Difference between revisions of "Libreswan"

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You should get this if the connection made : 'IPsec SA established'  
 
You should get this if the connection made : 'IPsec SA established'  
  
The following check your configuration:
+
The following check your configuration (may be some warnings - severity depends on what they are):
  
  ipsec verify (may be some warnings - severity depends on what they are)
+
  ipsec verify  
  
  

Revision as of 15:24, 22 June 2016

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Version

SME8

Centos 5:
openswan
Please use the version of openswan in the ReetP repo as below
smeserver-openswan
The latest version of smeserver-openswan is available in the SME repository, click on the version number(s) for more information.


SME9

Alpha 10:
Contrib 9:
libreswan
The latest version of libreswan is available in the SME repository, click on the version number(s) for more information.


Devel 10:
Devel 9:
Contrib 9:
smeserver-libreswan
The latest version of smeserver-libreswan is available in the SME repository, click on the version number(s) for more information.


About

Openswan.jpg

Openswan is a free implementation of IPsec& IKE for Linux. IPsec is the Internet Protocol Security and uses strong cryptography to provide both authentication and encryption services. These services allow you to build secure tunnels through untrusted networks. Everything passing through the untrusted net is encrypted by the ipsec gateway machine and decrypted by the gateway at the other end of the tunnel.The resulting tunnel is a virtual private network or VPN.

Libreswan is a free software implementation of the most widely supported and standarized VPN protocol based on ("IPsec") and the Internet Key Exchange ("IKE"). These standards are produced and maintained by the Internet Engineering Task Force ("IETF").

Note that Libreswan will become the default ipsec installation from CentOS 6.8

https://libreswan.org/wiki/HOWTO:_openswan_to_libreswan_migration

  • Credits: John Crisp
  • Discuss: This How-to can be discussed on the forums here


For v9 you can simply install as follows

yum --enablerepo=smecontribs,epel install smeserver-libreswan

Configuration options and notes are here (check the latest branch):

https://github.com/reetp/smeserver-libreswan


For v8 you will additionally need the ReetP repo to install openswan

yum --enablerepo=smecontribs,epel,reetp install smeserver-openswan

Configuration options and notes are here (check the latest branch):

https://github.com/reetp/smeserver-openswan

Installation

[edit]

For SME Server 8, at least openswan-2.6.38-1.x86_64.rpm is required. However, this version is not to be found in the default repo's, nor any of the additional repo's. A trusted copy of Openswan for SME8 can be found here. (This is only for 64bit systems!)

After you have downloaded the above file, you can install it by issuing the following command:

yum localinstall openswan-2.6.38-1.x86_64.rpm

For SME Server 9, the Openswan can be found in the default repo's, so to install Openswan on SME Server 9, simply enter the following command:

yum install openswan

IPSEC server to server configuration

Openswan/IPSEC can be used to setup a secue and permanent VPN connection between a SME Server and another (local or remote) IPSEC enabled device such as a router.

Note - if you want to use with an online VPS set the server to server/gateway with a 'dummy' internal network adaptor.


Passwords

It is recommended to create a very strong random password and keep this safe. One way of generating and store a random strong password is explained here

Settings

The contrib has a lot of configurable settings but with the defaults and few details it should just work

config setprop ipsec status enabled access public

Note for ipsec_connections we use 'set' when we create new connection. Thereafter you can modify it with setprop.

Note most people refer to East and West rather than Local and Remote. There is a very good reason for this if you start using RSA keys !

Server East - WAN IP 5.6.7.8 Local IP 192.168.20.1 Subnet 192.168.20.0/24

db ipsec_connections set MyEast ipsec status enabled leftsourceip 192.168.20.1 leftsubnet 192.168.20.0/24 right 1.2.3.4 rightsubnet 10.0.0.0/24 passwd MyPassWd

Server West- WAN IP 1.2.3.4 Local IP 10.0.0.1 Subnet 10.0.0.0/24

db ipsec_connections set MyWest ipsec status enabled leftsourceip 10.0.0.1 leftsubnet 10.0.0.0/24 right 5.6.7.8 rightsubnet 192.168.20.0/24 passwd MyPassWd
signal-event ipsec-update

Logs

First place to look is /var/log/pluto/pluto.log

The following will give you connection details.

ipsec whack --status

You should get this if the connection made : 'IPsec SA established'

The following check your configuration (may be some warnings - severity depends on what they are):

ipsec verify 


If you modify a connection use

signal-event ipsec-update

For a restart of ipsec use

service ipsec restart

Verifying configuration

To verify your configuration give the following command:

ipsec verify

A reboot should get everything going.


If you need more debugging you can set plutodebug = all

RSA Keys

For the better security it is recommended to use RSA keys. There is more on this on the github page https://github.com/reetp/smeserver-libreswan/blob/master/IpsecSettings.txt


Bug report

SME8 OpenSwan IPSEC is listed in the bugtracker contribs section. Please report all bugs, new feature requests and documentation issues there.

"No open bugs found."

SME9 LibreSwan IPSEC is listed in the bugtracker contribs section. Please report all bugs, new feature requests and documentation issues there.

IDProductVersionStatusSummary (4 tasks)
12109SME Contribs10.0CONFIRMEDNFR reuse existing entries in manager code
11405SME Contribs10betaRESOLVEDInitial Import in SME 10 [smeserver-libreswan]
10661SME Contribs9.2CONFIRMEDNew file to adjust redirects in /etc/sysctl.d
9305SME Contribs9.1CONFIRMEDTrouble configuring kernel settings for ipsec contrib

Other articles in this category

Ipsec, Libreswan, Libreswan-xl2tpd, OpenVPN, OpenVPN Bridge, OpenVPN Bridge/fr, OpenVPN Routed, OpenVPN SiteToSite, SME Server wishlist, SoftEther VPN, Softethervpn-server, VPN, Wireguard