Speaking from experience, make sure that you enable the IOS firewall to prevent inbound SIP connections to the CCME, or at least limit them to authorised sources.
As soon as you enable Voicemail (for example), this enables SIP on CCME. If unprotected by a firewall config, the CCME system can then be hacked (following a port scan on 5060) and assuming they guess your Dial-Peer digits (usually 9 in the UK) then they can commit toll fraud and make calls via your system.
We are presently in discussuin with our CAM regards this.
SIP traces provide key information in troubleshooting SIP Trunks, SIP
endpoints and other SIP related issues. Even though these traces are in
clear text, these texts can be gibberish unless you understand fully
what they mean. This document attempts to br...
Please find the attached HTML document, download and open it on your PC.
This provides an easy to use form where you simply answer a few
questions and it will render the proper jabber-config.xml file for you
to copy/paste. There is built in logic to verif...
CUCM Database Replication is an area in which Cisco customers and
partners have asked for more in-depth training in being able to properly
assess a replication problem and potentially resolve an issue without
involving TAC. This document discusses the bas...