Introduction. This document describes a L2TP/IPSec setup on a CentOS 6 server for use with Android ICS clients. As Openswan is reported having issues with Android ICS (byte 7 of ISAKMP NAT-OA Payload must be zero), this VPN setup is based on the ipsec-tools.

Stop racoon: sudo killall racoon; Connect to the Linux VPN server (this will start racoon again). Examine /var/log/debug.log for errors. Alexandre also provides a procedure for even more logging by "tracing" racoon: Find the process ID of racoon and attach a trace to it: ps auux | grep racoon; sudo ktrace -p

(5)racoon exchange the Key by using IKE with the other to be established IPsec-SA. (6)racoon put the Key into SAD. (7)Kernel can send a packet applied IPsec. So that the administrator must configure SPD entries by using setkey command, and must configure racoon. Also it must be required to run racoon or else on the other side.

Götz: Looking at the diagram of your config, I see the following: RW Physical NIC IP (private): 10.10.10.128 RW Router IP (private): 10.10.10.1 RW Router IP (public): 1.2.3.4 VPN Server IP (public): 1.2.3.5 VPN Server IP (private): 192.168.1.1 Local Host IP (private): 192.168.1.2 What I don't see is the VPN Tunnel IP address that racoon hands out when RW initiates a connection inbound. From the IOS Vpn Client i get : ""the vpn server did not respond"" On the logs i have: Nov 21 22:01:38 racoon: INFO: unsupported PF_KEY message REGISTER Nov 21 22:04:38 racoon: INFO: unsupported PF_KEY message REGISTER. And on the Status->IPSec tab i have what's shown on the screenshot underneath. I must be missing something huge.

Racoon is an IPSec key exchange (IKE) server, its role it's to negotiate the keys with the client in order to establish an IPSec Security Association (SA). This scenario requires a so called "road warrior" configuration, where one endpoint of the tunnel (the client) is not known beforehand.

Racoon hint. It's a workaround, but it works. (Linked from Setup a VPN server with Mavericks Server 10.9) So you wanted more than just a hint? Well, okay. As mentioned, the current version of Mavericks Server (3.0.1) has issues with L2TP VPN connectivity. Until Apple officially releases a fix for this, one way to work around this is to replace the copy of /usr/sbin/racoon shipping in Mavericks Server with a copy of /usr/sbin/racoon that shipped in Mountain Lion Server. May 14, 2010 · # Server (WAN IP 100.100.100.100, VPN IP 10.9.255.1) Certificates. We will install the CA and certificates in /etc/racoon/conf. mkdir /etc/racoon/conf, then copy the following files: ### build_ca.sh #!/bin/sh IPSEC_CA = "./ca/ipsec_ca" rm-rf./ca mkdir-p ca/certs mkdir-p ca/newcerts mkdir-p ca/crl mkdir-p ca/private touch./ca/index.txt echo '01 Racoon is an IPSec key exchange (IKE) server, its role it's to negotiate the keys with the client in order to establish an IPSec Security Association (SA). This scenario requires a so called "road warrior" configuration, where one endpoint of the tunnel (the client) is not known beforehand. Currently Racoon2 works well as an L2TP/IPsec VPN server or as an IKEv2 VPN server running on NetBSD. Racoon2 on Linux will provide only limited functionality because Racoon2 uses the pfkeyv2 interface to the kernel, while many Linux features require the IKEv2 daemon to use the netlink interface to the kernel instead.