Hi esbe.
To test LDAP/LDAPS, you can try PGP's public server.
Protocol: LDAP
Name: PGP public sever
Host: keyserver.pgp.com
You can leave SSL enabled for LDAPS, or disable it for LDAP.
Clicking save should test the connection and add the server.
To test HKP, you can try MIT's public server.
Protocol: HKP
Name: MIT public sever
Host: pgp.mit.edu
Disable SSL
Hope that helps, if it doesn't please contact us.
Thanks,
Ernesto