added ikev1/nat-virtual-ip scenario
This commit is contained in:
Andreas Steffen
Tobias Brunner
parent
ca0128588f
commit
ac09da8e50
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The router <b>moon</b> sets up a connection to gateway <b>sun</b> in order
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to reach the subnet hidden behind <b>sun</b>. The gateway <b>sun</b> assigns a
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virtual IP address to router <b>moon</b>. A special updown script on <b>moon</b>
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specified by <b>leftupdown=/etc/nat_updown</b> dynamically inserts a source NAT rule
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which maps the IP address of client <b>alice</b> to the virtual IP of <b>moon</b>.
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This allows <b>alice</b> to access client <b>bob</b> via the established IPsec tunnel.
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moon:: ipsec status 2> /dev/null::net-net.*ESTABLISHED.*moon.strongswan.org.*sun.strongswan.org::YES
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sun:: ipsec status 2> /dev/null::net-net.*ESTABLISHED.*sun.strongswan.org.*moon.strongswan.org::YES
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moon:: cat /var/log/daemon.log::inserted NAT rule mapping PH_IP_ALICE to virtual IP::YES
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alice::ping -c 1 PH_IP_BOB::64 bytes from PH_IP_BOB: icmp_req=1::YES
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sun::tcpdump::IP moon.strongswan.org > sun.strongswan.org: ESP::YES
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sun::tcpdump::IP sun.strongswan.org > moon.strongswan.org: ESP::YES
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bob::tcpdump::IP alice2.strongswan.org > bob.strongswan.org: ICMP::YES
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bob::tcpdump::IP bob.strongswan.org > alice2.strongswan.org: ICMP::YES
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# /etc/hosts: This file describes a number of hostname-to-address
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# mappings for the TCP/IP subsystem. It is mostly
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# used at boot time, when no name servers are running.
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# On small systems, this file can be used instead of a
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# "named" name server. Just add the names, addresses
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# and any aliases to this file...
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#
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127.0.0.1 localhost
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192.168.0.254 uml0.strongswan.org uml0
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10.1.0.254 uml1.strongswan.org uml1
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10.2.0.254 uml1.strongswan.org uml2
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10.1.0.10 alice.strongswan.org alice
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10.1.0.20 venus.strongswan.org venus
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10.1.0.1 moon1.strongswan.org moon1
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192.168.0.1 moon.strongswan.org moon
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192.168.0.50 alice1.strongswan.org alice1
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192.168.0.100 carol.strongswan.org carol
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10.3.0.1 carol1.strongswan.org carol1
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192.168.0.150 winnetou.strongswan.org winnetou crl.strongswan.org ocsp.strongswan.org ldap.strongswan.org
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192.168.0.200 dave.strongswan.org dave
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10.3.0.2 dave1.strongswan.org dave1
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192.168.0.2 sun.strongswan.org sun
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10.2.0.1 sun1.strongswan.org sun1
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10.2.0.10 bob.strongswan.org bob
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10.4.0.1 alice2.strongswan.org alice2
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# IPv6 versions of localhost and co
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::1 ip6-localhost ip6-loopback
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fe00::0 ip6-localnet
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ff00::0 ip6-mcastprefix
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ff02::1 ip6-allnodes
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ff02::2 ip6-allrouters
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ff02::3 ip6-allhosts
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# IPv6 solicited-node multicast addresses
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ff02::1:ff00:1 ip6-mcast-1
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ff02::1:ff00:2 ip6-mcast-2
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ff02::1:ff00:10 ip6-mcast-10
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ff02::1:ff00:15 ip6-mcast-15
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ff02::1:ff00:20 ip6-mcast-20
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# IPv6 site-local addresses
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fec0::5 ip6-alice1.strongswan.org ip6-alice1
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fec1::10 ip6-alice.strongswan.org ip6-alice
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fec1::20 ip6-venus.strongswan.org ip6-venus
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fec1::1 ip6-moon1.strongswan.org ip6-moon1
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fec0::1 ip6-moon.strongswan.org ip6-moon
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fec0::10 ip6-carol.strongswan.org ip6-carol
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fec3::1 ip6-carol1.strongswan.org ip6-carol1
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fec0::15 ip6-winnetou.strongswan.org ip6-winnetou
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fec0::20 ip6-dave.strongswan.org ip6-dave
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fec3::2 ip6-dave1.strongswan.org ip6-dave1
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fec0::2 ip6-sun.strongswan.org ip6-sun
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fec2::1 ip6-sun1.strongswan.org ip6-sun1
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fec2::10 ip6-bob.strongswan.org ip6-bob
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# IPv6 link-local HW derived addresses
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fe80::fcfd:0aff:fe01:14 ip6-hw-venus.strongswan.org ip6-hw-venus
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fe80::fcfd:0aff:fe01:0a ip6-hw-alice.strongswan.org ip6-hw-alice
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fe80::fcfd:0aff:fe01:01 ip6-hw-moon1.strongswan.org ip6-hw-moon1
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fe80::fcfd:c0ff:fea8:01 ip6-hw-moon.strongswan.org ip6-hw-moon
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fe80::fcfd:c0ff:fea8:64 ip6-hw-carol.strongswan.org ip6-hw-carol
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fe80::fcfd:c0ff:fea8:96 ip6-hw-winnetou.strongswan.org ip6-hw-winnetou
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fe80::fcfd:c0ff:fea8:c8 ip6-hw-dave.strongswan.org ip6-hw-dave
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fe80::fcfd:c0ff:fea8:02 ip6-hw-sun.strongswan.org ip6-hw-sun
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fe80::fcfd:0aff:fe02:01 ip6-hw-sun1.strongswan.org ip6-hw-sun1
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fe80::fcfd:0aff:fe02:0a ip6-hw-bob.strongswan.org ip6-hw-bob
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# /etc/ipsec.conf - strongSwan IPsec configuration file
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config setup
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conn %default
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ikelifetime=60m
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keylife=20m
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rekeymargin=3m
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keyingtries=1
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keyexchange=ikev1
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mobike=no
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conn net-net
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left=PH_IP_MOON
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leftcert=moonCert.pem
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leftid=@moon.strongswan.org
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leftsourceip=%config
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leftupdown=/etc/nat_updown
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right=PH_IP_SUN
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rightid=@sun.strongswan.org
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rightsubnet=10.2.0.0/16
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auto=add
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#! /bin/sh
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# NAT updown script
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#
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# Copyright (C) 2010 Andreas Steffen <andreas.steffen@strongswan.org>
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#
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# This program is free software; you can redistribute it and/or modify it
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# under the terms of the GNU General Public License as published by the
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# Free Software Foundation; either version 2 of the License, or (at your
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# option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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#
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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# for more details.
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# things that this script gets (from ipsec_pluto(8) man page)
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#
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# PLUTO_VERSION
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# indicates what version of this interface is being
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# used. This document describes version 1.1. This
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# is upwardly compatible with version 1.0.
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#
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# PLUTO_VERB
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# specifies the name of the operation to be performed
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# (prepare-host, prepare-client, up-host, up-client,
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# down-host, or down-client). If the address family
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# for security gateway to security gateway communica-
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# tions is IPv6, then a suffix of -v6 is added to the
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# verb.
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#
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# PLUTO_CONNECTION
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# is the name of the connection for which we are
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# routing.
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#
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# PLUTO_NEXT_HOP
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# is the next hop to which packets bound for the peer
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# must be sent.
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#
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# PLUTO_INTERFACE
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# is the name of the ipsec interface to be used.
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#
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# PLUTO_REQID
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# is the requid of the ESP policy
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#
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# PLUTO_ME
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# is the IP address of our host.
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#
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# PLUTO_MY_ID
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# is the ID of our host.
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#
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# PLUTO_MY_CLIENT
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# is the IP address / count of our client subnet. If
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# the client is just the host, this will be the
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# host's own IP address / max (where max is 32 for
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# IPv4 and 128 for IPv6).
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#
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# PLUTO_MY_CLIENT_NET
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# is the IP address of our client net. If the client
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# is just the host, this will be the host's own IP
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# address.
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#
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# PLUTO_MY_CLIENT_MASK
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# is the mask for our client net. If the client is
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# just the host, this will be 255.255.255.255.
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#
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# PLUTO_MY_SOURCEIP
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# if non-empty, then the source address for the route will be
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# set to this IP address.
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#
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# PLUTO_MY_PROTOCOL
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# is the IP protocol that will be transported.
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#
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# PLUTO_MY_PORT
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# is the UDP/TCP port to which the IPsec SA is
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# restricted on our side.
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#
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# PLUTO_PEER
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# is the IP address of our peer.
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#
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# PLUTO_PEER_ID
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# is the ID of our peer.
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#
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# PLUTO_PEER_CA
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# is the CA which issued the cert of our peer.
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#
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# PLUTO_PEER_CLIENT
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# is the IP address / count of the peer's client sub-
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# net. If the client is just the peer, this will be
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# the peer's own IP address / max (where max is 32
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# for IPv4 and 128 for IPv6).
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#
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# PLUTO_PEER_CLIENT_NET
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# is the IP address of the peer's client net. If the
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# client is just the peer, this will be the peer's
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# own IP address.
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#
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# PLUTO_PEER_CLIENT_MASK
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# is the mask for the peer's client net. If the
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# client is just the peer, this will be
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# 255.255.255.255.
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#
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# PLUTO_PEER_PROTOCOL
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# is the IP protocol that will be transported.
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#
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# PLUTO_PEER_PORT
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# is the UDP/TCP port to which the IPsec SA is
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# restricted on the peer side.
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#
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# define a minimum PATH environment in case it is not set
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PATH="/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin"
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export PATH
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# resolve octal escape sequences
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PLUTO_MY_ID=`printf "$PLUTO_MY_ID"`
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PLUTO_PEER_ID=`printf "$PLUTO_PEER_ID"`
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case "$PLUTO_VERB:$1" in
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up-host:)
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# connection to me coming up
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# If you are doing a custom version, firewall commands go here.
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;;
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down-host:)
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# connection to me going down
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# If you are doing a custom version, firewall commands go here.
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;;
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up-client:)
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# connection to my client subnet coming up
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# If you are doing a custom version, firewall commands go here.
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iptables -A FORWARD -i eth1 -o $PLUTO_INTERFACE -s PH_IP_ALICE \
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-d $PLUTO_PEER_CLIENT -j ACCEPT
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iptables -A FORWARD -o eth1 -i $PLUTO_INTERFACE -d PH_IP_ALICE \
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-s $PLUTO_PEER_CLIENT -j ACCEPT
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iptables -t nat -A POSTROUTING -o $PLUTO_INTERFACE -s PH_IP_ALICE \
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-d $PLUTO_PEER_CLIENT -j SNAT --to-source $PLUTO_MY_SOURCEIP
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echo "inserted NAT rule mapping PH_IP_ALICE to virtual IP $PLUTO_MY_SOURCEIP" >&2
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;;
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down-client:)
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# connection to my client subnet going down
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# If you are doing a custom version, firewall commands go here.
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iptables -D FORWARD -i eth1 -o $PLUTO_INTERFACE -s PH_IP_ALICE \
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-d $PLUTO_PEER_CLIENT -j ACCEPT
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iptables -D FORWARD -o eth1 -i $PLUTO_INTERFACE -d PH_IP_ALICE \
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-s $PLUTO_PEER_CLIENT -j ACCEPT
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iptables -t nat -D POSTROUTING -o $PLUTO_INTERFACE -s PH_IP_ALICE \
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-d $PLUTO_PEER_CLIENT -j SNAT --to-source $PLUTO_MY_SOURCEIP
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echo "deleted NAT rule mapping PH_IP_ALICE to virtual IP $PLUTO_MY_SOURCEIP" >&2
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;;
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*) echo "$0: unknown verb \`$PLUTO_VERB' or parameter \`$1'" >&2
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exit 1
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;;
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esac
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@ -0,0 +1,6 @@
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# /etc/strongswan.conf - strongSwan configuration file
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charon {
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load = curl aes des sha1 sha2 md5 pem pkcs1 gmp random nonce x509 revocation hmac xcbc stroke kernel-netlink socket-default updown
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multiple_authentication = no
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}
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@ -0,0 +1,22 @@
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# /etc/ipsec.conf - strongSwan IPsec configuration file
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config setup
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conn %default
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ikelifetime=60m
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keylife=20m
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rekeymargin=3m
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keyingtries=1
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keyexchange=ikev1
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mobike=no
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conn net-net
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left=PH_IP_SUN
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leftcert=sunCert.pem
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leftid=@sun.strongswan.org
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leftsubnet=10.2.0.0/16
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leftfirewall=yes
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right=PH_IP_MOON
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rightid=@moon.strongswan.org
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rightsourceip=10.4.0.0/24
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auto=add
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@ -0,0 +1,6 @@
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# /etc/strongswan.conf - strongSwan configuration file
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charon {
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load = curl aes des sha1 sha2 md5 pem pkcs1 gmp random nonce x509 revocation hmac xcbc stroke kernel-netlink socket-default updown
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multiple_authentication = no
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}
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@ -0,0 +1,6 @@
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moon::ipsec stop
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sun::ipsec stop
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moon::iptables-restore < /etc/iptables.flush
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sun::iptables-restore < /etc/iptables.flush
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moon::conntrack -F
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moon::rm /etc/nat_updown
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@ -0,0 +1,9 @@
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moon::iptables-restore < /etc/iptables.rules
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sun::iptables-restore < /etc/iptables.rules
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moon::conntrack -F
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moon::echo 1 > /proc/sys/net/ipv4/ip_forward
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moon::ipsec start
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sun::ipsec start
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moon::sleep 1
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moon::ipsec up net-net
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moon::sleep 1
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@ -0,0 +1,21 @@
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#!/bin/bash
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#
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# This configuration file provides information on the
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# UML instances used for this test
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# All UML instances that are required for this test
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#
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UMLHOSTS="alice moon winnetou sun bob"
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# Corresponding block diagram
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#
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DIAGRAM="a-m-w-s-b.png"
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# UML instances on which tcpdump is to be started
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#
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TCPDUMPHOSTS="sun bob"
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# UML instances on which IPsec is started
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# Used for IPsec logging purposes
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#
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IPSECHOSTS="moon sun"
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