Libreswan Documentation
Libreswan's Online Documentation
View the Project on GitHub libreswan/libreswan.github.io
SupportHOWTO
Additional ipsec.conf documentationAWS Mesh
brendans Road Warrior Setup at Home
Configuration examples
Confuse !?@: github wiki
Enterprise cloud encryption
Entropy matters
EoIP shared ethernet LAN using IPsec
High Availability Fallover VPN in AWS
Host to host VPN
Host to host VPN with PSK
Libreswan as client to a Cisco ASA or VPN3000 server
Microsoft Azure configuration
Migrate from IKEv1 DPD to IKEv2 LIVENESS
Opportunistic IPsec
Opportunistic IPsec using LetsEncrypt
Pluto and DNSSEC
Read status output
Route based VPN
SElinux and Labeled IPsec VPN
Subnet extrusion
Subnet to subnet using NAT
Subnet to subnet VPN
Subnet to subnet VPN with PSK
Unauthenticated Opportunistic IPsec
Using Apache to serve PKCS
Using NSS Hardware Tokens
Using NSS with libreswan
VPN server for remote clients using IKEv2
VPN server for remote clients using IKEv2 split VPN
Completed Projects
2026 RFC 9593 Announcing Supported Authentication Methods in IKEv22026 Improve the ACQUIRE to IKE policy lookup
2026 Add HOST TO HOST Support on BSD
2021 RFC 8420 Add EdDSA Signature Authentication Support to IKEv2
2020 Session Resumption
2020 IKEv2 Interop testing with OpenBSD
2020 IKE Intermediate Exchange
2019 Libreswan Opportunistic IPsec using LetsEncrypt
2018 RSA PSS Support in compliance with RFC 7427 and RFC 8247
2018 RFC 7427 Add ECDSA Signature Authentication Support to IKEv2
2018 RFC 5685 Redirect Mechanism
2018 Managing Interface
2017 TCP encapsulation of IKE and IPsec
2017 RFC 7427 Add Signature Authentication Support to IKEv2
2017 Postquantum Preshared Keys
IRC
Hacking
DocumentationGit, GitHub, and Pull Requests
Merging GitHub Pull Requests
Programming Conventions
Testing
DockerKVM
1. Setup The Host2. Configure Testing
3. Compile Libreswan
4. Test Libreswan
5. Accessing The Console
6. Maintenance and Internals
Bisecting
Debugging Pluto
Logging In Using SSH
Performance
Running A Custom Kernel
Running A Single Test
Running In The Background
Setup a Web Server
Testing Old Branches
Updating Test Results
Namespaces
Topology
Internals
3.14 X509Benchmarking and Performance testing
Cipher suites and algorithm support
Cloud OE ideas
Compiling with AddressSanitizer
Compliance of RFC 7427 Signature Authentication in IKEv2
Coverity
Cryptographic Acceleration
Developer links strongswan android
Discouraged or forbidden C functions
IKEv2 Child SA
IKEv2 CP and EAP support
Introduction
Libreswan xfrm kernel support
Logging cleanup
New OE
Pluto
Pluto packet processing
Proposed ipsec ca command
Retransmit timings
Road Map
SAref code
Setting up system for debug logging
stf status
Testing 2017 Next Generation
Unbound
Uncrustify
Use Cases and Requirements document for ECC ECDSA support
Use Cases and Requirements document
XFRM Interface Development Notes
XFRM pCPU
XFRM pCPU RSS
Security
Crypto boundary and certificationLibreswan and Heartbleed
Libreswan and TunnelCrack
Reporting a Vulnerability
Vulnerabilities
Obsolete HOWTOs
IKEv1 XAUTH with FreeOTP and FreeIPAIKEv1 XAUTH with Google Authenticator One Time Passwords
Route based VPN using VTI
Testing Namespace
VPN server for remote clients using IKEv1 with L2TP
VPN server for remote clients using IKEv1 XAUTH with Certificates
VPN server for remote clients using IKEv1 XAUTH with PSK
Azure IKEv2 (Route Based GW) Subnet to Subnet connection with libreswan using PSK Example
Contributed by Amir Naftali of Fortycloud
conn conn2AzureRouteBasedGW
authby=secret
auto=start
dpdaction=restart
dpddelay=30
dpdtimeout=120
forceencaps=yes # not a must
ike=aes256-sha1;modp1024
ikelifetime=10800s
ikev2=yes
keyingtries=3
left=%defaultroute
leftid=<MY PUBLIC IP>
leftsubnets=<Azure Local Network Gateway Subnets>
pfs=yes
phase2alg=aes128-sha1
right=<Azure Route Based GW IP>
rightid=<Azure Route Based GW IP>
rightsubnets=<vNet Subnet>
salifetime=3600s
type=tunnel