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With kernel 2.6.24 you will need a patch to install Cisco VPN Client

 

UPDATE: A new client for linux (4.8.02.0030) is out. You no longer need the patch for 2.6.24+ kernel on 32 bit systems. However a patch for 64 bit systems is still required. Please click on the link right below to see the howto for 64bit.

UPDATE: 64 bit systems are a bit more complicated, please see how to install Cisco VPN on Hardy Heron 8.04 64 bit

UPDATE: with 2.6.25 kernel this patch is still required (luckily)

OK it’s not breaking news anymore, but in case you confront these errrors:

make -C /lib/modules/2.6.24-ARCH/build SUBDIRS=/usr/src/vpnclient modules
make[1]: Entering directory `/usr/src/linux-2.6.24-ARCH’
CC [M] /usr/src/vpnclient/linuxcniapi.o
In file included from /usr/src/vpnclient/Cniapi.h:15,
from /usr/src/vpnclient/linuxcniapi.c:31:
/usr/src/vpnclient/GenDefs.h:113: error: conflicting types for ‘uintptr_t’
include/linux/types.h:40: error: previous declaration of ‘uintptr_t’ was here
make[2]: *** [/usr/src/vpnclient/linuxcniapi.o] Error 1
make[1]: *** [_module_/usr/src/vpnclient] Error 2
make[1]: Leaving directory `/usr/src/linux-2.6.24-ARCH’
make: *** [default] Error 2

Then you probably need a patch:

cd /path/to/the/vpnclient/folder
wget http://projects.tuxx-home.at/ciscovpn/patches/vpnclient-linux-2.6.24-final.diff
patch < ./vpnclient-linux-2.6.24-final.diff

This is due to a change in 2.6.4 kernel that the “init_net” symbol is now again exported using EXPORT_SYMBOL() instead of EXPORT_SYMBOL_GPL()

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  • ios46

    Patching works NOW with vpnclient-linux-x86_64-4.8.01.0640-k9.tar.gz instead of the old vpnclient-linux-4.8.00.0490-k9.tar.gz, :-) Great help people !!!

  • maleante

    the patch work fine for me, but when I try to install I keep getting the following error.

    Cisco Systems VPN Client Version 4.8.01 (0640) Linux Installer
    Copyright (C) 1998-2006 Cisco Systems, Inc. All Rights Reserved.

    By installing this product you agree that you have read the
    license.txt file (The VPN Client license) and will comply with
    its terms.

    Directory where binaries will be installed [/usr/local/bin]

    Automatically start the VPN service at boot time [yes]

    In order to build the VPN kernel module, you must have the
    kernel headers for the version of the kernel you are running.

    Directory containing linux kernel source code [/lib/modules/2.6.24-16-generic/build]

    * Binaries will be installed in “/usr/local/bin”.
    * Modules will be installed in “/lib/modules/2.6.24-16-generic/CiscoVPN”.
    * The VPN service will be started AUTOMATICALLY at boot time.
    * Kernel source from “/lib/modules/2.6.24-16-generic/build” will be used to build the module.

    Is the above correct [y]

    Making module
    make -C /lib/modules/2.6.24-16-generic/build SUBDIRS=/home/robert/Desktop/vpnclient modules
    make[1]: Entering directory `/usr/src/linux-headers-2.6.24-16-generic’
    scripts/Makefile.build:46: *** CFLAGS was changed in “/home/robert/Desktop/vpnclient/Makefile”. Fix it to use EXTRA_CFLAGS. Stop.
    make[1]: *** [_module_/home/robert/Desktop/vpnclient] Error 2
    make[1]: Leaving directory `/usr/src/linux-headers-2.6.24-16-generic’
    make: *** [default] Error 2
    Failed to make module “cisco_ipsec.ko”.

    I’m a noob and have no idea how to fix this. Step by step instructions if you please. Any help would be appreciated. I’m using Ubuntu 8.84 (64-bit ver.) (2.6.24-16-generic)

    Cheers!

  • Lamnk

    Hello maleante, i’ve successfully compiled the cisco vpn module, using both patches for 64 bit and 2.6.24 kernel ! A post will follow shortly ( it’s 3:30 am now … )

    UPDATE: New entry posted.

  • Prabhat

    Hi Lamnk,
    I have also installed Ubuntu 8.0 (LTS Desktop on by IBM T43 laptop). I went through the steps that you have posted,. But even after a successful patch, I am facing the below errors:

    prabhat@pubs:~/cisco applications/vpnclient$ su
    Password:
    root@pubs:/home/prabhat/cisco applications/vpnclient# ./vpn_install
    Cisco Systems VPN Client Version 4.8.01 (0640) Linux Installer
    Copyright (C) 1998-2006 Cisco Systems, Inc. All Rights Reserved.

    By installing this product you agree that you have read the
    license.txt file (The VPN Client license) and will comply with
    its terms.

    Directory where binaries will be installed [/usr/local/bin]

    Automatically start the VPN service at boot time [yes]

    In order to build the VPN kernel module, you must have the
    kernel headers for the version of the kernel you are running.

    Directory containing linux kernel source code [/lib/modules/2.6.24-16-generic/build]

    * Binaries will be installed in “/usr/local/bin”.
    * Modules will be installed in “/lib/modules/2.6.24-16-generic/CiscoVPN”.
    * The VPN service will be started AUTOMATICALLY at boot time.
    * Kernel source from “/lib/modules/2.6.24-16-generic/build” will be used to build the module.

    Is the above correct [y]

    Making module
    make -C /lib/modules/2.6.24-16-generic/build SUBDIRS=/home/prabhat/cisco applications/vpnclient modules
    make[1]: Entering directory `/usr/src/linux-headers-2.6.24-16-generic’
    make[1]: *** No rule to make target `applications/vpnclient’. Stop.
    make[1]: Leaving directory `/usr/src/linux-headers-2.6.24-16-generic’
    make: *** [default] Error 2
    Failed to make module “cisco_ipsec.ko”.

  • ios46

    On Kubuntu 8.04 LTS 64bit however it worked with a combo of 2 patch files (the one posted here), where it returns an error complaining about CFLAGS variable, open Makefile with an editor and replace it with EXTRA_CFLAGS. The installation fails however and i tried to start differently. Erase everything and install the vpnclient-linux-x86_64-4.8.01.0640-k9.tar.gz, get the patch from: wget http://projects.tuxx-home.at/ciscovpn/patches/cisco_skbuff_offset.patch and apply, then patch once again with: vpnclient-linux-2.6.24-final.diff
    Install VPN client then:

    Linux iordHp 2.6.24-17-generic #1 SMP Thu May 1 13:57:17 UTC 2008 x86_64 GNU/Linux

    Initializing the VPN connection.
    Contacting the gateway at x.x.x.x
    User Authentication for xxxx VPN
    Connection 1…

    Enter Username and Password.

    Username []:
    Password []:
    Authenticating user.
    Negotiating security policies.
    Securing communication channel.

    Welcome to xxx VPN service.
    Unauthorized access prohibited.
    Do you wish to continue? (y/n): y

    Your VPN connection is secure.

    VPN tunnel information.
    Client address: xxxx
    Server address: xxxx
    Encryption: 256-bit AES
    Authentication: HMAC-SHA
    IP Compression: LZS
    NAT passthrough is inactive
    Local LAN Access is disabled

  • User

    Thank you so much ios46 for this comment,
    without I doubt I would have been able to get my vpn working again after the update to 2.6.25

  • Lamnk

    I posted about the 64 bit problem some days ago :)

  • http://www.mikeskramstad.com skramstad

    ios46 has it right.

  • http://www.diveli.com diveli

    Thankyou for the info about the patch for 2.6.24!!

  • Kim Chirnside

    This looked promising. The patch enable my vpnclient-linux-x86_64-4.8.01.0640-k9 client to install on my 32 bit Hardy Heron laptop, and it successfully makes connections and allows me to temporarily connect to the VPN.

    However within a few moments my entire system freezes. This is very consistent, following connections to the VPN. Has anyone experienced this? I can post some log output if someone could direct me to the right location.

    Thoughts?

  • Pingback: I love Ubuntu 8.04 - it just works! (plus, notes on Cisco VPN install) « Community in the Age of Constraints

  • Long

    The vpnclient-linux-2.6.24-final.diff patch didn’t work for me either and I had to manual patch it in order to get it to install.

    My setup:
    * Linux xxx 2.6.24-19-generic #1 SMP Fri Jul 11 2008 x86_64 GNU/Linux – Ubuntu 8.04
    * vpnclient-linux-x86_64-4.8.02.0030-k9.tar.gz

    Cheers!

  • http://vpnprivacy.com vpn service

    Cool! Thank you for a patch. My problem resolved.

  • http://www.blog.arun-prabha.com Arun

    Did anyone get it to work with Ubuntu 8.10? I’m getting the same error as 8.04, but I’m not sure if there’s any patch for Kernel 2.6.27 or whatever that came with Ubuntu 8.10.

  • RKG

    Thanks a lot !!! this works !!

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