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:
]# nc -v lnxwaagt7 7520Ncat: Version 6.40 ( http://nmap.org/ncat )
Ncat: Connected to 10.242.33.90:7520.
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.