Cisco handset from home to office SIP/NAT/NAT/SIP

Asterisk Asterisk Support
1

Have Asterisk running at work behind a Sonicwall firewall (VOIP and QoS optimizations builtin) and a Cisco 7960G with SIP v7.4 behind a Dlink home gateway at home.

Tried opening the TFTP (UDP 69) & SIP (UDP 5060-5061) ports at the firewall with NAT maps to Asterisk box at work and using the correct public IP addresses for the phone at home. Sonicwall’s VOIP connection monitor shows my handsets requests heading inbound at the firewall - but ultimately TFTP requests timeout on the phone when booting and no connection by voice to Asterisk in spite of the call appearance at the firewall.

Anyone done this or have some easy tips?

Thanks gang.

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2

My experience is that Cisco handsets cannot NAT, although I admit not to trawling the documenation in detail.

3

[quote=“benAlva”]Have Asterisk running at work behind a Sonicwall firewall (VOIP and QoS optimizations builtin) and a Cisco 7960G with SIP v7.4 behind a Dlink home gateway at home.

Thanks gang.[/quote]

Hi, one thing you can try is to connect the phone directly to internet, just to isolate the problem.
Another thing you can do is make a tftp connection from a pc at home…
For example, if you have a linux at home, you can do the following
tftp
connect X.X.X.X (the ip of the tftp server)
get filename (filename is the xml file of your phone).

Please let me know if you could try my suggestions.

Good luck.