Hi

I am trying to search a firewall syslog space delimeted file for all of the different tcp and udp destination ports.
I know that grep will find lines that contain specific text. And I have tried using the the the cut command to cut out of the file certain colums. However the test I am looking for is not always in the same colum.

What I would like to do is search through many log files in a directory for the text string dst_port=*** where the *** would be a wild card so I can see every destination port that has been requested from the firewall logs.
Below is a snap shot of the text im trying to search through.
Any help would be appreciated.
Andy

src=10.217.162.99 dst=10.217.208.105 src_port=4218 dst_port=135 src-xlated ip=10.217.162.99 port=4218 dst-xlated ip=10.217.208.105 po
rt=135 session_id=247646 reason=Close - TCP FIN