Technical Note: Communication failures with Persistent Agent 3x
Description
The Persistent Agent becomes hung and cannot establish communication.
Communication between a Persistent Agent and NAC is established by first securing the connection via SSL. There are times when the SSL connection may not complete. The agent waits indefinitely for the connection and eventually hangs.
Symptoms include the following on a given host:
Logged on User information not available
Scans do not run
Cannot send message
"Lost Contact with Persistent Agent" events
"Persistent Agent Scan Not Performed" events
Scope
Version: Agent 3.x and above
Solution
Workaround: Restart the host or the agent. Refer to related KB article below for instructions.
Solution: Addressed in agent version 5.0.2 and above. Refer to the latest Agent Release Notes and upgrade instructions.
The Persistent Agent becomes hung and cannot establish communication.
Communication between a Persistent Agent and NAC is established by first securing the connection via SSL. There are times when the SSL connection may not complete. The agent waits indefinitely for the connection and eventually hangs.
Symptoms include the following on a given host:
Logged on User information not available
Scans do not run
Cannot send message
"Lost Contact with Persistent Agent" events
"Persistent Agent Scan Not Performed" events
Scope
Version: Agent 3.x and above
Solution
Workaround: Restart the host or the agent. Refer to related KB article below for instructions.
Solution: Addressed in agent version 5.0.2 and above. Refer to the latest Agent Release Notes and upgrade instructions.
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