Originally Posted by FNC
How is this related to Linux?
It isn't. The OP was given an answer here:
...but apparently decided that (instead of reading the manuals on their firewall, or looking up the L7 filter that was suggested), to come here and post the same question two more times.
OP, you were given the answer in your other thread. Either implement the L7 filter as you were led to, or read the manuals on your firewall yourself, instead of asking to be spoon-fed the answers