we have never had problems with them, and they are working fine from their internal network. I had them confirm IP addresses, subnet mask, default gateway on both - end user says they are ok.
Please help I need to know how to proceed with this mess.