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Fast IPsec - hardware-accelerated IP Security Protocols
IPsec is a set of protocols, ESP (for Encapsulating Security Payload) AH
(for Authentication Header), and IPComp (for IP Payload Compression
Protocol) that provide security services for IP datagrams. Fast IPsec is
an experimental implementation of these protocols that uses the crypto(4)
subsystem to carry out cryptographic operations. This means, in
particular, that cryptographic hardware devices are employed whenever
possible to optimize the performance of these protocols.
In general, the Fast IPsec implementation is intended to be compatible
with the KAME IPsec implementation. This documentation concentrates on
differences from that software. The user should refer to ipsec(4) for
basic information on setting up and using these protocols.
System configuration requires the crypto(4) subsystem. When the Fast
IPsec protocols are configured for use, all protocols are included in the
system. To selectively enable/disable protocols, use sysctl(8).
The packets can be passed to a virtual interface, “enc0”, to perform
packet filtering before outbound encryption and after decapsulation
To be added.
crypto(4), enc(4), ipsec(4), setkey(8), sysctl(8)
The protocols draw heavily on the OpenBSD implementation of the IPsec
protocols. The policy management code is derived from the KAME
implementation found in their IPsec protocols. The Fast IPsec protocols
first appeared in FreeBSD 5.0.
There is presently no support for IPv6.
The IPcomp protocol support does not work.
Certain legacy authentication algorithms are not supported because of
issues with the crypto(4) subsystem.
This documentation is incomplete.