display banned IPs in iptable

#!/usr/bin/ruby

# f2b.rb
# F2B a simple script to display banned IPs in iptables
#
# Notice: you need to have figlet installed on your system
#         $ sudo apt-get install figlet

require 'terminal-table'
require 'colorize'

def iptables_to_array
  res = %x(iptables -L -n) #Fetch iptables rules
  arr = []
  res.each_line{|s| arr << s[/\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}/]} #Get ips in each lines
  arr.reject! { |e| e.to_s.empty? } #We delete nil or empty values
  arr.delete("0.0.0.0") #We do not banned all the world ;-)
  return arr.uniq! #And finally we do want only unique IPs
end

#### THIS BEGINS

puts %x(figlet "Banned!")

arr = iptables_to_array

puts "Currently we banned ".colorize(:color => :black, :background => :yellow) +
     arr.count.to_s.colorize(:color => :white, :background => :red) +
     " IP's!!!".colorize(:color => :black,:background => :yellow) + "\n"

# We display Ips in a fancy table
table = Terminal::Table.new
table.headings = ["All 0f FaMe".yellow]
arr.each do |ip|
  table.add_row [ip]
end

puts table