[mdlug] iptables l7 filter

[Stan Green]

I have recently added steaming video to my web server. It is running rtsp on 
port 554. All is working fine. However, many companies block ports like 554. 
So my thought is to allow it to accept traffic on port 80, which most 
companies allow,  and inside the box route the traffic to 554. I also have a 
web server on the box, so I cannot route all traffic. 

In steps iptables and the l7 filter. (http://l7-filter.sourceforge.net/HOWTO) 
Using this filter, I think I should be able to route rtsp traffic to port 
554. 

Has anyone use l7 with iptables to do something like this. 

Is there a better way, assume 1 box and 1 ip address with multiple host names, 
to accomplish this same thing?

Thanks,
Stan Green