CP 750 Incoming SIP connection not work.

[luk89as]

Hello,

I have a problem with telephone connections to my SLACAN exchange.

SIP connection is valid but blocked by UTM Checkpoint 750.

Only outgoing connections work.

Incoming calls from outside (city) are not working. The headquarters does not speak.

The logs show that the connection from the SIP server comes and is accepted by the firewall, but the connection is not established.

What else can I do to start the connection?

I have a Checkpoint 750 in another location and the SIP routing is working. But the telephony service provider is a different company.

Screenshots in the attachment.

[G_W_Albrecht]

See VoIP Issue and SMB Appliance (600/1000/1200/1400)  and SIP inspection issues on 1550 Appliance !

[luk89as]

Hello,

I redirected SIP ports manually and disabled SIP_UDP and SIP_TCP inspection.

As a service, I added manually entered SIP ports, omitting the ready-made configuration implemented in Checkpoint.

Everything is working fine now. However, I have no insight into the security logs about SIP, but it is not important.