Date: Wed, 11 Jan 2012 20:14:24 -0600 From: "David DeSimone" <fox@verio.net> To: <freebsd-net@freebsd.org> Subject: Re: Filtering on IPSEC Message-ID: <20120112021423.GG7008@verio.net> In-Reply-To: <4F0DD127.4040205@FreeBSD.org> References: <4F0DD127.4040205@FreeBSD.org>
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Alex Dupre <ale@FreeBSD.org> wrote:
>
> I've setup my first IPSEC VPN beetween FreeBSD 8.2 and CheckPoint
> VPN-1. I've used a gif interface for the tunnel, setkey for security
> policies and racoon for ikev1.
I've peered with Checkpoint VPN's using FreeBSD but I never needed to
use gif interfaces to make it happen. FreeBSD's tunnel-mode IPSEC seems
to interoperate quite well with Checkpoint's implementation.
You should be able to match tunneled traffic using SPD's like so:
spdadd 10.27.37.0/24 172.30.101.0/24 any -P in ipsec esp/tunnel/192.250.40.23-238.55.55.15/unique;
spdadd 172.30.101.0/24 10.27.37.0/24 any -P out ipsec esp/tunnel/238.55.55.15-192.250.40.23/unique;
With the matching 'sainfo' sections in racoon's config:
sainfo address 10.27.37.0/24 any address 172.30.101.0/24 any
{
lifetime time 1 hour;
encryption_algorithm aes;
authentication_algorithm hmac_sha1;
compression_algorithm deflate;
}
sainfo address 172.30.101.0/24 any address 10.27.37.0/24 any
{
lifetime time 1 hour;
encryption_algorithm aes;
authentication_algorithm hmac_sha1;
compression_algorithm deflate;
}
> All is working fine, but I get a strange behavior: outgoing packets go
> via enc0, while incoming packets arrive in gif0.
Admittedly, I had set all this up back in the FreeBSD 6.x days,
before the 'enc0' interface was invented, so I can't speak to how the
traffic flow works exactly, but it still seems to me that using gif is
needlessly complicating your setup, so you may want to simplify it.
--
David DeSimone == Network Admin == fox@verio.net
"I don't like spinach, and I'm glad I don't, because if I
liked it I'd eat it, and I just hate it." -- Clarence Darrow
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