Administrator Guide

Figure 8. iSCSI NAT Port Forwarding Diagram
Item Description
1 iSCSI initiator (server or remote Storage Center)
2 Router performing NAT/port forwarding
3 Storage Center
Configure NAT Port Forwarding for an iSCSI Fault Domain
Configure NAT port forwarding for a fault domain to make sure that control port redirection works correctly.
Prerequisites
When the router that performs NAT and port forwarding receives inbound iSCSI connections destined for the specified public IP
and public port, it forwards the connections to the private Storage Center iSCSI IP address and private port (by default, TCP
port 3260).
● The Storage Center iSCSI ports must be configured for virtual port mode.
● For each Storage Center iSCSI control port and virtual port, a unique public IP address and TCP port pair must be reserved
on the router that performs NAT.
● The router that performs NAT between the Storage Center and the public network must be configured to forward
connections destined for each public IP address and port pair to the appropriate Storage Center private iSCSI IP address and
appropriate port (by default, TCP 3260).
Steps
1. If you are connected to a Data Collector, select a Storage Center from the drop-down list in the left navigation pane of
Unisphere Central.
2. From the
SYSTEM menu, click Ports.
The Ports view is displayed.
3. Click the Front End Ports tab.
4. Expand iSCSI and click the fault domain link.
The Fault Domain view is displayed.
5. On the Summary tab, click
(More Actions) and select Configure NAT Port Forwarding.
The Configure NAT Port Forwarding dialog box opens.
6. In the Port Forwarding Configuration area, configure port forwarding information for a Storage Center iSCSI port.
a. Click Add.
The Create iSCSI NAT Port Forward dialog box opens.
b. From the Name drop-down menu, select the iSCSI control port or a physical port.
● Control ports are labeled with the name of the fault domain.
● Physical ports are labeled with a WWN.
c. In the Public IPv4 Address field, type the IPv4 address that iSCSI initiators (servers and remote Storage Centers)
communicate with on the public network to reach the Storage Center iSCSI port.
d. In the Public Port field, type the TCP port that iSCSI initiators communicate with on the public network to reach the
Storage Center iSCSI port.
e. Click OK.
The Create iSCSI NAT Port Forward dialog box closes.
7. Repeat the preceding steps for each additional iSCSI control port and physical port in the fault domain.
8. In the Public Networks/Initiators area, define an iSCSI initiator IP address or subnet that requires port forwarding to
reach the Storage Center because it is separated from the Storage Center by a router performing NAT.
Storage Center Maintenance
177