Communication Anomaly Occurs Between the Equipment and the NMS Due to the Setting of the Firewall

If the equipment and the NM server communicate unidirectionly, disable the firewall or antivirus software to restore the communication.

Product

• OptiX OSN 1500A/1500B
• OptiX OSN 2500
• OptiX OSN 3500
• OptiX OSN 3500 II
• OptiX OSN 7500

Fault Type

• DCN fault

Symptom

During the system commissioning, it is found that the NM server can communicate with the OptiX OSN equipment by using the ping command, but the PC used on the equipment side cannot communicate with the NMS.

Cause Analysis

The firewall or antivirus software is used on the NM server.

Procedure

1. Replace the NM server with a PC, and use the ping command to test the DCN. The result shows that the communication is normal.
2. Disable the firewall or antivirus software on the NM server. The equipment side can communicate with the NM server by using the ping command.

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