[asterisk-users] Linksys SPA94x keep-alive reply replies to wrong address (1.4.32)

[James Lamanna]

It appears as though the 489 Bad Event response to the NAT keep alive
event responds to the local address, instead of responding to the
NATted address.
This causes Linksys phones to go amber (no registration) after a short
amount of time after placing calls.
Turning the Linksys NAT keep alive off is a workound, but non-ideal in
may situations.

Apparently the asterisk devs don't even think this is a bug:
https://issues.asterisk.org/view.php?id=17532

Has anyone dealt with this at all?

Thanks.

-- James

SIP trace:

U external.ip:9375 -> asterisk.ip:5060
  NOTIFY sip:asterisk.ip SIP/2.0..Via: SIP/2.0/UDP
10.10.30.65:9375;branch=z9hG4bK-8ebce8bc..From: "xxx-xxx-xxxx"
<sip:9497197231 at asterisk.ip>;tag=3a6a735864619b8bo0..To:
<sip:asterisk.ip>..Call-ID: 19a0bd7
  c-3cb137b7 at 10.10.30.65..CSeq: 395 NOTIFY..Max-Forwards: 70..Contact:
"xxx-xxx-xxxx" <sip:xxxxxxxxxx at 10.10.30.65:9375>..Event:
keep-alive..User-Agent:
Linksys/SPA942-6.1.3(a)-000e08d87445..Content-Length: 0....
#
U asterisk.ip:5060 -> 10.10.30.65:9375
  SIP/2.0 489 Bad event..Via: SIP/2.0/UDP
10.10.30.65:9375;branch=z9hG4bK-8ebce8bc;received=external.ip..From:
"xxx-xxx-xxxx" <sip:9497197231 at asterisk.ip>;tag=3a6a735864619b8bo0..To:
<sip:asterisk.ip>;tag=as4a
  4466b0..Call-ID: 19a0bd7c-3cb137b7 at 10.10.30.65..CSeq: 395
NOTIFY..User-Agent: Asterisk PBX..Allow: INVITE, ACK, CANCEL, OPTIONS,
BYE, REFER, SUBSCRIBE, NOTIFY, INFO..Supported:
replaces..Content-Length: 0....