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Is it possible to avoid a double NAT and port forwarding using a DynDNS, because I have change the configuration from my WRT160N because the wireless modem Arris WTM652 provided by my ISP is blocking me and not providing a way to going outside, I have 3 wireless cameras that I am able to see in the internal network but not outside of it
Answer by Cry Havok · Dec 29, 2010 at 08:38 PM
NAT and port forwarding is entirely to do with your setup and nothing to do with DynDNS - all the Dynamic DNS service provides is a name resolution service. Double NAT too isn't a problem, I've forwarded ports through double NAT (and triple) many times before without problems.
As for your port forwarding problems, it looks like your Arris WTM652 is a cable modem and router. It also supports port forwarding (it's called Virtual Servers in the manual), so problems may be because your ISP blocks ports (many do). This guide should help you otherwise.
If you provide details of what your wireless cameras are connected to (the Arris or the WRT160N), how the WRT160N is connected to the Arris and what IP addresses (and ranges) are used we should be able to help you get everything working.
I have 3 cameras WVC80N
So, they're all connected to the WVC80N only then? In that case your port forwarding is simple and no double NAT is involved. Just forward one port to each camera (eg
8001 to the first,
8002 to the second and
8003 to the third), ensuring that each camera is set to use those ports.