Linked by David Adams on Mon 21st Mar 2011 20:14 UTC, submitted by Anonymous
GNU, GPL, Open Source The GNU Project has announced a new project called GNU Free Call, an open source Skype alternative that will offer anonymous VoIP and will use the GNU SIP Witch server as the back end. GNU SIP Witch requires a minimum of system resources so it can be used on cell phones too so it seems the goal is to provide a cross-platform application, the immediate target most probably being Android.
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RE[4]: 'Twas about time
by spiderman on Tue 22nd Mar 2011 19:01 UTC in reply to "RE[3]: 'Twas about time"
spiderman
Member since:
2008-10-23


NAT is useful even if address space wasn't a problem. For example, I routinely forward SSH and SMTP connections using simple iptables forwarding. (Side Note: it is extremely disappointing that Linux IPv6 stack hasn't even implemented this port forward functionality).

don't agree. Even if you have a dedicated ssh server that has the same address as your router if that makes sense in your setup, voip clients should still have their own address as this is how they can be reached. NAT is pretty useless with ipv6. Just give one address per application if you need to.

Even if NAT is out of the picture, you ignored my point about SIP being impossible to firewall without custom code (an ALG). Presumably firewalls will have greater importance once (in the distant future) NAT gateways are gone.

There is no technical reason that SIP requires more than one (static) port, it is a design decision that will make SIP forever difficult to use.

Take note how relatively well P2P apps work behind NAT considering the limitations.

agreed, although this is not that much of a problem with ipv6 since your voip can have its own ip.

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