We have an asterisk installation that's on a residential-grade DSL and its port number (as visible from the outside) keeps changing, every time it registers. fuser indicates that asterisk is only using port 4569 for IAX2 (as it should), but when it goes out over the Internet, the port number is reported as something in the 10000's and it changes every time.My guess would be NAT..
Obviously, this is a network issue of some type, but can anyone explain more precisely why this happens and how to stop it? We have some other installations that stay put on port 4569 like they're supposed to. Network issues aren't my area of expertise.
Thanks.
NAT boxes typically use high port numbers to map the return path for the data.. each time your box is registering it is probably being allocated another port on the NAT..
Of course I could be wrong.. ;)
Later..
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