Hi Cisco SMEs,my problems has been raised problem has been raised before, sometime ago in 2017 see this Community post on "Defining custom PAM or protocol for ZBF", and here "IP Port map custom protocol in IOS XE".Both of these only identified that t...

Hi Cisco IOS SMEs, there have been some prior posts on this subject, but they are very old and relate to much less recent IOS versions:here: https://community.cisco.com/t5/firewalls/zbfw-quot-sip-protocol-violations-quot/m-p/1251998 I am running IOS ...

Hi IOS and CME users,I have got a simple CME configuration up and running on 2901, which supports:1. REGISTER & INVITE of SIP phones within LAN2. International Calling via external SIP Service Provider using "dial-peer" to SIP Trunk3. National & Loca...

Hi VoIPers & Sippers,After a false start I have now got a very basic CME configuration (with 2901) going which:1. Provides Internet Facing SIP Proxy2. Supports generic SIP clients (Mac OS X Blink & iPhone Acrobit/Groundwire and Grandstream GXV3175)3....