[Asterisk-Users] Cisco phones config over internet

[Martin Roy]

I saw a previous post about this problem but no one seems to have a real 
solution for it...

I have a few Cisco IP Phones 7960 that I want to install at remote 
locations. I can easily setup my router to forward the ports of Asterisk 
BUT I don't want to open my TFTP server over the Internet as all the SIP 
configs are in clear text...

I was first of all considering making VPN connection between my main 
office and the remote locations but that's fine if I have VPN routers on 
both side. But if someone use a phone at home and they have no router or 
cheap ones I'm stuck... I won't ask everyone to purchase a VPN Router 
just to have the phone working.

I know I could open a second TFTP server just for the few phones that 
are not on my network and leave the Name, Authentification Name and 
password empty in the SIP config file and add it manually on each phones 
but I would still need to provide the SIP firmware and all the other 
files open on the internet...

In the Cisco phone I don't even see a way to change the default TFTP 
port but even that solution doesn't seem good enough...

Anyone having a working setup?

Thanks

Martin