This scripts downloads the recommended Block List from the DShield.org page - and creates a BlackList file for use with Shorewall. If the Old list differs from the newly created - then shorewall will reload the list.

• Fetches the http://feeds.dshield.org/block.txt Recomended Blocklist and creates a shorewall-Blacklist.
• The Old used blacklist is moved to blacklist.old and used for comparison - if the new file is different, shorewall will reload the blacklist.
• The System handles errors as sensible as possible. If an error occurs - it bails out and send a note to the admin. Exception is the diff statement. (Have to handle it one day).