<body><script type="text/javascript"> function setAttributeOnload(object, attribute, val) { if(window.addEventListener) { window.addEventListener('load', function(){ object[attribute] = val; }, false); } else { window.attachEvent('onload', function(){ object[attribute] = val; }); } } </script> <div id="navbar-iframe-container"></div> <script type="text/javascript" src="https://apis.google.com/js/plusone.js"></script> <script type="text/javascript"> gapi.load("gapi.iframes:gapi.iframes.style.bubble", function() { if (gapi.iframes && gapi.iframes.getContext) { gapi.iframes.getContext().openChild({ url: 'https://www.blogger.com/navbar.g?targetBlogID\x3d11356004\x26blogName\x3dxception\x26publishMode\x3dPUBLISH_MODE_BLOGSPOT\x26navbarType\x3dBLUE\x26layoutType\x3dCLASSIC\x26searchRoot\x3dhttps://openrent.blogspot.com/search\x26blogLocale\x3den_US\x26v\x3d2\x26homepageUrl\x3dhttp://openrent.blogspot.com/\x26vt\x3d-4655156434419967503', where: document.getElementById("navbar-iframe-container"), id: "navbar-iframe" }); } }); </script>

Setup Linux to VPN into work (using VPNC)

VPNC is an OSS alternative to the proprietary Cisco VPN client software. Cisco puts you through a nightmare of a registration process just to get their software. VPNC is a free, lightweight alternative that is just as good. To use this method, you must already have a valid VPN login. Here is how you install it on either CentOS or Fedora Core 3:

1) Install two missing libraries: libgpg-error-devel and libgcrypt-devel
yum install libgpg-error-devel
yum install libgcrypt-devel

2) Add /usr/lib and /usr/include to the /etc/ld.so.conf file. This file is a list of extra directories that the dynamic linker uses to search for shared libraries.

3) Run ldconfig

4) Create a file called /etc/vpnc.conf and enter this data into it:
IPSec gateway
IPSec secret
Xauth username

5) Download the latest version of the software (in tarball form) here: http://www.unix-ag.uni-kl.de/~massar/vpnc

6) Untar it into its own directory.

7) Change to the vpnc-0.3.3 directory, and run the "make" command to create the binaries. A few lines will scroll by showing you the build process with gcc.

8) Copy two binaries to a common location in your system's PATH:
cp vpnc vpnc-disconnect /usr/local/sbin

9) Create the directories /etc/vpnc and /var/run/vpnc
mkdir -p /etc/vpnc
mkdir -p /var/run/vpnc

10) Copy the vpnc-script file to /etc/vpnc
cp vpnc-script /etc/vpnc

Start the VPN client like this:
$ vpnc
Enter password for user@
VPNC started in background (pid: 5454)...

Stop the VPN client like this:
$ vpnc-disconnect
Terminating vpnc daemon (pid: 5454)