ubuntu

As of this post the current version of nmap in the ubuntu repositories is 4.76. Here are the steps I used to install the new version 5.0 on Ubuntu Jaunty 9.04.

sudo aptitude install build-essential
sudo apt-get install libssl-dev
mkdir src
cd src
wget -c http://nmap.org/dist/nmap-5.00.tar.bz2
bzip2 -cd nmap-5.00.tar.bz2 | tar xvf -
cd nmap-5.00/
./configure
make
sudo make install

To run go to Applications > Internet > Zenmap (as root).

Here is a case study of how stunnel can be used to test an SSL based protocol. We will create an stunnel configuration that reroutes the IMAP port (TCP 143) to the Secure IMAP port (TCP 993) on GMail's IMAP server (imap.gmail.com). We will than test the setup by using telnet.

I will be using Ubuntu 8.10 (Intrepid Ibex).

First, let's install stunnel.

sudo apt-get install stunnel

Edit /etc/default/stunnel4, change ENABLED=0 to ENABLED=1