How to manually uninstall IP tunneling on MacOSX

Description:

1. Start a Terminal Window (Application -> Utilities)
2. Become root
3. Run

   /System/Library/StartupItems/ag_iptd/ag_iptd stop
   

   It will kill the ag_iptd process and unload the driver from the kernel.
   
   If that fails kill the ag_iptd process manually and unload the driver:

   ps auxww | grep ag_iptd       # To find the process id
   kill the-processs-id	      # Replace with the process id 
   kextunload /System/Library/Extensions/tap.kext	    
   

4. To remove files and directories that has to do with the IP Tunneling Driver do:

   rm -rf /System/Library/Extensions/tap.kext
   rm -rf /System/Library/StartupItems/ag_iptd
   rm -rf /usr/local/libexec/ag_iptd