You are here: 2 Installation and Configuration > Initializing/Configuring Torque on the Server (pbs_server) > Configuring Ports

2.8 Configuring Ports

You can optionally configure the various ports that Torque uses for communication. Most ports can be configured multiple ways. The ports you can configure are:

pbs_server listening port
pbs_mom listening port
port pbs_server uses to communicate to the pbs_mom
port pbs_mom uses to communicate to the pbs_server
port client commands use to communicate to the pbs_server
port trqauthd uses to communicate to the pbs_server

If you are running PBS Professional on the same system, be aware that it uses the same environment variables and /etc/services entries.

2.8.1 Configuring the pbs_server Listening Port

To configure the port the pbs_server listens on, follow any of these steps:

Set an environment variable called PBS_BATCH_SERVICE_PORT to the port desired.
Edit the /etc/services file and set pbs port_num/tcp.
Start pbs_server with the -p option.
- Red Hat 6-based or SUSE 11-based systems
  - Edit /etc/sysconfig/pbs_server.
    PBS_ARGS="-p"
  - Start the service.
    service pbs_server start
- Red Hat 7-based or SUSE 12-based systems
  - Edit /etc/systemconfig/pbs_server.
    PBS_ARGS="-p"
  - Start the service.
    systemctl start pbs_server.service
Edit the $PBS_HOME/server_name file and change server_name to server_name:<port_num>
Start pbs_server with the -H option.
- Red Hat 6-based or SUSE 11-based systems
  - Edit /etc/sysconfig/pbs_server.
    PBS_ARGS="-H"
  - Start the service.
    service pbs_server start
- Red Hat 7-based or SUSE 12-based systems
  - Edit /etc/systemconfig/pbs_server.
    PBS_ARGS="-H"
  - Start the service.
    systemctl start pbs_server.service

2.8.2 Configuring the pbs_mom Listening Port

To configure the port the pbs_mom listens on, follow any of these steps:

Set an environment variable called PBS_MOM_SERVICE_PORT to the port desired.
Edit the /etc/services file and set pbs_mom port_num/tcp.
Start pbs_mom with the -M option.
- Red Hat 6-based or SUSE 11-based systems
  - Edit /etc/sysconfig/pbs_mom.
    PBS_ARGS="-M"
  - Start the service.
    service pbs_mom start
- Red Hat 7-based or SUSE 12-based systems
  - Edit /etc/systemconfig/pbs_mom.
    PBS_ARGS="-M"
  - Start the service.
    systemctl start pbs_mom.service
Edit the pbs_server nodes file to add mom_service_port=port_num.

2.8.3 Configuring the Port pbs_server Uses to Communicate with pbs_mom

To configure the port the pbs_server uses to communicate with pbs_mom, follow any of these steps:

Set an environment variable called PBS_MOM_SERVICE_PORT to the port desired.
Edit the /etc/services file and set pbs_mom port_num/tcp.
Start pbs_mom with the -M option.
- Red Hat 6-based or SUSE 11-based systems
  - Edit /etc/sysconfig/pbs_mom.
    PBS_ARGS="-M"
  - Start the service.
    service pbs_mom start
- Red Hat 7-based or SUSE 12-based systems
  - Edit /etc/systemconfig/pbs_mom.
    PBS_ARGS="-M"
  - Start the service.
    systemctl start pbs_mom.service

2.8.4 Configuring the Port pbs_mom Uses to Communicate with pbs_server

To configure the port the pbs_mom uses to communicate with pbs_server, follow any of these steps:

Set an environment variable called PBS_BATCH_SERVICE_PORT to the port desired.
Edit the /etc/services file and set pbs port_num/tcp.
Start pbs_mom with the -S option.
- Red Hat 6-based or SUSE 11-based systems
  - Edit /etc/sysconfig/pbs_mom.
    PBS_ARGS="-S"
  - Start the service.
    service pbs_mom start
- Red Hat 7-based or SUSE 12-based systems
  - Edit /etc/systemconfig/pbs_mom.
    PBS_ARGS="-S"
  - Start the service.
    systemctl start pbs_mom.service
Edit the nodes file entry for that list: add mom_service_port=port_num.

2.8.5 Configuring the Port Client Commands Use to Communicate with pbs_server

To configure the port client commands use to communicate with pbs_server, follow any of these steps:

Edit the /etc/services file and set pbs port_num/tcp.

Edit the $PBS_HOME/server_name file and change server_name to server_name:<port_num>

2.8.6 Configuring the Port trqauthd Uses to Communicate with pbs_server

To configure the port trqauthd uses to communicate with pbs_server, do the following:

Edit the $PBS_HOME/server_name file and change server_name to server_name:<port_num>

2.8.7 Changing Default Ports

This section provides examples of changing the default ports (using non-standard ports).

In this section:

2.8.7.A MOM Service Port
2.8.7.B Default Port on the Server
2.8.7.C MOM Manager Port

2.8.7.A MOM Service Port

The MOM service port is the port number on which MOMs are listening. This example shows how to change the default MOM service port (15002) to port 30001.

Do the following:

On the server, for the server_priv/nodes file, change the node entry.
```
nodename np=4 mom_service_port=30001
```
On the MOM, start pbs_mom with the -M option.
- Red Hat 6-based or SUSE 11-based systems
  - Edit /etc/sysconfig/pbs_mom.
    PBS_ARGS="-M"
  - Start the service.
    service pbs_mom start
- Red Hat 7-based or SUSE 12-based systems
  - Edit /etc/systemconfig/pbs_mom.
    PBS_ARGS="-M"
  - Start the service.
    systemctl start pbs_mom.service

2.8.7.B Default Port on the Server

Do the following:

Set the $(TORQUE_HOME)/server_name file.
```
hostname:newport
numa3.ac:45001
```
On the MOM, start pbs_mom with the -S option.
- Red Hat 6-based or SUSE 11-based systems
  - Edit /etc/sysconfig/pbs_mom.
    PBS_ARGS="-S"
  - Start the service.
    service pbs_mom start
- Red Hat 7-based or SUSE 12-based systems
  - Edit /etc/systemconfig/pbs_mom.
    PBS_ARGS="-S"
  - Start the service.
    systemctl start pbs_mom.service

2.8.7.C MOM Manager Port

The MOM manager port tell MOMs which ports on which other MOMs are listening for MOM-to-MOM communication. This example shows how to change the default MOM manager port (15003) to port 30002.

Do the following:

On the server nodes file.
```
nodename np=4 mom_manager_port=30002
```
On the MOM, start pbs_mom with the -R option.
- Red Hat 6-based or SUSE 11-based systems
  - Edit /etc/sysconfig/pbs_mom.
    PBS_ARGS="-R"
  - Start the service.
    service pbs_mom start
- Red Hat 7-based or SUSE 12-based systems
  - Edit /etc/systemconfig/pbs_mom.
    PBS_ARGS="-R"
  - Start the service.
    systemctl start pbs_mom.service