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Interoperating with FreeS/WAN

The FreeS/WAN project needs you! We rely on the user community to keep up to date. Mail with your interop success stories.

Please note: Most of our interop examples feature Linux FreeS/WAN 1.x config files. You can convert them to 2.x files fairly easily with the patch in our Upgrading Guide.

Interop at a Glance

 FreeS/WAN VPNRoad Warrior OE
 PSKRSA SecretX.509
(requires patch)
More Compatible
isakmpd (OpenBSD)   Yes  YesYes No    
Kame (FreeBSD,
aka racoon
Yes Yes Yes  No
McAfee VPN
was PGPNet
YesYes Yes  YesNo
Windows 2000/XP
Yes Yes  with FreeS/WAN
as Warrior
SSH Sentinel  Yes Yes  Yes No
Safenet SoftPK
Yes Yes  YesNo
6Wind     Yes  No
Alcatel Timestep   Yes     No
Apple Macintosh
System 10+
Maybe     No
Yes     No
Borderware   Yes    NoNo
Check Point FW-1/VPN-1  Yes  Yes YesNo
Cisco with 3DES   YesMaybe    No
F-Secure   Yes   YesYes No
Gauntlet GVPN   Yes     No
IBM AIX   Yes Maybe   No
IBM AS/400  Yes     No
Intel Shiva
LANRover/Net Structure
Yes     No
Linksys   Maybe  No YesNo
Lucent  Partial     No
Netasq     Yes   No
netcelo     Yes   No
Netgear fvs318   Yes     No
Netscreen 100
or 5xp
Yes    MaybeNo
Nortel Contivity   Partial  Yes  No
RadGuard   Yes     No
Raptor  Yes   Yes No
Redcreek Ravlin   Yes/Partial      No
SonicWall   Yes   NoNo
Sun Solaris      Yes No
Symantec   Yes     No
Yes  Yes  No
Xedia Access Point
Yes     No
 PSKRSA SecretX.509
(requires patch)
 FreeS/WAN VPNRoad Warrior OE


YesPeople report that this works for them.
[Blank]We don't know.
NoWe have reason to believe it was, at some point, not possible to get this to work.
PartialPartial success. For example, a connection can be created from one end only.
Yes/Partial Mixed reports.
MaybeWe think the answer is "yes", but need confirmation.

Basic Interop Rules

Vanilla FreeS/WAN implements these parts of the IPSec specifications.

You can add more with Super FreeS/WAN, but what we offer may be enough for many users. Note: You will need Super FreeS/WAN or the X.509 patch to use X.509 certificates with FreeS/WAN.

We propose a set of proposals which are not user-adjustable, but cover the full set of what we can offer:

We propose Diffie Hellman groups 5 and 2 (in that order), and MD5 and SHA-1 hashes. We always propose: Triple DES encryption, Perfect Forward Secrecy, ...

This yields the proposal grid:

Longer Stories

For More Compatible Implementations

isakmpd (OpenBSD)

OpenBSD FAQ: Using IPsec
Hans-Joerg Hoexer's interop Linux-OpenBSD (PSK)
Skyper's configuration (PSK)
French page with configs (X.509)

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Kame homepage, with FAQ

Itojun's Kame-FreeS/WAN interop tips (PSK)
Ghislaine Labouret's French page with links to matching FreeS/WAN and Kame configs (RSA)
     Ghislaine's post explaining some peculiarities
Frodo's Kame-FreeS/WAN interop (X.509)
Using Kame as a WAVEsec client. Features interop configs along with WAVEsec specific material.

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Tim Carr's Windows Interop Guide (X.509)
Hans-Joerg Hoexer's Guide for Linux-PGPNet (PSK)
Kai Martius' instructions using RSA Key-Extractor Tool (RSA)
    Christian Zeng's page (RSA) based on Kai's work. English or German.
Oscar Delgado's PDF (X.509, no configs)
Ryan's HOWTO for FreeS/WAN-PGPNet (X.509). Through a Linksys Router with IPsec Passthru enabled.
Jean-Francois Nadeau's Practical Configuration (Road Warrior with PSK)
Wouter Prins' HOWTO (Road Warrior with X.509)

Rekeying problem with FreeS/WAN and older PGPNets

DHCP over IPSEC HOWTO for FreeS/WAN (requires X.509 and dhcprelay patches)

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Microsoft Windows 2000/XP

Tim Carr's Windows Interop Guide (X.509)
Jean-Francois Nadeau's Net-net Configuration (PSK)
Telenor's Node-node Config (Transport-mode PSK)
Marcus Mueller's HOWTO using his VPN config tool (X.509). Tool also works with PSK.
Nate Carlson's HOWTO using same tool (Road Warrior with X.509). Unusually, FreeS/WAN is the Road Warrior here.
Oscar Delgado's PDF (X.509, no configs)

Microsoft's page on Win2k TCP/IP security features
Microsoft's Win2k IPsec debugging tips
MS VPN may fall back to 1DES

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SSH Sentinel

SSH's Sentinel-FreeSWAN interop PDF (X.509)
Nadeem Hassan's SUSE-to-Sentinel article (Road warrior with X.509)
O-Zone's Italian HOWTO (Road Warrior, X.509, DHCP)

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Safenet SoftPK/SoftRemote

Whit Blauvelt's SoftRemote tips
Tim Wilson's tips (X.509)

Jean-Francois Nadeau's Practical Configuration (Road Warrior with PSK)
Terradon Communications' PDF (Road Warrior with PSK)'s PDF (Road Warrior to Subnet, with PSK)
Red Baron Consulting's PDF (Road Warrior with X.509)

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For Other Implementations


French page with configs (X.509)

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Alcatel Timestep

Alain Sabban's settings (PSK or PSK road warrior; through static NAT)
Derick Cassidy's configs (PSK)
David Kerry's Timestep settings (PSK)
Kevin Gerbracht's ipsec.conf (X.509)

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Apple Macintosh System 10+

To use Appletalk over IPsec tunnels, run it over tcp/ip.
     Or use Open Door Networks' Shareway IP tool, described here.

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AshleyLaurent VPCom

Successful interop report, no details

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Philip Reetz' configs (PSK)
Borderware server does not support FreeS/WAN road warriors
Older Borderware may not support Diffie Hellman groups 2, 5

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Check Point VPN-1 or FW-1

AERAsec's Firewall-1 NG site (PSK, X.509, Road Warrior with X.509, other algorithms)
     AERAsec's detailed Check Point-FreeS/WAN support matrix PDF: Linux as a VPN Client to FW-1 (PSK)
PhoneBoy's Check Point FAQ (on Check Point only, not FreeS/WAN)

Chris Harwell's tips FreeS/WAN configs (PSK)
Daniel Tombeil's configs (PSK)

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SANS Institute HOWTO (PSK). Detailed, with extensive references.
French page with configs for Cisco IOS, PIX and VPN 3000 (X.509)
Dave McFerren's sample configs (PSK)
Wolfgang Tremmel's sample configs (PSK road warrior)
Old doc from Pete Davis, with William Watson's updated Tips (PSK)

Some PIX specific information:
Scott's ipsec.conf for PIX (PSK, FreeS/WAN side only)
Greg Robinson's PIX FreeS/WAN settings (PSK)
Rick Trimble's PIX and FreeS/WAN settings (PSK)

Cisco VPN support page
Cisco IPsec information page

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F-Secure's "Connecting F-Secure's VPN+ to Linux FreeS/WAN" (PSK road warrior)
    Same thing as PDF
Success report, no detail (PSK)
Success report, no detail (Manual)

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Gauntlet GVPN

Richard Reiner's ipsec.conf (PSK)
Might work without that pesky firewall... (PSK)

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IBM's "Built-In Network Security with AIX" (PSK, X.509)
IBM's tip: importing Linux FreeS/WAN settings into AIX's ikedb (PSK)

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IBM AS/400

Richard Welty's tips and tricks

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Intel Shiva LANRover / Net Structure

Snowcrash's configs (PSK)
Old configs from an interop (PSK)
The day Shiva tickled a Pluto bug (PSK)
     Follow up: success!

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As tunnel endpoint

Ken Bantoft's instructions (Road Warrior with PSK)
Nate Carlson's caveats

In IPsec passthrough mode

Sample HOWTO through a Linksys Router
Nadeem Hasan's configs
Brock Nanson's tips

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Partial success report; see also the next message in thread

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French page with configs (X.509)

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French page with configs (X.509)

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Netgear fvs318

John Morris' setup (PSK)

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Netscreen 100 or 5xp

Errol Neal's settings (PSK)
Corey Rogers' configs (PSK, no PFS)
Jordan Share's configs (PSK, 2 subnets, through static NAT)
Set src proxy_id to your protected subnet/mask
French page with ipsec.conf, Netscreen screen shots (X.509, may need to revert to PSK...)

A report of a company using Netscreen with FreeS/WAN on a large scale (FreeS/WAN road warriors?)

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Nortel Contivity

JJ Streicher-Bremer's mini HOWTO for old new software. (PSK with two subnets)
French page with configs (X.509). This succeeds using the above X.509 tip.

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Marko Hausalo's configs (PSK). Note: These do create a connection, as you can see by "IPsec SA established".
Claudia Schmeing's comments

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Raptor (NT or Solaris)

Peter Mazinger's settings (PSK)
Peter Gerland's configs (PSK)
Charles Griebel's configs (PSK).
Lumir Srch's tips (PSK)

John Hardy's configs (Manual)
Older Raptors want 3DES keys in 3 parts (Manual).
Different keys for each direction? (Manual)

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Redcreek Ravlin

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Wouter's config (PSK)
Dilan Arumainathan's configuration (PSK)
Dariush's setup... only opens one way (PSK)

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Sun Solaris

Aleks Shenkman's configs (Manual in transport mode) sparc 64 stuff goes where?

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Andreas Steffen's configs for Symantec 200R (PSK)

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Watchguard Firebox

WatchGuard's HOWTO (PSK)
Ronald C. Riviera's Settings (PSK)
Max Enders' Configs (Manual)

Old known issue with auto keying
Tips on key generation and format (Manual)

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Xedia Access Point/QVPN

Hybrid IPsec/L2TP connection settings (X.509)
Xedia's LAN-LAN links don't use multiple tunnels
     That explanation, continued

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