I have already used this configuration a bunch of times and I haven't had this problem before. Basically I establish the tunnel connection, but after connecting (with swanctl --initiate --child ch_

#/etc/ipsec.conf # ipsec.conf - strongSwan IPsec configuration file config setup conn %default ikelifetime=60m keylife=20m rekeymargin=3m keyingtries=1 keyexchange=ikev2 mobike=no conn peer1-peer2 left=192.168.100.1 leftcert=peerCert.der leftid="C=FR O=myOrganisation, CN=vpn-peer1" leftsubnet=192.168.50.0/24 leftfirewall=yes right=192.168.100.2 strongSwan is a multiplatform IPsec implementation. The focus of the project is on strong authentication mechanisms using X.509 public key certificates and optional secure storage of private keys and certificates on smartcards through a standardized PKCS#11 interface and on TPM 2.0. Lastly, follow the Strongswan's 'ipsec.conf' documentation throughly on what are supported on IKEv1. Also, if your endpoint is NTLM based, remember that NTLM passwords are MD4 encoded (just search for something in sense of piping UTF16 string into openssl as MD4). calls ipsec starter which in turn parses ipsec.conf and starts the IKEv1 pluto and IKEv2 charon daemons. ipsec update sends a HUP signal to ipsec starter which in turn determines any changes in ipsec.conf and updates the configuration on the running IKEv1 pluto and IKEv2 charon daemons, correspondingly. ipsec reload

I successfully managed to get Linux VTI (Virtual Tunnel Interface) working with strongSwan. By using VTI it is no longer needed to rely on the routing policy database, making understanding and maintaining routes easier. Also with VTI you can see the cleartext traffic on the VTI interface itself.

Configuration Examples¶. Dozens of both simple and advanced VPN scenarios are available. Please make sure to read the ConfigurationExamplesNotes.. Complete list of scenarios

strongSwan Configuration Overview. strongSwan is an OpenSource IPsec-based VPN solution. This document is just a short introduction, for more detailed information consult the man pages and our wiki. Quickstart. In the following examples we assume, for reasons of clarity, that left designates the local host and that right is the remote host.

For swanctl.conf style configurations, it is not an issue, so remote_addrs or local_addrs can be set to 127.0.0.1 to prevent strongSwan from considering the conn in the conn lookup when a peer tries to connect. In this example, only remote_addrs is set to 127.0.0.1. You are free to choose local_addrs, remote_addrs or both. By disabling charon.prefer_configured_proposals in strongswan.conf this may be changed to selecting the first acceptable proposal sent by the peer instead. In order to restrict a responder to only accept specific cipher suites, the strict flag (!, exclamation mark) can be used, e.g: aes256-sha512-modp4096! strongSwanis an OpenSource IPsec solution for the Linux operating system. It currently supports the following major functions: runs both on Linux 2.4 (KLIPS) and Linux 2.6 (native IPsec) kernels. strong 3DES, AES, Serpent, Twofish, or Blowfish encryption.