Network equipment may terminate TCP connections after a period of inactivity. Vulcan's gateway uses autossh, which by default sends a keepalive signal every 10 minutes. If the network equipment is configured to timeout before this duration, it can lead to network disconnections.
Steps to Change the Default SSH Keepalive Time:
Log In to the Gateway Machine:
Access the gateway machine where you need to change the keepalive settings.
Edit the Configuration File:
Open the
/etc/rc.localfile for editing. This file contains startup commands that are executed when the machine boots.
Modify the Keepalive Setting:
Add the following line to the file before any command that starts with
autossh:export AUTOSSH_POLL=180
Replace
180with the desired number of seconds for the keepalive interval. This value should be less than the timeout period set on your network equipment.
Reboot the Machine:
After saving the changes, reboot the machine to apply the new configuration. This ensures that the updated keepalive setting takes effect.
Note: It's important to choose a keepalive interval that is appropriate for your network environment. Setting it too low might result in unnecessary network traffic, while setting it too high might not prevent disconnections effectively.