Depending on your hardware and software configuration, you may experience Putty connectivity issues. For example, some types of firewalls may close connections after a certain amount of time has elapsed.
If you experience connectivity issues, you can adjust PuTTY’s configuration to help keep connections alive. To do this, follow these steps:
- Start PuTTY.
- Load your connection session.
- In the Category pane, click Connection.
- Under Sending of null packets to keep session active, in the Seconds between keepalives, type 240.
With this configuration, PuTTY sends a packet to the server every 240 seconds (4 minutes) to keep the connection alive.