Firewall ports rules for intercluster trunk between 2 CUCM

[mhm_ameen]

hi, need to know if we need to open UDP 16384 – 32767 from IP phones subnets betwwen different clusters since these subnets are different from CUCM or no need jut we will open below ports on CUCM subnets on both cluster

office 1

permit: TCP 1720; TCP/UDP 5060, 5061; UDP 16384 – 32767

source: CUCM subnet

destination: office 2 CUCM subnet

From office 2

permit: TCP 1720; TCP/UDP 5060, 5061; UDP 16384 – 32767

source: CUCM subnet

destination: office 1 CUCM subnet

thanks in advance

[Scott Leport]

Hi,

Not sure what version of CUCM you are running as you haven't mentioned it, but here are the list of TCP / UDP ports for version 12.5X

https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/admin/12_5_1SU3/systemConfig/cucm_b_system-configuration-guide-1251su3/cucm_m_tcp-and-udp-port-usage-12-0.html

The TCP / UDP ports are something you'll need to factor in IF you have a Firewall in the path between the two offices.

[Nithin Eluvathingal]

As @Scott Leport mentioned, Cisco release  TCP and UDP Port Usage Guide for Cisco Unified Communications Manager versions. Refer the Guide related to your CUCM version.