iBlockList to IPTables

#!/bin/bash

# Blacklist's names & URLs arrays
bl_name=([0]='spyware')
bl_url=([0]='http://list.iblocklist.com/?list=bt_spyware&fileformat=p2p&archiveformat=gz')
bl_name=(${bl_name[*]} [1]='webexploit')
bl_url=(${bl_url[*]} [1]='http://list.iblocklist.com/?list=ghlzqtqxnzctvvajwwag&fileformat=p2p&archiveformat=gz')
bl_name=(${bl_name[*]} [2]='spider')
bl_url=(${bl_url[*]} [2]='http://list.iblocklist.com/?list=bt_spider&fileformat=p2p&archiveformat=gz')
bl_name=(${bl_name[*]} [3]='hijacked')
bl_url=(${bl_url[*]} [3]='http://list.iblocklist.com/?list=bt_hijacked&fileformat=p2p&archiveformat=gz')
bl_name=(${bl_name[*]} [4]='dshield')
bl_url=(${bl_url[*]} [4]='http://list.iblocklist.com/?list=bt_dshield&fileformat=p2p&archiveformat=gz')
bl_name=(${bl_name[*]} [5]='bogon')
bl_url=(${bl_url[*]} [5]='http://list.iblocklist.com/?list=bt_bogon&fileformat=p2p&archiveformat=gz')

# For each blacklist set above
for i in {0..5}; do
    # Download blacklist
    wget --output-document=/tmp/blacklist_${bl_name[$i]}.gz -w 3 ${bl_url[$i]} -q

    # Delete current iptables chain link
    iptables -D INPUT -j ${bl_name[$i]}
    # Flush current iptables chain
    iptables -F ${bl_name[$i]}
    # Delete current iptables chain
    iptables -X ${bl_name[$i]}
    # Create current iptables chain
    iptables -N ${bl_name[$i]}
    # Link current iptables chain to INPUT chain
    iptables -A INPUT -j ${bl_name[$i]}

    # Read blacklist
    while read line; do
        # Drop description, keep only IP range
            ip_range=`echo -n $line | sed -e 's/.*:\(.*\)-\(.*\)/\1-\2/'`;
        # Test if it's an IP range
        if [[ $ip_range =~ ^[0-9].*$ ]]; then
            # Add to the blacklist
            iptables -A ${bl_name[$i]} -m iprange --src-range $ip_range -j DROP
        fi
    done < <(zcat /tmp/blacklist_${bl_name[$i]}.gz | iconv -f latin1 -t utf-8 - | dos2unix)
done

# Delete files
rm /tmp/blacklist*

exit 0