dropped by fw_handle_first_packet Reason: fwconn_key_init_lin when initiating the call from IP phone

[shantilalSuthar]

Hi Team,

I am facing the voice issue in IP phones:

(Site1)IP Phones -----> SIP server -----> FW1 -------> FW2 -------> SIP Server -------> IP Phones (Site2)

When i initiate call from Site 2 to Site 1 IP phones then ringing & voice is working fine but when do the same from Site 1 to Site 2 then ringing works fine but voice is not working.

Checked the zdebug logs & getting below error:

172.x.x.51:27136 -> 10.x.x.10:34164 dropped by fw_handle_first_packet Reason: fwconn_key_init_links (INBOUND) failed

Kindly help to resolve this.

[AkosBakos]

Hi @shantilalSuthar 

This is SMB appliance or normal GW?

There are two SK, maybe help:

https://support.checkpoint.com/results/sk/sk176524

https://community.checkpoint.com/t5/SMB-Gateways-Spark/fwconn-init-links-INBOUND-failed/m-p/51302#M2...

Akos