Creare iscsi target

Buongiorno a tutti!

E' da prima delle ferie che sbatto contro un muro nel tentativo di 
creare un server (target) iSCSI da usare come storage per la 
virtualizzazione.

Ho installato tgt e targetcli-fb, poi:
$ sudo targetcli
targetcli shell version 2.1.53
Copyright 2011-2013 by Datera, Inc and others.
For help on commands, type 'help'.

/> /backstores/block create name=oph-data dev=/dev/md0
Created block storage object oph-data using /dev/md0.
/> /iscsi create
Created target iqn.2003-01.org.linux-iscsi.ophnas.x8664:sn.46e1951acaca.
Created TPG 1.
Default portal not created, TPGs within a target cannot share ip:port.
/> 
/iscsi/iqn.2003-01.org.linux-iscsi.ophnas.x8664:sn.46e1951acaca/tpg1/acls 
create iqn.1993-08.org.debian:01:a**8
Created Node ACL for iqn.1993-08.org.debian:01:a**8
/> 
/iscsi/iqn.2003-01.org.linux-iscsi.ophnas.x8664:sn.46e1951acaca/tpg1/luns 
create /backstores/block/oph-data
Created LUN 0.
Created LUN 0->0 mapping in node ACL iqn.1993-08.org.debian:01:a**8
/> 
/iscsi/iqn.2003-01.org.linux-iscsi.ophnas.x8664:sn.46e1951acaca/tpg1/portals 
create
Using default IP port 3260
Binding to INADDR_ANY (0.0.0.0)
Could not create NetworkPortal in configFS
/> ls
o- / 
......................................................................................................................... 
[...]
   o- backstores 
.............................................................................................................. 
[...]
   | o- block 
.................................................................................................. 
[Storage Objects: 1]
   | | o- oph-data 
........................................................................ 
[/dev/md0 (58.2TiB) write-thru activated]
   | |   o- alua 
................................................................................................... 
[ALUA Groups: 1]
   | |     o- default_tg_pt_gp 
....................................................................... 
[ALUA state: Active/optimized]
   | o- fileio 
................................................................................................. 
[Storage Objects: 0]
   | o- pscsi 
.................................................................................................. 
[Storage Objects: 0]
   | o- ramdisk 
................................................................................................ 
[Storage Objects: 0]
   o- iscsi 
............................................................................................................ 
[Targets: 1]
   | o- iqn.2003-01.org.linux-iscsi.ophnas.x8664:sn.46e1951acaca 
.......................................................... [TPGs: 1]
   |   o- tpg1 
............................................................................................... 
[no-gen-acls, no-auth]
   |     o- acls 
.......................................................................................................... 
[ACLs: 1]
   |     | o- iqn.1993-08.org.debian:01:a**8 
............................................................... [Mapped 
LUNs: 1]
   |     |   o- mapped_lun0 
.............................................................................. 
[lun0 block/oph-data (rw)]
   |     o- luns 
.......................................................................................................... 
[LUNs: 1]
   |     | o- lun0 
................................................................... 
[block/oph-data (/dev/md0) (default_tg_pt_gp)]
   |     o- portals 
.................................................................................................... 
[Portals: 0]
   o- loopback 
......................................................................................................... 
[Targets: 0]
   o- vhost 
............................................................................................................ 
[Targets: 0]
   o- xen-pvscsi 
....................................................................................................... 
[Targets: 0]
/> 
/iscsi/iqn.2003-01.org.linux-iscsi.ophnas.x8664:sn.46e1951acaca/tpg1/portals 
create 0.0.0.0
Using default IP port 3260
Binding to INADDR_ANY (0.0.0.0)
Could not create NetworkPortal in configFS

Non ci sono portali definiti e non me ne fa creare... Any hint? Ho già 
provato a cancellare il portale su 0.0.0.0 ma ovviamente mi dice che non 
esiste...

Grazie