This is a requirement for me. The GNU/Linux box has to be reachable via its public IP address from the Internet.
If I attach the Telo to the DSL modem and put the GNU/Linux box on the Telo's Home Network (as per the Setup Guide's "Alternative Setup Options" Option A or B), ooma will "work" -- I get a dialtone can make a call. However, in this configuration, the GNU/Linux box is assigned a private 10.*.*.* IP address. This is a show-stopper for me since the GNU/Linux box needs to be accessible via the DSL line's public IP address from the Internet.
If I attach the Telo to a network switch inside the firewall, the Telo just blinks a continuous red light (not surprising since there is no DHCP server to assign it an address and no incoming ports open for the Telo on the firewall).
Overall my question is: How can I make the Telo work in this network? (Again, the GNU/Linux box must get a valid/public IP address and be reachable from the Internet.)
- Is it possible to set a static private IP address (and netmask and gateway) on the Telo?
Could the Telo be convinced to work inside the firewall by having a DHCP server assign it a private IP address?
What incoming ports will the Telo need open to receive phone calls?