I am on GPL version and have got fully tuned and perfectly working Centos server with Virtualmin/Webmin on it. Is it possible (is there a solution, maybe built-in feature I don't know about in this product?) to have another one (I mean server) - just for backup purposes or to increase stability (like "one server is down, the other one is still running" with the exact same content). What is the best solution here - by making scheduled backups (settings, domains, full filesystem?) to each other's ftp every night or so? Then if the one is down - the other one can be simply restored manually from the files and settings uploaded. Thanks.