Tcp Port Numbers; Hafm Function With Rmi At Tcp Port Level; Hafm Appliance And Client Communications - HP 316095-B21 - StorageWorks Edge Switch 2/24 User Manual

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TCP port numbers

This section provides information about configuring TCP port numbers for remote management
interface (RMI) servers and registries to allow the HAFM client and server application to function
across firewalls.

HAFM function with RMI at TCP port level

The HAFM appliance communicates with clients through the RMI server
full-duplex function. However, the HAFM client must know the TCP/IP port number of the RMI server
on the HAFM appliance before they can communicate. The RMI registry communicates this TCP port
number to the HAFM client. The HAFM appliance obtains the TCP port number of the RMI Server on
the Client during initial communications.
HAFM appliance
RMI server
Figure 99

HAFM appliance and client communications

The TCP port numbers of the RMI server are randomly and automatically selected on both the HAFM
appliance and client as a full-duplex function. Firewalls are configured to block all unknown
incoming connections with no mapping of outgoing connections based on a socket part of TCP and
IP.
To work around this problem, administrators can configure the port numbers into appropriate batch
files, and then configure the firewall to unblock the configured port numbers. The procedure that you
follow depends on how the firewall is set up:
• If the firewall prevents the client from connecting to arbitrary ports on the server, then perform the
following procedures:
• "Forcing the RMI registry to use a specific
RMI registry
RMI servers's TCP/IP port #
RMI servers's TCP/IP port #
Full-duplex communication
HAFM client
RMI server RMI registry
port" on page 172
HA-Fabric Manager user guide 171
(Figure 99). This is a