Video not working after linux update

Hi All,
yesterday I got few updates on my linux machines, I upgraded them to upgrade my packages, it took a long time to upgrade all of the packages. But since then I am not able to enable video calling on my asterisk. I have not changed my dial plan or anything, video is just stopped and not working at all.

Can any one please suggest what actually happened, is it any firewall setting or port which I need to enable/disable.

thanks in advance.