[Asterisk-Users] Asterisk + BudgeTone (behind NAT)

[Philipp von Klitzing]

Hi!

> > I've concluded that the Netgear router (FVS318) performing the NAT is
> > corrupting the outgoing RTP packets.  Traces confirmed that the BudgeTone
> > is sending them out with a UDP checksum of 0 but the next hop after the
> > Netgear router they are set to a non-zero value (an incorrect one).
> > Asterisk is never even seeing the packets because the kernel is
> > recognizing them as corrupt and dropping them, hence the recvfrom()
> > "Resource temporarily unavailable" errors in rtp.c.
> 
> Here is Netgear's response:
> ---------------------------- Original Message ----------------------------
> SIP VOIP phones do not work with netgear routers. The router will always
> set a value in the checksum.

For the record: With a BT 101 behind NAT provided by a Netgear WGR614 I 
don't experience that error message.

Philipp