Possible to install backup DNS or better backup whole ISPconfig server ?

[Snowman]

hi all,
i want to ask if it is possible to make backup server to my ISPconfig server ,
I need to backup DNS and storage (webs,mails) , so if the first server will fall down , the second server will continue ..
and if first server will be up the second server will only synchronizate with main (first server)

thnx for suggestions

[falko]

Regarding DNS: you should always have a secondary DNS server. This tutorial might help you: http://www.howtoforge.com/ispconfig_dns_godaddy

Regarding Postfix: you can set up a secondary MX: http://www.postfix.org/STANDARD_CONF...ME.html#backup