tsutton If you've set it up following the the post you mentioned, then memcached is not listening on a port at all. To connect to it you use the path to the filesystem socket as shown in the example, eg: unix:/home/user/apps/appname/memcached.sock
For PHP apps, the syntax for a socket connection might be different, I think something like unix:///home/user/apps/appname/memcached.sock:0
- check your application documentation for the specifics.