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Date:      Sun, 19 Nov 2017 21:30:54 +0700
From:      Victor Sudakov <vas@mpeks.tomsk.su>
To:        "Muenz, Michael" <m.muenz@spam-fetish.org>
Cc:        freebsd-net@freebsd.org
Subject:   Re: OpenVPN vs IPSec
Message-ID:  <20171119143054.GC82727@admin.sibptus.transneft.ru>
In-Reply-To: <d92dff62-3baf-a22d-bfac-5a668b276259@spam-fetish.org>
References:  <20171118165842.GA73810@admin.sibptus.transneft.ru> <b96b449e-3dc1-6e75-e803-e6d6abefe88e@spam-fetish.org> <20171119120832.GA82727@admin.sibptus.transneft.ru> <d92dff62-3baf-a22d-bfac-5a668b276259@spam-fetish.org>

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Muenz, Michael wrote:
> Am 19.11.2017 um 13:08 schrieb Victor Sudakov:
> > Muenz, Michael wrote:
> >>> Is there any reason to prefer IPSec over OpenVPN for building VPNs
> >>> between FreeBSD hosts and routers (and others compatible with OpenVPN
> >>> like pfSense, OpenWRT etc)?
> >>>
> >>> I can see only advantages of OpenVPN (a single UDP port, a single
> >>> userland daemon, no kernel rebuild required, a standard PKI, an easy
> >>> way to push settings and routes to remote clients, nice monitoring
> >>> feature etc). But maybe there is some huge advantage of IPSec I've
> >>> skipped?
> >>>
> >> Hi,
> >>
> >> partners/customers with Cisco IOS or ASA wont be able to partner up
> >> without IPSEC.
> > Sure, that's why I wrote "and others compatible with OpenVPN
> > like pfSense, OpenWRT etc" in the first paragraph.
> >
> 
> Are you just searching for arguments against IPSec or real life cases?

Actually, I' searching for arguments *for* IPSec.

> IMHO when you have both ends under control OpenVPN is just fine.
> If you are planning to interconnect with many customers/vendors IPSec 
> fits best.

I have a personal success story of establishing transport mode IPSec
between Windows and FreeBSD/racoon. But when other OSes are involved,
I have the impression that there is no pure IPSec, it's usually
IPSec+L2TP, and that's where the FreeBSD part becomes complicated
(interaction between ipsec, mpd5 and racoon is required).

> 
> In the last 15 years I was never asked about a Site2Site VPN with OpenVPN
> from any customer or partner of the firewalls I managed.

OK, thank you, I have now one argument: IPSec is multi-vendor.

-- 
Victor Sudakov,  VAS4-RIPE, VAS47-RIPN
AS43859



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