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From: Sam Leffler (sam_at_errno.com)
Date: Fri Feb 07 2003 - 12:25:27 CST
> It's said "A new in-kernel cryptographic framework (see crypto(4) and
> crypto(9)) has been imported from OpenBSD. It provides a consistent
> interface to hardware and software implementations of cryptographic
> algorithms for use by the kernel and access to cryptographic hardware for
> user-mode applications. Hardware device drivers are provided to support
> hifn-based cards ( hifn(4)) and Broadcom-based cards ( ubsec(4))."
> "A FAST_IPSEC kernel option now allows the IPsec implementation to use the
> kernel crypto(4) framework, along with its support for hardware
> cryptographic acceleration. More information can be found in the
> fast_ipsec(4) manual page."
> In this case, if I want to use hardware encryption/decryption, should I
> fast_ipsec instead of ipsec in the kenerl option? By the way, I am using
> FreeBSD 4.7 Release. I am also curious if anybody has such experience in
> this group before my trial. How's the performance?
4.7-release does not have the new ipsec code. I can't recall if the crypto
code got in.
Performance depends on many factors. Give particulars about a configuration
and the setup of the machine (e.g. firewall, client, server) and I can give
you hints. In general I see 100% utilization of the crypto h/w under IPsec
or user load when machines are connected back-to-back with gigE interfaces.
Start loading the host with other duties (e.g. running ipfw rules) or
changing the NIC's and I can't say what you'll get.
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