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IPsec VPN – is it all or nothing?

When using an IPSec VPN Client, is there a way, on the client, to have only certain IP addresses or IP address ranges utilize the VPN connection and have all other traffic bypass the tunnel, or is it an all or nothing scenario?

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Most IPsec clients give you a choice. You can force all traffic through the VPN tunnel (sometimes called restricted mode) or have the VPN carry only traffic destined for the LAN addresses behind the associated VPN gateway (split tunnels). Some IPsec VPN implementations even let you setup complex routing schema so you can have really fine-grained control over how and where packets go.

This was first published in March 2003

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