make -C /lib/modules/2.6.24-16-generic/build SUBDIRS=/usr/src/vpnclient modules
make[1]: Entering directory `/usr/src/linux-headers-2.6.24-16-generic'
  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: 错误： 与‘uintptr_t’类型冲突
include/linux/types.h:40: 错误： ‘uintptr_t’的上一个声明在此
make[2]: *** [/usr/src/vpnclient/linuxcniapi.o] 错误 1
make[1]: *** [_module_/usr/src/vpnclient] 错误 2
make[1]: Leaving directory `/usr/src/linux-headers-2.6.24-16-generic'
make: *** [default] 错误 2
Failed to make module "cisco_ipsec.ko".

coolerfeng@coolerfeng-desktop:/usr/src/vpnclient$ uname -r
2.6.24-16-generic

wget -q http://projects.tuxx-home.at/ciscovpn/patches/vpnclient-linux-2.6.24.diff

patch < vpnclient-linux-2.6.24.diff

sudo ./vpn_install

$ sudo /etc/init.d/vpnclient_init start

$ sudo vpnclient connect myVPN

coolerfeng@coolerfeng-desktop:~$ sudo vpnclient connect SOHU_CNC
Cisco Systems VPN Client Version 4.8.01 (0640)
Copyright (C) 1998-2007 Cisco Systems, Inc. All Rights Reserved.
Client Type(s): Linux
Running on: Linux 2.6.24-16-generic #1 SMP Thu Apr 10 13:23:42 UTC 2008 i686
Config file directory: /etc/opt/cisco-vpnclient

Initializing the VPN connection.
Contacting the gateway at 202.106.180.11
User Authentication for SOHU_CNC...

The server has requested the following information to complete the user authentication:

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

Your VPN connection is secure.

VPN tunnel information.
Client address: 10.1.8.249
Server address: 202.106.180.11
Encryption: 168-bit 3-DES
Authentication: HMAC-MD5
IP Compression: None
NAT passthrough is active on port UDP 4500
Local LAN Access is disabled