Unable to Pre-allocate H225 Call Signalling Connection for faddr

[Mohd Imtiaz Hussain]

HI,

Getting following logs on Cisco ASA firewall, Avaya phones are getting disconnected.

Please let us know how to fix this issue.

log on ASA:

Unable to Pre-allocate H225 Call Signalling Connection for faddr

[Dennis Mink]

Have you configured H323 inspection on your ASA? If not, do so and test again.

[Mohd Imtiaz Hussain]

can you let me know how to configure H323 inspection on ASA.

[sofiane7704]

policy-map global_policy
 class inspection_default

inspect h323 h225 
inspect h323 ras

[Nathan P]

I had the opposite issue, if this didn't fix your issue, you may want to try disabling H323 inspection. I went through the GUI under Firewall>Service Policy Rules>Global>Inspection_Default>Rule Actions>Protocol Inspection, and unchecked H.323 H225. After I saved and applied, the logs no longer showed the error.