Hi,
To open a port on the Firewall (assuming that for inbound traffic) you need two things:
1. The ACL allowing the traffic
2. A static NAT to allow the service to be reachable from the outside world
So, using the CLI you can do this:
sh run access-group --> to check which ACL is applied to the outside interface (in the inbound direction)
sh run access-list --> to check the statements in that ACL
access-list permit tcp any host x.x.x.x eq 52199
The above command allows TCP port 52199 from any outside source to internal x.x.x.x (static NAT IP for the internal host).
To check that is working just fo ''sh access-list'' and see if the above line is getting hitcounts.
Hope it helps.
Federico.