I have a question with regard to what ports should be open on firewall to allow voice call through.
For example I have two offices one in Sydney and one in Melbourne. The call manager is in sydney. Both offices has pix firewall. Now if sydney office has to make a call to Melbourne office, the Sydney office firewall will allow to pass the voice call as it is going from inside to outside. How about Melbourne office firewall. What need to be done on that firwall to allow a call from outside (Sydney) to inside. If the answer is to open ports from 16XXX to 32XXX, is it not a big threat to the network or is there is any other way to do it.
Below is a document which describes how to use application inspection to avoid opening a range of ports as you have described above. Application inspection can open ports dynamically based on a given protocols needs. Take a look at the section called Configuring Application Inspection (Fixup). Here you will see sections for SCCP, MGCP, H.323, etc.
The short answer is that you don't.... That isn't entirely true while at
the same time it kind of is, but for the most part you don't configure
the softkeys. You enable or disable them via TCL. Here is the long
answer. Be sure to read the whole thing or e...
Topology: IP Phone > Switches > Microsoft NPS setup to forward 802.1x
proxy to > ISE 2.1 patch 3 Authentication: EAP-TLS using Cisco MIC SANs
Phone Models 802.1X support? 802.1x flavor Addtl Comment EAP-MD5 EAP-TLS
Cisco 3905 Y Y N Cisco 6911 Y Y N Cisco ...
This document describe how DST changes and how time changes are
implemented in DST. Daylight Saving Time (DST) is the practice of
setting the clocks forward 1 hour from standard time during the summer
months, and back again in the fall, in order to make b...