Well to answer the general question. No I do not think you are being paranoid about NAT traversal. NAT is a classic example of
security by obsfucation and thus is not perfect.
It is a Cisco 1750. My understanding of UPnP when it comes to routers is that the device automatically configures a static nat entry.
(ip and port) for people who do not know how to do that. So it ...
Long story short... My vonage stopped working for some calls not others.... Noticed that when I removed an access list that allowed,
as vonage requests, UDP port ranges 5061 5062 10000 - 20000
t ...
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