Protecting Voice Media and Signaling Traffic
There is two types of security that you can enable with Call Manager Mixed mode : In this mode, depending the security configured on each phone, you can have secure calls when both devices are...
read moreManaging Certificates in an IPT network
Typically , in a PKI, there is a singme Certificate Authority (CA) or hierarchy of CA to issue certificates. However, several other elements can play this role too: Self-signed certificates : These...
read moreIPT Authentication and Encryption
All IPT devices as Call Manager, IP phones and voice gatewats can be configured to authenticate and encrypt voice signaling and media traffic. Phones can also be configured to authenticate phone...
read moreMCS OS Hardening
Call Manager 4.X runs on a Windows 2000 platform and this is important to ensure that the MCS OS is properly hardened so that it can’t be attacked and compromised. One of the first things to...
read moreDHCP Snooping
IP Phones as PC can use the DHCP to retrieve an IP configuration(IP Address, netmask, default gateway, DNS, TFTP, …). therefore, if an attacker is able to interfere with DHCP, he might be able...
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