MariaDB Galera does not accept remote connections

Ok - I am still scratching my head because I keep thinking it can't be, it's me, I am missing something very, very silly.

Anyway - I have installed MariaDB Galera 5.5.33a and I have setup a three node cluster. The environment is 3 Ubuntu servers 13.10 64 bit with 3 or 4 adapters, depending on the node (see attachment).

Galera replication works, 3306 is open, but I cannot connect to a DB from a remote client.

I thought there was something missing at OS level, so I installed a MariaDB 5.5.33 NO Galera, and it works with NO problems.