I am looking for SIP gateway security best practices as well as CME and UC520 when they work with SIP service provider. I'll be very appreciated if you provide the doc or link to show security best practices.
You're more likely to have toll fraud by having an open public IP address port 5060 than you are anything else. Of all the security issues I've seen people experience, nearly every one of them has been because of this.
Government and other people with more regulation will sometimes be forced to use SRTP, but it is rarely worth the hassle and added complexity.
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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 ...