Bug ID 746825: MRF SIP ALG with SNAT: Ephemeral listeners not created for unsubscribed outgoing calls

Last Modified: Nov 07, 2022

Bug Tracker

Affected Product:  See more info
BIG-IP LTM(all modules)

Known Affected Versions:
13.1.0,,,,,,,,, 13.1.1,,,,, 13.1.3,,,,,,, 13.1.4,, 13.1.5,, 14.0.0,,,,,, 14.0.1, 14.1.0,,,,

Fixed In:

Opened: Oct 15, 2018
Severity: 3-Major


When a temporary registration is created for an unsubscribed user making an outgoing call, an ephemeral listener to receive incoming messages is not created.


The callee of an outgoing call initiated by an unregistered SIP device cannot end the call.


-- If nonregister-subscriber-callout attribute is enabled in the siprouter-alg profile. -- An unregistered client device places an outgoing call. At this point, a temporary registration is created. This temporary registration lives for the life of the call. -- During the lifetime of the temporary registration, if the connection from the client is closed, it is not possible for an external device to reach the client device.


There is no workaround at this time.

Fix Information

When a temporary registration is created, an ephemeral listener is created to receive SIP commands to be forwarded to the client device.

Behavior Change