One interesting thing that I noticed was that the local content filtering was already enabled as soon as I restored the backup. Searching inside the backup file, I found this
undefercontentmem sc_local_db� block_unscannable
/var/certcache
So it seems that the setings are carried over in the backup file [;)] Just a heads up to anyone else trying the install with the backup that has local db enabled.
More on how to enable local db can be found at http://www.astaro.org/astaro-gateway-products/web-security-http-https-ftp-im-p2p-web-filtering-antivirus/35399-web-proxy-local-content-filtering-database.html
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