Unable to connect agent with Scheduler

Document ID : KB000102689
Last Modified Date : 19/06/2018
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After a newly installed agent has been introduced to the environment, it is unable to communicate with the scheduling engine.
How can we determine if a firewall port is allowing traffic between the agent and scheduler?
Workload Automation AE or Workload Automation DE running on Linux OS
Most organizations do not allow for telnet communications to be enabled by default. One can perform the following tests to ensure that communications over ports:

nc -v <hostname> <port>

For Example, to validate communications on the default agent port of 7520 from your scheduler (AE, DE), you would issue the command string as follows:

From the scheduler server:
nc -v lnxwaagt7 7520

Provided the agent service is up and running on the agent noted above, you should receive a response indicating that we connected. It should look something like this:

[root@lnxwaae01]# nc -v lnxwaagt7 7520
Ncat: Version 6.40 ( http://nmap.org/ncat )
Ncat: Connected to

If you do not receive the above response, then it is likely that either the agent process is down or the communication port is blocked by a firewall. Consult your network administrator as well as your System Administrator (in case a locally installed firewall is running) for assistance in resolving the communication.