After you restart a Linux Endpoint Server, agents may not connect to the Endpoint Server. If this occurs, you can confirm the error in endpoint agent logs (edpa_ext0.log). This file will list libcurl error 60 related to Endpoint Server connection failure. You can also review the aggregator logs on the Endpoint Server which will display the following message: IOException while trying to initialize the transport layer.
Agents cannot reconnect to the Endpoint Server because Linux forbids non-root processes from binding to ports below 1024.
To ensure that agents can connect to Endpoint Servers: