[Serusers] Registering issues

[Mr Greg Plater]

Hi
 
I have Ser Express router on a Public ip address with no firewall between it
and the internet.
I have two hardware phones and two software clients connecting to the SER
box. 
 
All 4 clients are on a private network with Nat connecting to a gateway on a
public ip address in the same range as the Ser Unit.
 
They register and I can make calls between these 4 clients.
 
When I go to a remote location on a different ISP. 
 
I check the computer is on a public IP and no firewall is enabled. I place
my SER details for registration into the client and it fails to register. 
 
I tried xlite with its debug screen and I see the send but note no response.

 
When I use ethereal I capture the send but note no response packet received.

 
I have tried a couple of port scans from the internet and I confirm port
5060 is open and listening.
 
I have an Asterisk box on a public ip address also in the same range as the
SER unit. It registers to SER and ser routes calls to it and bridges SIP -
H323 out to a Gatekeeper and calls work within normal limits. 
 
What am I doing wrong?   
 
SERWEB is working and the website etc. all work from the internet no issue.
 
 
 
 
 
 
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