HP StorageWorks Storage Mirroring for Linux User's Guide (T2558-96317, June 2009)

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Establishing a
Connection Across a
NAT or Firewall
If your source and target are on opposite sides of a NAT or firewall, you will need special
configurations to accommodate the complex network environment. Additionally, you must have the
hardware already in place and know how to configure the hardware ports. If you do not, see the
reference manual for your hardware.
In this environment, you must have static mapping where a single, internal IP address is always
mapped in a one-to-one coorelation to a single, external IP address. Storage Mirroring cannot handle
dynamic mappings where a single, internal IP address can be mapped to any one of a group of
external IP addresses managed by the router.
Verifying the Storage Mirroring port settings
Storage Mirroring uses specific ports for communication between the Storage Mirroring servers and
Storage Mirroring clients. In order to use Storage Mirroring through a NAT or firewall, you must first
verify the current Storage Mirroring port settings so that you can open the correct ports on your
hardware to allow Storage Mirroring machines to communicate with each other.
Using the following table, locate and record your port settings for each of the Storage Mirroring ports.
The port setting can be found in the following locations.
 Management Console—From the Management Console, select File, Options, and go to the
Configuration tab.
 Failover Control Center—From the Failover Control Center, select Settings,
Communications.
 Storage Mirroring server—From the Management Console, right-click on a server in the tree in
the left pane of the Management Console, select Properties, and go to the Network t a b .
Port Description
Default
Setting
Record
Your Port
Setting
Management Console
Status Transmit Port
The Status Transmit Port sends and receives
directed UDP comunications to display status
and statistics in the Management Console.
1505
Management Console
Heartbeat
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The Heartbeat Advertisment port sends and
receives broadcast UDP communications to
populate the Management Console tree with
Storage Mirroring servers.
1500
Failover Control
Center Service
Transmit Port
The Service Transmit Port sends and receives
TCP communication between Storage
Mirroring servers and between Storage
Mirroring servers and Storage Mirroring
clients.
1500
Failover Control
Center Heartbeat
Listen Port
The Heartbeat Listen Port send and receives
broadcast UDP communications to populate
the Failover Control Center with Storage
Mirroring servers.
1500