get number of active and allowed connections from a DD-WRT router

gistfile1.txt

#!/usr/bin/ruby

# get number of active and allowed connections from a DD-WRT router

require 'rubygems'
require 'net/ssh'

Net::SSH.start('192.168.0.1', 'root') do |ssh|
  max = ssh.exec!('cat /proc/sys/net/ipv4/netfilter/ip_conntrack_max').strip
  tcp = ssh.exec!('grep -c ^tcp /proc/net/ip_conntrack').strip
  udp = ssh.exec!('grep -c ^udp /proc/net/ip_conntrack').strip
  puts "#{udp}u+#{tcp}t/#{max}"
end