b.larik

If you’re like me and have several rails applications in different rails versions, it’s difficult to just run a gem cleanup, because it would mean all your old rails gems will also be deleted.

You don’t want that, but you also don’t want to clean them up one by one.

Here’s easy way to do it from your bash command line:

for g in $(sudo gem cleanup --dryrun \
   | awk '$1=="Dry" && $6!~/^(rails|action(mailer|webservice|pack)|active(resource|support|record))/ { print $6}' \
   | sed -E -e 's/-([0123456789].?)+$//g' \
   | sort --unique --ignore-case); do
      sudo gem cleanup $g
done

Just copy the code above in your terminal, make sure you’ve got sudo rights.

You might get warnings about dependencies, just say no and rerun the code if needed.

M0n0wall is firewall software based on a bare-bones version of FreeBSD.

The firewall is configured via PHP scripts.

Since I use SIP spoofing in combination with my ADSL connection. I need functionality which isn’t supported by m0n0wall out of the box.

Thanks to Maurice I found out how to make SIP spoofing work with m0n0wall. The solution is not 100%, because when the network interface goes down for a reason, the spoof settings won’t be restored. I decided to write a quick hack, so I can remotely run commands on m0n0wall.

It’s a ruby script which can be run from the command line.

Save the code below to a file named m0n0wall_exec.rb and, make it executable and change the follwing variables to satisfy your need:

• ssl : true for ssl mode false for no ssl
• url : the ip/host from your m0n0wall
• user : the username to access the webgui
• pass : the password to access the webgui

You can run commands like:

./m0n0wall_exec.rb "/sbin/ifconfig sis1" "ls /"

m0n0wall_exec.rb

#!/usr/bin/env ruby

require 'net/http'
require 'net/https'
begin 
   require 'rubygems'
   require 'html/htmltokenizer'
rescue
   require 'html/htmltokenizer'
end

# change here
ssl  = true
url  = '192.168.1.254'
user = 'admin'
pass = 'secret'

# Don't change below
port = ssl ? 443 : 80

http  = Net::HTTP.new(url,port)

if ssl
   http.use_ssl = true
   http.verify_mode = OpenSSL::SSL::VERIFY_NONE
end

http.start() {|http|
  req = Net::HTTP::Post.new('/exec.php')
  req.basic_auth(user, pass)

  ARGV.each { |cmd|
     req.set_form_data({'txtCommand' => cmd})
     response = http.request(req)
     toke = HTMLTokenizer.new(response.body) 
     toke.getTag("pre")
     puts toke.getText("form").chop.gsub(/\&lt\;/,'<').gsub(/\&gt\;/,'>')
   }
}

I’m NOT responsible for any damage this script can cause. And yes, the script will probably break when the HTML source changes of exec.php.