1. working network (wireless card is running and VPN server is reachable for example) (required)
2. KDE >= 3.3.x (KDE3 version)/>= 4.1.x (KDE4 version) (required)
3. GNU libgcrypt (required)

• Cisco VPN
  • vpnc >= 0.2-rm+zomb-pre9 (optional)



• IPsec
  • FreeS/WAN (IPSec) 1.x or 2.x (2.x recommended) (optional)
    1. Linux 2.4
    2. kernel with FreeS/WAN patches
  • strongSwan (IPSec) (optional)
    1. Linux 2.4
    2. Linux 2.6
  
  
  
  • Openswan (IPSec) (optional)
    1. Linux 2.4
    2. Linux 2.6
  
  
  
  • ipsec-tools (optional)
    1. Linux 2.6/BSD



• PPTP
  • pptpclient (optional)
    1. pppd
    2. kernel with MPPE support



• SSL-based
  • OpenVPN 1.x or 2.x (2.x recommended) (optional)
    1. OpenSSL
  • Vtun (optional)
    1. OpenSSL
• L2TP
  
  (only one is needed)
  • pppd
  • l2tpd >= 0.69 (used at L2TP over IPSec)
  • xl2tpd 1.2.x (used at L2TP over IPSec)
  • openl2tp >= 0.19 (used at L2TP over IPSec)
• SSH
  • OpenSSH (optional)
    • OpenSSH (>= 4.3)
• Opensc
  • Opensc (for smartcard support)

• KDE3 version:

  Requirements for building:

  • qt3 development files (libqt3-mt-dev)
  • kdelibs development files (kdelibs-dev)
  • autoconf
  • automake
  • make

  Enter the following commands in console:

  tar xvfz kvpnc-<version>.tar.gz

cd kvpnc-<version>

make -f admin/Makefile.common

./configure

make

su

make install

exit
• KDE4 version:

  Requirements for building:

  • qt4 development files (libqt4-dev)
  • kdelibs development files (kdelibs-dev)
  • cmake

  Enter the following commands in console:

  tar xvfz kvpnc-<version>-kde4.tar.gz

cd kvpnc-<version>-kde4

cmake .

make

su

make install

exit
  
  
  

  Enter the following commands in console for building locale files:

  tar xvfz kvpnc-<version>-kde4-locale.tar.gz

cd kvpnc-<version>-kde4-locale

cmake .

make

su

make install

exit

If there is a binary package for your distribution, its the easiest way.

• Debian: su -c dpkg -i <package>
• rpm based: su -c rpm -i <package>
• Gentoo: emerge kvpnc