topic Re: Allow Multicast through firewall in Network Security

Allow Multicast through firewall

rsohi — Mon, 11 Mar 2019 10:34:07 GMT

Hello all, I require some assistance in regards to passing multicast traffic through a checkpoint firewall. We have a server which resides on a screened subnet behind a firewall on a 3750 running base image. It is the multicast source. The clients reside on the internal network. Now to allow multicast through this firewall is it as simple as allowing IGMP and allowing udp to the IP of the multicast group and the ports required? Do I have to worry about PIM? Does this make sense? Can someone help?

thx much,

Raj

Re: Allow Multicast through firewall

rsohi — Tue, 26 Jun 2007 16:51:40 GMT

Can anyone assist me with this please?

regards,

Raj

Re: Allow Multicast through firewall

rsohi — Fri, 07 Sep 2007 17:18:10 GMT

Does anyone have in any experience with this? Any help or direction would be greatly appreciated.

regards,

Raj

Re: Allow Multicast through firewall

rsohi — Thu, 15 Nov 2007 22:25:46 GMT

Hi Raj,

In order to make this work, the firewall must be capable of doing Pim. Pim has to be configured on the interfaces along with the rendevous point (RP). IGMP must be allowed to pass through the firewall as well. Then define the multicast address and what udp ports are required to pass through.

The switch was upgraded to the enhanced image. The rendevous point was defined along with PIM. PIM was also enabled on the interfaces requiring it.

regards,

Raj