Setting up a FreeBSD firewall with an IPSec uplink
This article shares steps for setting up an IPSec tunnel for securing a 802.11b wireless uplink. The article also covers basic NAT and IPFW for use with this setup.
Though this article mainly deals with problems inherent to wireless networks, the principals apply equally well to wired networks. Also, though FreeBSD is the OS referenced, this may work equally well with other flavors of BSD. The version of FreeBSD used was 4.5-release.
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