Cisco IP phone is not registering to server
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Cisco IP phone is not registering to server

L2 Linker

Hi all,

I have Palo alto in my network connected to CISCO Call manager server and Cisco DX650 IP phone. I am facing issue that DX 650 is not registering to Call manager server when I capture log I found that the traffic comming from Call manager server and IP phone into Firewall is completing TCP connection but when outgoing traffic from firewall towards Call manager server and IP Phones is sending TCP (RST/ACK) message. I also have cisco 8811 IP phone which got registered so please help me with this


but all other phones are getting registred and all are in same range

I have define service as Application default should I try with any services

What is in your Application?


You should remove application, and set service any in order to test unfiltered connections.



View solution in original post

Solved??? How?

Not solved so far

I will share you once get solved

The phone got registered it's working fine. I allowed WEB BROWSING, SIP, SSL, TFTP and SERVICE: TCP 6950, TCP 8443, TCP 6970, TCP 2445, TCP/UDP 5060

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