Network Wizard: How to install VPN Client on Ubuntu 10.04

I was trying to install Cisco VPN client to enable my laptop -which is runing on Ubuntu 10.04- to allow this machine connect to my office via VPN.

I got several error messages when I tried to compile this application.

Fortunately, I found the page below.

Thanks to L.A.M.N.K for documenting the step-by-step so that I'm now able to use Cisco VPN client on

my Ubuntu.

First, download the source from the tuxx website.

Then, follow the steps that I copied and pasted from the L.A.M.N.K below

Cisco module again doesn’t let us compile against the new kernel in Ubuntu 9.04 and 9.10 beta:

/home/lamnk/vpnclient/interceptor.c: In function ‘interceptor_init’: /home/lamnk/vpnclient/interceptor.c:132: error: ‘struct net_device’ has no member named ‘hard_start_xmit’ /home/lamnk/vpnclient/interceptor.c:133: error: ‘struct net_device’ has no member named ‘get_stats’ /home/lamnk/vpnclient/interceptor.c:134: error: ‘struct net_device’ has no member named ‘do_ioctl’ /home/lamnk/vpnclient/interceptor.c: In function ‘add_netdev’: /home/lamnk/vpnclient/interceptor.c:271: error: ‘struct net_device’ has no member named ‘hard_start_xmit’ /home/lamnk/vpnclient/interceptor.c:272: error: ‘struct net_device’ has no member named ‘hard_start_xmit’ /home/lamnk/vpnclient/interceptor.c: In function ‘remove_netdev’: /home/lamnk/vpnclient/interceptor.c:294: error: ‘struct net_device’ has no member named ‘hard_start_xmit’ make[2]: *** [/home/lamnk/vpnclient/interceptor.o] Error 1 make[1]: *** [_module_/home/lamnk/vpnclient] Error 2 make[1]: Leaving directory `/usr/src/linux-headers-2.6.31-1-generic' make: *** [default] Error 2 Failed to make module "cisco_ipsec.ko".

Before installtion I assume that you have the latest version 4.8.02.0030 and the required packages for compiling ie gcc, libstdc++6 … The kernel version should be from 2.6.30 to 2.6.32

Download the client and extract it
Go to vpnclient folder:
cd vpnclient
Download patch file for 64 bit and apply it (users on 32bit systems can skip this step):
wget http://lamnk.com/download/vpnclient-linux-4.8.02-64bit.patch
patch < ./vpnclient-linux-4.8.02-64bit.patch
sed -i 's/^CFLAGS/EXTRA_CFLAGS' Makefile
Download patch file for newer kernel (2.6.30+) and apply it:
wget http://lamnk.com/download/vpnclient-linux-2.6.31-final.diff
patch < ./vpnclient-linux-2.6.31-final.diff
Next we must edit a kernel source file
sudo sed -i 's/const\ struct\ net_device_ops\ \*netdev_ops;/struct\ net_device_ops\ \*netdev_ops;/' `find /usr/src -name netdevice.h`
Yes, it is a one liner, you should copy & paste that command instead of typing The command's translation into English: find the string const struct net_device_ops *netdev_ops; and change it to struct net_device_ops *netdev_ops; in the file locates at
find /usr/src -name netdevice.h
And finally, install Cisco VPN Client:
sudo ./vpn_install