Issue: Moab client commands on the server function properly, but return an authentication error on the login nodes.
Symptom:
[root@loginnode1 ~]# showq
ERROR: server rejected request - could not authenticate client
ERROR: remote server rejected request, message 'invalid key for client 'root' - expecting key F...' (hostname:port=moab-headnode:42559)
Solution:
Make sure to copy $MOABHOMEDIR/etc/.moab.key from the headnode to the same place on the login nodes.