auth.conf

[AuthGroup1]
    Comment "AuthGroup1"
    Auth "proba" "qwert12345asdfg"


istgt.conf

[Global]
  Comment "Global section"
  NodeBase "iqn.2007-09.jp.ne.peach.istgt"
  PidFile /var/run/istgt.pid
  AuthFile /etc/istgt/auth.conf
  MediaDirectory /tmp
  LogFacility "local7"
  Timeout 30
  NopInInterval 20
  DiscoveryAuthMethod Auto
  MaxSessions 16
  MaxConnections 4
  FirstBurstLength 65536
  MaxBurstLength 262144
  MaxRecvDataSegmentLength 262144

[UnitControl]
  Comment "Internal Logical Unit Controller"
  AuthMethod CHAP
  Portal UC1 127.0.0.1:3261
  Netmask 127.0.0.1

[PortalGroup1]
  Comment "SINGLE PORT TEST"
  #Portal DA1 [2001:03e0:06cf:0003:021b:21ff:fe04:f405]:3260
  #Server IP
  Portal DA1 172.16.200.201:3260

[InitiatorGroup1]
  Comment "Initiator Group1"
  InitiatorName "ALL"
  #Client netmask
  Netmask 172.16.200.0/24

[LogicalUnit1]
  Comment "Hard Disk Sample"
  TargetName disk1
  TargetAlias "Data Disk1"
  Mapping PortalGroup1 InitiatorGroup1
  AuthMethod CHAP
  AuthGroup AuthGroup1
  UnitType Disk
  QueueDepth 32
  LUN0 Storage /dev/sdb 500M