02-20-2019 01:05 AM
There is requirement of disabling SIP Alg as due to some issue in voice call which get disconnected after few minutes . It has been suggested to turn off SIP Alg in our Cisco Ftd firewalls . What would be the impact on traffic and how can I disable SIP Alg in Cisco FTD firewall which are managed through Cisco FMC .
02-20-2019 01:55 AM
02-22-2019 01:08 AM
After 'configure inspection sip disable' through the cli ,do I need to make changes in Flex config as well or running the command in cli would disable the sip inspection . After analyzing the wireshark logs I come across 401 error for sip protocol .
02-22-2019 05:09 AM
I created a object for DisableInspectProtocol for sip protocol and call that object in Object by duplicating Default_Inspection_Protocol_disable object in Flexconfig Object .I used that user defined policy in Prepend Flex config and when I was about to deploy and push I got an Warning stating that "need to configure same value for these topologies" in site to site tunnel .
My Flexconfig object and policies are ready to be called and push the changes in devices . Please suggest what changes are to be made in the exiting tunnel as in warning not getting much details for the required changes .
02-20-2019 03:15 AM
Just as a matter of interest. is this a 3rd Party suggestion or does it come from Cisco. also, what voice product signals through this FW? cucm? cube? cme?
02-22-2019 01:14 AM
Suggestion was from third party voice team and not from cisco . They were suspecting due to sip inspection calls are getting disconnected when the traffic is made to pass through the firewall . When firewall was bypassed they do not observe any issues .
01-06-2020 12:46 PM
any updates on this issue, I am having a similar issue.
11-23-2020 06:50 AM
I am experiencing an issue where I disable SIP inspection in FTD and it turns itself back on between 3 and 5 days after I disable it. No Audio internally but outside callers can hear. Any Suggestions?
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