Load Balancing Craft CMS - Admin gets logged out instantly We are load balancing 2 servers hosting an identical Craft environment.

When clicking around in the admin a user will get logged out after 30 seconds and sometimes even faster when browsing in the admin panel.

I am unable to set the load balancer to sticky sessions due to the load balancer sitting behind a Firewall which NAT's inbound traffic. So the load balancer see's all inbound traffic as a single IP.

Is there anything else that can be done to resolve this issue?
If you can't enforce sticky sessions, then you'll need to provide a common place for all load balanced web server to save their PHP session files.

By default PHP session files are file based and saved to whatever path the php.ini session_save_path is set to.  You could change that to an NFS share path.

If you had an in-memory key=>value store (like Redis, Memcached, etc.) you could configure PHP to save its sessions there.

If you wanted something more persistent, you could configure PHP to save sessions in a database.

On top of that, if you're not using stick sessions, you'd want to set a consistent appId and validationKey across every web server so they can decrypt Craft/PHP cookies using the same tokens.