Log on to ciscovpn3000concentrator using vpnc in linux

Use vpnc in linux to log on to ciscovpn3000concentrator -- Linux Enterprise Application-Linux server application information. For more information, see the following. When an enterprise deploys a Cisco VPN3000 series VPN concentractor on a central node, windows users can use the Cisco vpn client software to broadcast the network in the enterprise for remote resource sharing. For Linux users, either the Cisco vpn client software or an open source software named vpnc can be used.

Vpnc installation is relatively simple. If you are using ubuntu, you only need sudo apt-get install vpnc. After the installation is complete, a configuration file example. conf is generated in the/etc/vpnc directory. The main content is as follows:

IPSec gateway [hostname or ip address of vpn concentractor]
IPSec ID [group name]
IPSec secret [group password]
Xauth username [username]
Domain [domain name]

You can ask the vpn administrator about the above content, or configure the settings against the configuration file of the cisco vpn client software. The correspondence between the settings is as follows:

IPSec gateway --> Host
IPSec ID --> GroupName
IPSec secret --> enc_GroupPwd
Xauth username --> Username
Domain --> NTDomain

Note that, because enc_GroupPwd in the configuration file of the cisco vpn client stores the password encrypted, you cannot simply copy or paste the password. Otherwise, an error (ISAKMP_N_AUTHENTICATION_FAILED) (24) occurs during connection.

After setting the configuration file, change it to vpnc. conf and copy it to the/etc directory. Then run the sudo vpnc command to log on and run the vpnc-disconnect command to terminate the connection.