What do I need to do for the ICQ Video to work behind a firewall?
The ICQ Video feature is designed to automatically work with most domestic firewalls and routers without any configuration, since most of them allow outgoing UDP packets by default.
However, some firewalls (especially corporate firewalls), are configured to block all outgoing UDP traffic. For the ICQ Video feature to work with such firewalls, they need to be configured to allow outgoing UDP packets from a specific port range; starting from 5190 and up.
Chances are that they will find available UDP ports in the 5190-5200 range, therefore it is recommended to enable outgoing UDP packets in this range.
The wider the port range, the greater the chance that the ICQ Video feature will work behind the firewall.
Note that port-forwarding (static port mapping) is not generally required.
However, some types of personal routers may require setting of static mapping of these local ports.