Automatic configuration backup on LTM box

You have basically two options:

1. Create a timed event on the local system that backs up the config. Thomas' crontab example is a frequently used option. You can also create an external monitor to do the same thing, and then tie the monitor to a "phantom" pool, a pool not bound to a VIP. This enables cron-like timed functionality, and is itself generally backed up with the config. Your script could very easily archive and SCP/FTP the archive off-box at regular intervals. You could even potentially monitor the config for significant changes and only archive it then.

    

2. Use an external management product like F5 Enterprise Manager or BIG-IQ. EM natively archives and stores remote LTM configurations, and can run in a VM.