In particular, communication between the HP Operations management server and managed nodes must not use port 135.
This behavior can be achieved by setting certain variables in the opcinfo file on the HP Operations managed nodes and the registry on the HPOM for Windows management server.
To implement this, the HP Operations RPC servers must use specific ports, which can be configured by the customer. The RPC servers and clients will read these ports from configuration files and RPC clients will directly contact the HP Operations RPC servers using the specified ports, without using the DCE endpoint mapper.
NOTE:
Variables used in the registry have the same names as the ones used
in the opcinfo
file, except that the prefix
OPC_
is omitted. There are variable names such as
OPC_COMM_PORT_RANGE
throughout this document - the
prefix OPC_
in italics means that the
variable used in the opcinfo
file is called
OPC_COMM_PORT_RANGE
, whereas the variable used in the
registry is called COMM_PORT_RANGE
.
A comparison of both models is shown below:
Behavior with DCE RPC endpoint mapper
OPC_COMM_PORT_RANGE
or it will
get a free port assigned. The RPC server registers itself with this
port at the endpoint mapper.Behavior without DCE RPC endpoint mapper
OPC_COMM_PORT_RANGE
. It does not
register itself at the endpoint mapper (switched off using
OPC_COMM_REGISTER_RPC_SERVER FALSE
) and
listens at this port (A).OPC_COMM_LOOKUP_RPC_SRV FALSE
). It reads the
port of the RPC server either from a variable in the opcinfo file
directly or reads it from a server port specification file
specified in the variable OPC_COMM_RPC_PORT_FILE
“…”
(B).NOTE:
Mixed environments are also possible, where some RPC clients are
using the endpoint mapper, and other clients do not. For example,
RPC clients (=nodes) inside the firewall could use the RPC endpoint
mapper lookup (because they do not have to cross the firewall),
whereas RPC clients (=nodes) outside the firewall do not use the
endpoint mapper. This can be controlled using the
OPC_COMM_LOOKUP_RPC_SRV
variable.
In such a mixed scenario it would be necessary to register the HP
Operations management server RPC server at the endpoint mapper, so
that the nodes inside the firewall can find the server.
This can be controlled using the
OPC_COMM_REGISTER_RPC_SERVER
variable.
Related Topics: