Here we will see how to install OpenSSL and TLS to be able to encrypt communication between
Tkabber and your server using the old SSL method or the new TLS if your server supports it.

1. Install OpenSSL

   • from source

     wget http://www.openssl.org/source/openssl-0.9.7d.tar.gz
     tar -xzvf openssl-0.9.7d.tar.gz
     cd openssl-0.9.7d
     ./config
     make
     make test
     make install

   • using apt

     apt-get install openssl libssl-dev

2. Install TLS for Tcl

   • from source

     Download it:

     wget http://unc.dl.sourceforge.net/sourceforge/tls/tls1.5.0-src.tar.gz
     tar -xzvf tls1.5.0-src.tar.gz
     cd tls1.5

     Now configure the compilation:

     • default
       

       ./configure

     • on Debian unstable
       

       ./configure --with-tcl=/usr/lib/tcl8.4/ --with-tclinclude=/usr/include/tcl8.4/ --with-ssl-dir=/usr/

     • on Debian Woody
       

       ./configure --with-tcl=/usr/lib/tcl8.3/ --with-tclinclude=/usr/include/tcl8.3/ --with-ssl-dir=/usr/

     Compile and install it:

     make
     make install

   • official binary on Linux x86

     Download it:

     wget http://belnet.dl.sourceforge.net/sourceforge/tls/tls1.5.0-linux-x86.tar.gz
     tar -xzvf tls1.5.0-linux-x86.tar.gz

     Now copy the files:

     cp -r tls1.5 /usr/lib
     mv /usr/lib/tls1.5/libtls1.50.so /usr/lib/

   • using apt on Debian unstable

     apt-get install tcltls

   Check it's installed:

   tclsh
   % package require tls
   1.50
   % exit

3. Configure Tkabber

   When Tkabber is able to load TLS it shows a new tab on the Login Window.
   Check the SSL option to use SSL or STARTTLS to use the new TLS system if your server suports it.

   You will probably want to configure Tkabber permanently to use SSL or TLS always.
   There are two methods:

   • Open Tkabber, open the Customize window, section 'Login', check the '::::loginconf(usessl):' option.
   • In your $HOME/.tkabber/config.tcl put this:

     hook::add finload_hook {
       set ::loginconf(usessl) 1
     }