"Administering heterogenous networks means making Mac and
Windows play nice with Linux, and each other, even when they don't
want to. Here are five Linux VPN clients for Cisco, Juniper, and
other VPN servers, with some compatibility tips and getting
"Cisco VPN Client
"Cisco's official VPN client is compatible with Cisco VPN
servers. In addition to Linux (Intel), it's available for Windows,
Mac OS X, and Solaris UltraSPARC. It currently supports some 64-bit
platforms, in addition to 32-bit.
"The Cisco VPN Client can be preconfigured for large deployments
and requires minimal effort on end-users. It supports Cisco Easy
VPN capabilities, which helps simplify the configuration of network
security policies at the remote location."