Code:
<address>192.168.0.18</address>
<localaddress>192.168.0.18</localaddress>
Change back to the way it was:
Code:
<!-- <address>do.not.edit</address> -->
<!-- <localaddress>do.not.edit</localaddress> -->
If I recall correctly, the IP in a -specified- "<address>" is the one sent to client. The client on anything but your LAN (thus your friend) would then have difficulty reaching the server on a private LAN IP.
I could be off, regardless, the lines shouldn't need defined (hence the comment in the stock eqemu_config.xml file (assuming you used Akka's installation package, which is of course the recommended method).