strongSwan

<abbr title="heading=MIPv6 HA Setup">TOC</abbr> = MIPv6 Home Agent Setup =

mip6d.conf

{{{
NodeConfig HA;

UseMnHaIPsec enabled;
KeyMngMobCapability enabled;
DefaultBindingAclPolicy deny;

Interface "eth0";

include "/etc/mip6d.conf.d/carol.mip6d.conf"
}}}

mip6d.conf.d/carol.mip6d.conf

{{{
Interface "eth1";

IPsecPolicySet {
HomeAgentAddress 2001:1::1;
HomeAddress 2001:1::10/64;

IPsecPolicy Mh UseESP 1;
    IPsecPolicy TunnelPayload UseESP 2;
}

BindingAclPolicy 2001:1::10 allow;
}}}

ipsec.conf

{{{
config setup
crlcheckinterval=180
plutostart=no
charondebug="knl 2"

conn %default
keyexchange=ikev2
reauth=no
mobike=no
installpolicy=no

conn mh
also=ha
leftsubnet=2001:1::1/128
leftprotoport=135/0
rightprotoport=135/0
type=transport_proxy

conn tunnel
also=ha
leftsubnet=::/0

conn ha
left=2001:1::1
leftcert=moonCert.pem
leftid=@moon.strongswan.org
right=%any
ike=aes128-sha1-modp2048!
esp=aes128-sha1-modp2048!

include /etc/ipsec.conf.d/carol.ipsec.conf
include /etc/ipsec.conf.d/dave.ipsec.conf
}}}

ipsec.conf.d/carol.ipsec.conf

{{{
conn carol
rightsubnet=2001:1::10/128
rightid=carol@strongswan.org

conn carol-mh
also=carol
also=mh
auto=add

conn carol-tunnel
also=carol
also=tunnel
auto=add
}}}

MN-to-HA Connection Establishment

Start strongSwan first and the IPsec connection definitions will be loaded

{{{
ipsec start

Nov 19 08:39:01 moon charon: 01[DMN] starting charon (strongSwan Version 4.2.9)
Nov 19 08:39:01 moon charon: 01[CFG] loading ca certificates from '/etc/ipsec.d/cacerts'
Nov 19 08:39:01 moon charon: 01[LIB] loaded certificate file '/etc/ipsec.d/cacerts/strongswanCert.pem'
Nov 19 08:39:01 moon charon: 01[CFG] loading aa certificates from '/etc/ipsec.d/aacerts'
Nov 19 08:39:01 moon charon: 01[CFG] loading ocsp signer certificates from '/etc/ipsec.d/ocspcerts'
Nov 19 08:39:01 moon charon: 01[CFG] loading attribute certificates from '/etc/ipsec.d/acerts'
Nov 19 08:39:01 moon charon: 01[CFG] loading crls from '/etc/ipsec.d/crls'
Nov 19 08:39:01 moon charon: 01[LIB] loaded crl file '/etc/ipsec.d/crls/strongswan.crl'
Nov 19 08:39:01 moon charon: 01[CFG] loading secrets from '/etc/ipsec.secrets'
Nov 19 08:39:01 moon charon: 01[CFG] loaded private key file '/etc/ipsec.d/private/moonKey.pem'
Nov 19 08:39:01 moon charon: 01[DMN] loaded plugins: curl aes des sha1 sha2 md5 gmp random x509 pubkey hmac xcbc stroke kernel-netlink sqlite sql
Nov 19 08:39:01 moon charon: 01[KNL] listening on interfaces:
Nov 19 08:39:01 moon charon: 01[KNL] eth1
Nov 19 08:39:01 moon charon: 01[KNL] 10.1.0.1
Nov 19 08:39:01 moon charon: 01[KNL] 2001:1::1
Nov 19 08:39:01 moon charon: 01[KNL] fec1::1
Nov 19 08:39:01 moon charon: 01[KNL] fe80::90fb:65ff:fea0:1d83
Nov 19 08:39:01 moon charon: 01[KNL] eth0
Nov 19 08:39:01 moon charon: 01[KNL] 192.168.0.1
Nov 19 08:39:01 moon charon: 01[KNL] 2001::1
Nov 19 08:39:01 moon charon: 01[KNL] fec0::1
Nov 19 08:39:01 moon charon: 01[KNL] fe80::fc27:dff:fe75:c32d
Nov 19 08:39:01 moon charon: 01[JOB] spawning 16 worker threads
Nov 19 08:39:01 moon charon: 08[CFG] crl caching to /etc/ipsec.d/crls enabled
Nov 19 08:39:01 moon charon: 10[CFG] received stroke: add connection 'carol-mh'
Nov 19 08:39:01 moon charon: 10[KNL] getting interface name for %any
Nov 19 08:39:01 moon charon: 10[KNL] %any is not a local address
Nov 19 08:39:01 moon charon: 10[KNL] getting interface name for 2001:1::1
Nov 19 08:39:01 moon charon: 10[KNL] 2001:1::1 is on interface eth1
Nov 19 08:39:01 moon charon: 10[LIB] loaded certificate file '/etc/ipsec.d/certs/moonCert.pem'
Nov 19 08:39:01 moon charon: 10[CFG] added configuration 'carol-mh': 2001:1::1[moon.strongswan.org]...%any[carol@strongswan.org]
Nov 19 08:39:01 moon charon: 12[CFG] received stroke: add connection 'carol-tunnel'
Nov 19 08:39:01 moon charon: 12[KNL] getting interface name for %any
Nov 19 08:39:01 moon charon: 12[KNL] %any is not a local address
Nov 19 08:39:01 moon charon: 12[KNL] getting interface name for 2001:1::1
Nov 19 08:39:01 moon charon: 12[KNL] 2001:1::1 is on interface eth1
Nov 19 08:39:01 moon charon: 12[LIB] loaded certificate file '/etc/ipsec.d/certs/moonCert.pem'
Nov 19 08:39:01 moon charon: 12[CFG] added child to existing configuration 'carol-mh'
Nov 19 08:39:01 moon charon: 14[CFG] received stroke: add connection 'dave-mh'
Nov 19 08:39:01 moon charon: 14[KNL] getting interface name for %any
Nov 19 08:39:01 moon charon: 14[KNL] %any is not a local address
Nov 19 08:39:01 moon charon: 14[KNL] getting interface name for 2001:1::1
Nov 19 08:39:01 moon charon: 14[KNL] 2001:1::1 is on interface eth1
Nov 19 08:39:01 moon charon: 14[LIB] loaded certificate file '/etc/ipsec.d/certs/moonCert.pem'
Nov 19 08:39:01 moon charon: 14[CFG] added configuration 'dave-mh': 2001:1::1[moon.strongswan.org]...%any[dave@strongswan.org]
Nov 19 08:39:01 moon charon: 15[CFG] received stroke: add connection 'dave-tunnel'
Nov 19 08:39:01 moon charon: 15[KNL] getting interface name for %any
Nov 19 08:39:01 moon charon: 15[KNL] %any is not a local address
Nov 19 08:39:01 moon charon: 15[KNL] getting interface name for 2001:1::1
Nov 19 08:39:01 moon charon: 15[KNL] 2001:1::1 is on interface eth1
Nov 19 08:39:01 moon charon: 15[LIB] loaded certificate file '/etc/ipsec.d/certs/moonCert.pem'
Nov 19 08:39:01 moon charon: 15[CFG] added child to existing configuration 'dave-mh'
}}}

Next the MIPv6 daemon is activated

{{{
/etc/init.d/mip6d start

Nov 19 08:39:05 moon mip6d¹⁴⁹⁰: MIPL Mobile IPv6 for Linux v2.0.2-umip-0.4 started (Home Agent)
}}}

strongSwan is now waiting for the MN to initiate the IPsec transport SA for the Binding Update

{{{
Nov 19 08:39:23 moon charon: 03[NET] received packet: from 2001::41a:a8ff:fe6f:c67⁵⁰⁰ to 2001:1::1⁵⁰⁰
Nov 19 08:39:23 moon charon: 03[ENC] parsed IKE_SA_INIT request 0 [ SA KE No N(NATD_S_IP) N(NATD_D_IP) ]
Nov 19 08:39:23 moon charon: 03[IKE] 2001::41a:a8ff:fe6f:c67 is initiating an IKE_SA
Nov 19 08:39:23 moon charon: 03[IKE] sending cert request for "C=CH, O=Linux strongSwan, CN=strongSwan Root CA"
Nov 19 08:39:23 moon charon: 03[ENC] generating IKE_SA_INIT response 0 [ SA KE No N(NATD_S_IP) N(NATD_D_IP) CERTREQ ]
Nov 19 08:39:23 moon charon: 03[NET] sending packet: from 2001:1::1⁵⁰⁰ to 2001::41a:a8ff:fe6f:c67⁵⁰⁰
Nov 19 08:39:23 moon charon: 08[NET] received packet: from 2001::41a:a8ff:fe6f:c67⁵⁰⁰ to 2001:1::1⁵⁰⁰
Nov 19 08:39:23 moon charon: 08[ENC] parsed IKE_AUTH request 1 [ IDi CERT CERTREQ IDr AUTH N(USE_TRANSP) SA TSi TSr ]
Nov 19 08:39:23 moon charon: 08[IKE] received cert request for "C=CH, O=Linux strongSwan, CN=strongSwan Root CA"
Nov 19 08:39:23 moon charon: 08[IKE] received end entity cert "C=CH, O=Linux strongSwan, OU=Research, CN=carol@strongswan.org"
Nov 19 08:39:23 moon charon: 08[CFG] using certificate "C=CH, O=Linux strongSwan, OU=Research, CN=carol@strongswan.org"
Nov 19 08:39:23 moon charon: 08[CFG] using trusted ca certificate "C=CH, O=Linux strongSwan, CN=strongSwan Root CA"
Nov 19 08:39:23 moon charon: 08[CFG] checking certificate status of "C=CH, O=Linux strongSwan, OU=Research, CN=carol@strongswan.org"
Nov 19 08:39:23 moon charon: 08[CFG] using trusted certificate "C=CH, O=Linux strongSwan, CN=strongSwan Root CA"
Nov 19 08:39:23 moon charon: 08[CFG] crl correctly signed by "C=CH, O=Linux strongSwan, CN=strongSwan Root CA"
Nov 19 08:39:23 moon charon: 08[CFG] crl is valid: until Dec 13 07:58:20 2008
Nov 19 08:39:23 moon charon: 08[CFG] using cached crl
Nov 19 08:39:23 moon charon: 08[CFG] certificate status is good
Nov 19 08:39:23 moon charon: 08[IKE] authentication of 'carol@strongswan.org' with RSA signature successful
Nov 19 08:39:23 moon charon: 08[CFG] found matching peer config "carol-mh": moon.strongswan.org...carol@strongswan.org with prio 40.5
Nov 19 08:39:23 moon charon: 08[IKE] authentication of 'moon.strongswan.org' (myself) with RSA signature successful
Nov 19 08:39:23 moon charon: 08[IKE] scheduling rekeying in 3323s
Nov 19 08:39:23 moon charon: 08[IKE] maximum IKE_SA lifetime 3503s
Nov 19 08:39:23 moon charon: 08[IKE] IKE_SA carol-mh¹ established between 2001:1::1[moon.strongswan.org]...2001::41a:a8ff:fe6f:c67[carol@strongswan.org]
Nov 19 08:39:23 moon charon: 08[IKE] sending end entity cert "C=CH, O=Linux strongSwan, CN=moon.strongswan.org"
Nov 19 08:39:23 moon charon: 08[CHD] other address: 2001::41a:a8ff:fe6f:c67 is a transport mode proxy for 2001:1::10
Nov 19 08:39:23 moon charon: 08[KNL] getting SPI for reqid {1}
Nov 19 08:39:23 moon charon: 08[KNL] got SPI ca64ae98 for reqid {1}
Nov 19 08:39:23 moon charon: 08[KNL] adding SAD entry with SPI ca64ae98 and reqid {1}
Nov 19 08:39:23 moon charon: 08[KNL] using encryption algorithm AES_CBC with key size 128
Nov 19 08:39:23 moon charon: 08[KNL] using integrity algorithm HMAC_SHA1_96 with key size 160
Nov 19 08:39:23 moon charon: 08[KNL] adding SAD entry with SPI c5959ac2 and reqid {1}
Nov 19 08:39:23 moon charon: 08[KNL] using encryption algorithm AES_CBC with key size 128
Nov 19 08:39:23 moon charon: 08[KNL] using integrity algorithm HMAC_SHA1_96 with key size 160
Nov 19 08:39:23 moon charon: 08[IKE] CHILD_SA carol-mh{1} established with SPIs ca64ae98_i c5959ac2_o and TS 2001:1::1/128¹³⁵ === 2001:1::10/128¹³⁵
Nov 19 08:39:23 moon charon: 08[ENC] generating IKE_AUTH response 1 [ IDr CERT AUTH N(USE_TRANSP) SA TSi TSr ]
Nov 19 08:39:23 moon charon: 08[NET] sending packet: from 2001:1::1⁵⁰⁰ to 2001::41a:a8ff:fe6f:c67⁵⁰⁰
}}}

The MIPv6 daemon then sends some MIGRATE messages to strongSwan {{{
Nov 19 08:39:24 moon charon: 04[KNL] received a XFRM_MSG_MIGRATE
Nov 19 08:39:24 moon charon: 04[KNL] policy: 2001:1::10/128¹³⁵ === 2001:1::1/128¹³⁵ in
Nov 19 08:39:24 moon charon: 04[KNL] XFRMA_KMADDRESS
Nov 19 08:39:24 moon charon: 04[KNL] kmaddress: 2001:1::1...2001::41a:a8ff:fe6f:c67
Nov 19 08:39:24 moon charon: 04[KNL] XFRMA_POLICY_TYPE
Nov 19 08:39:24 moon charon: 04[KNL] XFRMA_MIGRATE
Nov 19 08:39:24 moon charon: 04[KNL] migrate ESP %any...%any to 2001::41a:a8ff:fe6f:c67...2001:1::1, reqid {1}
Nov 19 08:39:24 moon charon: 04[KNL] creating migrate job for policy 2001:1::10/128¹³⁵ === 2001:1::1/128¹³⁵ in with reqid {1}

Nov 19 08:39:24 moon charon: 05[KNL] interface ip6tnl1 activated

Nov 19 08:39:24 moon charon: 04[KNL] received a XFRM_MSG_MIGRATE
Nov 19 08:39:24 moon charon: 04[KNL] policy: 2001:1::1/128¹³⁵ === 2001:1::10/128¹³⁵ in
Nov 19 08:39:24 moon charon: 04[KNL] XFRMA_KMADDRESS
Nov 19 08:39:24 moon charon: 04[KNL] kmaddress: 2001:1::1...2001::41a:a8ff:fe6f:c67
Nov 19 08:39:24 moon charon: 04[KNL] XFRMA_POLICY_TYPE
Nov 19 08:39:24 moon charon: 04[KNL] XFRMA_MIGRATE
Nov 19 08:39:24 moon charon: 04[KNL] migrate ESP %any...%any to 2001:1::1...2001::41a:a8ff:fe6f:c67, reqid {1}
Nov 19 08:39:24 moon charon: 04[KNL] creating migrate job for policy 2001:1::1/128¹³⁵ === 2001:1::10/128¹³⁵ out with reqid {1}

Nov 19 08:39:24 moon charon: 04[KNL] received a XFRM_MSG_MIGRATE
Nov 19 08:39:24 moon charon: 04[KNL] policy: 2001:1::10/128 === ::/0 out
Nov 19 08:39:24 moon charon: 04[KNL] XFRMA_KMADDRESS
Nov 19 08:39:24 moon charon: 04[KNL] kmaddress: 2001:1::1...2001::41a:a8ff:fe6f:c67
Nov 19 08:39:24 moon charon: 04[KNL] XFRMA_POLICY_TYPE
Nov 19 08:39:24 moon charon: 04[KNL] XFRMA_MIGRATE
Nov 19 08:39:24 moon charon: 04[KNL] migrate ESP 2001:1::10...2001:1::1 to 2001::41a:a8ff:fe6f:c67...2001:1::1, reqid {2}
Nov 19 08:39:24 moon charon: 04[KNL] creating migrate job for policy 2001:1::10/128 === ::/0 in with reqid {2}

Nov 19 08:39:24 moon charon: 04[KNL] received a XFRM_MSG_MIGRATE
Nov 19 08:39:24 moon charon: 04[KNL] policy: 2001:1::10/128 === ::/0 in
Nov 19 08:39:24 moon charon: 04[KNL] XFRMA_KMADDRESS
Nov 19 08:39:24 moon charon: 04[KNL] kmaddress: 2001:1::1...2001::41a:a8ff:fe6f:c67
Nov 19 08:39:24 moon charon: 04[KNL] XFRMA_POLICY_TYPE
Nov 19 08:39:24 moon charon: 04[KNL] XFRMA_MIGRATE
Nov 19 08:39:24 moon charon: 04[KNL] migrate ESP 2001:1::10...2001:1::1 to 2001::41a:a8ff:fe6f:c67...2001:1::1, reqid {2}
Nov 19 08:39:24 moon charon: 04[KNL] creating migrate job for policy 2001:1::10/128 === ::/0 fwd with reqid {2}

Nov 19 08:39:24 moon charon: 04[KNL] received a XFRM_MSG_MIGRATE
Nov 19 08:39:24 moon charon: 04[KNL] policy: ::/0 === 2001:1::10/128 fwd
Nov 19 08:39:24 moon charon: 04[KNL] XFRMA_KMADDRESS
Nov 19 08:39:24 moon charon: 04[KNL] kmaddress: 2001:1::1...2001::41a:a8ff:fe6f:c67
Nov 19 08:39:24 moon charon: 04[KNL] XFRMA_POLICY_TYPE
Nov 19 08:39:24 moon charon: 04[KNL] XFRMA_MIGRATE
Nov 19 08:39:24 moon charon: 04[KNL] migrate ESP 2001:1::1...2001:1::10 to 2001:1::1...2001::41a:a8ff:fe6f:c67, reqid {2}
Nov 19 08:39:24 moon charon: 04[KNL] creating migrate job for policy ::/0 === 2001:1::10/128 out with reqid {2}
Nov 19 08:39:24 moon charon: 11[JOB] no CHILD_SA found with reqid {2}
}}}

Immediately after that the MN initiates the IPsec payload tunnel SA

{{{
Nov 19 08:39:24 moon charon: 14[NET] received packet: from 2001::41a:a8ff:fe6f:c67⁵⁰⁰ to 2001:1::1⁵⁰⁰
Nov 19 08:39:24 moon charon: 14[ENC] parsed CREATE_CHILD_SA request 2 [ SA No KE TSi TSr ]
Nov 19 08:39:24 moon charon: 14[KNL] getting SPI for reqid {2}
Nov 19 08:39:24 moon charon: 14[KNL] got SPI c190d5ba for reqid {2}
Nov 19 08:39:24 moon charon: 14[KNL] adding SAD entry with SPI c190d5ba and reqid {2}
Nov 19 08:39:24 moon charon: 14[KNL] using encryption algorithm AES_CBC with key size 128
Nov 19 08:39:24 moon charon: 14[KNL] using integrity algorithm HMAC_SHA1_96 with key size 160
Nov 19 08:39:24 moon charon: 14[KNL] adding SAD entry with SPI ce4db893 and reqid {2}
Nov 19 08:39:24 moon charon: 14[KNL] using encryption algorithm AES_CBC with key size 128
Nov 19 08:39:24 moon charon: 14[KNL] using integrity algorithm HMAC_SHA1_96 with key size 160
Nov 19 08:39:24 moon charon: 14[IKE] CHILD_SA carol-tunnel{2} established with SPIs c190d5ba_i ce4db893_o and TS ::/0 === 2001:1::10/128
Nov 19 08:39:24 moon charon: 14[ENC] generating CREATE_CHILD_SA response 2 [ SA No KE TSi TSr ]
Nov 19 08:39:24 moon charon: 14[NET] sending packet: from 2001:1::1⁵⁰⁰ to 2001::41a:a8ff:fe6f:c67⁵⁰⁰
Nov 19 08:39:24 moon charon: 12[KNL] querying SAD entry with SPI c190d5ba for update
Nov 19 08:39:24 moon charon: 12[KNL] querying replay state from SAD entry with SPI c190d5ba
Nov 19 08:39:24 moon charon: 12[KNL] deleting SAD entry with SPI c190d5ba
Nov 19 08:39:24 moon charon: 12[KNL] deleted SAD entry with SPI c190d5ba
Nov 19 08:39:24 moon charon: 12[KNL] updating SAD entry with SPI c190d5ba from 2001::41a:a8ff:fe6f:c67⁵⁰⁰..2001:1::1⁵⁰⁰ to 2001::41a:a8ff:fe6f:c67⁰..2001:1::1⁰
Nov 19 08:39:24 moon charon: 12[KNL] querying SAD entry with SPI ce4db893 for update
Nov 19 08:39:24 moon charon: 12[KNL] querying replay state from SAD entry with SPI ce4db893
Nov 19 08:39:24 moon charon: 12[KNL] deleting SAD entry with SPI ce4db893
Nov 19 08:39:24 moon charon: 12[KNL] deleted SAD entry with SPI ce4db893
Nov 19 08:39:24 moon charon: 12[KNL] updating SAD entry with SPI ce4db893 from 2001:1::1⁵⁰⁰..2001::41a:a8ff:fe6f:c67⁵⁰⁰ to 2001:1::1⁰..2001::41a:a8ff:fe6f:c67⁰
}}}

IPsec Status after Establishment

{{{
ipsec statusall

Performance:
uptime: 2 minutes, since Nov 19 08:39:01 2008
worker threads: 9 idle of 16, job queue load: 0, scheduled events: 2
loaded plugins: curl aes des sha1 sha2 md5 gmp random x509 pubkey hmac xcbc stroke kernel-netlink sqlite sql
Listening IP addresses:
10.1.0.1
2001:1::1
fec1::1
192.168.0.1
2001::1
fec0::1
Connections:
carol-mh: 2001:1::1[moon.strongswan.org]...%any[carol@strongswan.org]
carol-mh: CAs: "C=CH, O=Linux strongSwan, CN=strongSwan Root CA"...%any
carol-mh: public key authentication
carol-mh: 2001:1::1/128¹³⁵ === 2001:1::10/128¹³⁵
carol-tunnel: ::/0 === 2001:1::10/128
dave-mh: 2001:1::1[moon.strongswan.org]...%any[dave@strongswan.org]
dave-mh: CAs: "C=CH, O=Linux strongSwan, CN=strongSwan Root CA"...%any
dave-mh: public key authentication
dave-mh: 2001:1::1/128¹³⁵ === 2001:1::20/128¹³⁵
dave-tunnel: ::/0 === 2001:1::20/128
Security Associations:
carol-mh¹: ESTABLISHED, 2001:1::1[moon.strongswan.org]...2001::41a:a8ff:fe6f:c67[carol@strongswan.org]
carol-mh¹: IKE SPIs: 58b6f8e6f23188fa_i 63fdcfb55179c548_r*, rekeying in 53 minutes
carol-mh¹: IKE proposal: AES_CBC-128/HMAC_SHA1_96/PRF_HMAC_SHA1/MODP_2048_BIT
carol-mh{1}: INSTALLED, TRANSPORT_PROXY, ESP SPIs: ca64ae98_i c5959ac2_o
carol-mh{1}: AES_CBC-128/HMAC_SHA1_96, rekeying in 12 minutes, last use: 101s_i no_o
carol-mh{1}: 2001:1::1/128¹³⁵ === 2001:1::10/128¹³⁵
carol-tunnel{2}: INSTALLED, TUNNEL, ESP SPIs: c190d5ba_i ce4db893_o
carol-tunnel{2}: AES_CBC-128/HMAC_SHA1_96, rekeying in 14 minutes, last use: 2s_i 2s_o
carol-tunnel{2}: ::/0 === 2001:1::10/128

}}}

The IPsec policy in the Linux 2.6 kernel

{{{
ip xfrm policy

src 2001:1::10/128 dst 2001:1::1/128 proto 135
dir in priority 2 ptype main
tmpl src :: dst ::
proto esp reqid 1 mode transport

src 2001:1::1/128 dst 2001:1::10/128 proto 135
dir out priority 2 ptype main
tmpl src :: dst ::
proto esp reqid 1 mode transport

src 2001:1::20/128 dst 2001:1::1/128 proto 135
dir in priority 2 ptype main
tmpl src :: dst ::
proto esp reqid 3 mode transport

src 2001:1::1/128 dst 2001:1::20/128 proto 135
dir out priority 2 ptype main
tmpl src :: dst ::
proto esp reqid 3 mode transport

src 2001:1::10/128 dst ::/0
dir in priority 10 ptype main
tmpl src 2001::41a:a8ff:fe6f:c67 dst 2001:1::1
proto esp reqid 2 mode tunnel

src 2001:1::10/128 dst ::/0
dir fwd priority 10 ptype main
tmpl src 2001::41a:a8ff:fe6f:c67 dst 2001:1::1
proto esp reqid 2 mode tunnel

src ::/0 dst 2001:1::10/128
dir out priority 10 ptype main
tmpl src 2001:1::1 dst 2001::41a:a8ff:fe6f:c67
proto esp reqid 2 mode tunnel
}}}

and the IPsec state in the Linux 2.6 kernel

{{{
ip xfrm state

src :: dst ::
proto hao reqid 0 mode ro
replay-window 0 flag wildrecv
coa ::
sel src ::/0 dst ::/0

src 2001:1::10 dst 2001:1::1
proto esp spi 0xca64ae98 reqid 1 mode transport
replay-window 32
auth hmac(sha1) 0x419c41d8807fb521e947988cef4a6181d810b611
enc cbc(aes) 0xed90ae3f4f12a697f40cce1893b54e20
sel src ::/0 dst ::/0

src 2001:1::1 dst 2001:1::10
proto esp spi 0xc5959ac2 reqid 1 mode transport
replay-window 32
auth hmac(sha1) 0xea26afc566143c25959a060c90be3053c50ddcff
enc cbc(aes) 0x0bd5bd34d5523c0929f2efd7a7c93359
sel src ::/0 dst ::/0

src 2001:1::1 dst 2001:1::10
proto route2 reqid 0 mode ro
replay-window 0
coa 2001::41a:a8ff:fe6f:c67
lastused 2008-11-19 08:39:25
sel src 2001:1::1/128 dst 2001:1::10/128

src 2001:1::10 dst 2001:1::1
proto hao reqid 0 mode ro
replay-window 0
coa 2001::41a:a8ff:fe6f:c67
sel src 2001:1::10/128 dst 2001:1::1/128

src 2001::41a:a8ff:fe6f:c67 dst 2001:1::1
proto esp spi 0xc190d5ba reqid 2 mode tunnel
replay-window 32 flag 20
auth hmac(sha1) 0x672c1ea4359956c6a3b869b388b424b7058eee02
enc cbc(aes) 0xaaf5be1d604e64028d4e0a41f0d92b56

src 2001:1::1 dst 2001::41a:a8ff:fe6f:c67
proto esp spi 0xce4db893 reqid 2 mode tunnel
replay-window 32 flag 20
auth hmac(sha1) 0xdf1eeff5b86dfbd183c7a932c8250fc57d9632af
enc cbc(aes) 0x4d138f1363c1810f8c9cb2fcb1ee8bdf
}}}

Care-of-Address (CoA) Change

After some time the MN changes its Care-of-Address (CoA) to 2001::50
which is communicated to the HA via a Binding Update message. This
causes the MIPv6 daemon to issue a MIGRATE message to strongSwan

{{{
Nov 19 08:41:56 moon charon: 04[KNL] received a XFRM_MSG_MIGRATE
Nov 19 08:41:56 moon charon: 04[KNL] policy: 2001:1::10/128¹³⁵ === 2001:1::1/128¹³⁵ out
Nov 19 08:41:56 moon charon: 04[KNL] XFRMA_KMADDRESS
Nov 19 08:41:56 moon charon: 04[KNL] kmaddress: 2001:1::1...2001::50
Nov 19 08:41:56 moon charon: 04[KNL] XFRMA_POLICY_TYPE
Nov 19 08:41:56 moon charon: 04[KNL] XFRMA_MIGRATE
Nov 19 08:41:56 moon charon: 04[KNL] migrate ESP %any...%any to 2001::50...2001:1::1, reqid {1}
Nov 19 08:41:56 moon charon: 04[KNL] creating migrate job for policy 2001:1::10/128¹³⁵ === 2001:1::1/128¹³⁵ in with reqid {1}

Nov 19 08:41:56 moon charon: 04[KNL] received a XFRM_MSG_MIGRATE
Nov 19 08:41:56 moon charon: 04[KNL] policy: 2001:1::1/128¹³⁵ === 2001:1::10/128¹³⁵ in
Nov 19 08:41:56 moon charon: 04[KNL] XFRMA_KMADDRESS
Nov 19 08:41:56 moon charon: 04[KNL] kmaddress: 2001:1::1...2001::50
Nov 19 08:41:56 moon charon: 04[KNL] XFRMA_POLICY_TYPE
Nov 19 08:41:56 moon charon: 04[KNL] XFRMA_MIGRATE
Nov 19 08:41:56 moon charon: 04[KNL] migrate ESP %any...%any to 2001:1::1...2001::50, reqid {1}
Nov 19 08:41:56 moon charon: 04[KNL] creating migrate job for policy 2001:1::1/128¹³⁵ === 2001:1::10/128¹³⁵ out with reqid {1}

Nov 19 08:41:56 moon charon: 04[KNL] received a XFRM_MSG_MIGRATE
Nov 19 08:41:56 moon charon: 04[KNL] policy: 2001:1::10/128 === ::/0 out
Nov 19 08:41:56 moon charon: 04[KNL] XFRMA_KMADDRESS
Nov 19 08:41:56 moon charon: 04[KNL] kmaddress: 2001:1::1...2001::50
Nov 19 08:41:56 moon charon: 04[KNL] XFRMA_POLICY_TYPE
Nov 19 08:41:56 moon charon: 04[KNL] XFRMA_MIGRATE
Nov 19 08:41:56 moon charon: 04[KNL] migrate ESP 2001::41a:a8ff:fe6f:c67...2001:1::1 to 2001::50...2001:1::1, reqid {2}
Nov 19 08:41:56 moon charon: 04[KNL] creating migrate job for policy 2001:1::10/128 === ::/0 in with reqid {2}

Nov 19 08:41:56 moon charon: 10[KNL] querying SAD entry with SPI c190d5ba for update
Nov 19 08:41:56 moon charon: 10[KNL] querying replay state from SAD entry with SPI c190d5ba
Nov 19 08:41:56 moon charon: 10[KNL] deleting SAD entry with SPI c190d5ba
Nov 19 08:41:56 moon charon: 10[KNL] deleted SAD entry with SPI c190d5ba
Nov 19 08:41:56 moon charon: 10[KNL] updating SAD entry with SPI c190d5ba from 2001::41a:a8ff:fe6f:c67⁰..2001:1::1⁰ to 2001::50⁰..2001:1::1⁰

Nov 19 08:41:56 moon charon: 10[KNL] querying SAD entry with SPI ce4db893 for update
Nov 19 08:41:56 moon charon: 10[KNL] querying SAD entry failed: No such process (3)
Nov 19 08:41:56 moon charon: 10[KNL] unable to update SAD entry with SPI ce4db893

Nov 19 08:41:56 moon charon: 04[KNL] received a XFRM_MSG_MIGRATE
Nov 19 08:41:56 moon charon: 04[KNL] policy: 2001:1::10/128 === ::/0 in
Nov 19 08:41:56 moon charon: 04[KNL] XFRMA_KMADDRESS
Nov 19 08:41:56 moon charon: 04[KNL] kmaddress: 2001:1::1...2001::50
Nov 19 08:41:56 moon charon: 04[KNL] XFRMA_POLICY_TYPE
Nov 19 08:41:56 moon charon: 04[KNL] XFRMA_MIGRATE
Nov 19 08:41:56 moon charon: 04[KNL] migrate ESP 2001::41a:a8ff:fe6f:c67...2001:1::1 to 2001::50...2001:1::1, reqid {2}
Nov 19 08:41:56 moon charon: 04[KNL] creating migrate job for policy 2001:1::10/128 === ::/0 fwd with reqid {2}

Nov 19 08:41:56 moon charon: 04[KNL] received a XFRM_MSG_MIGRATE
Nov 19 08:41:56 moon charon: 04[KNL] policy: ::/0 === 2001:1::10/128 fwd
Nov 19 08:41:56 moon charon: 04[KNL] XFRMA_KMADDRESS
Nov 19 08:41:56 moon charon: 04[KNL] kmaddress: 2001:1::1...2001::50
Nov 19 08:41:56 moon charon: 04[KNL] XFRMA_POLICY_TYPE
Nov 19 08:41:56 moon charon: 04[KNL] XFRMA_MIGRATE
Nov 19 08:41:56 moon charon: 04[KNL] migrate ESP 2001:1::1...2001::41a:a8ff:fe6f:c67 to 2001:1::1...2001::50, reqid {2}

}}}

IPSec Status after CoA Change

{{{
ipsec statusall

Performance:
uptime: 3 minutes, since Nov 19 08:39:01 2008
worker threads: 9 idle of 16, job queue load: 0, scheduled events: 2
loaded plugins: curl aes des sha1 sha2 md5 gmp random x509 pubkey hmac xcbc stroke kernel-netlink sqlite sql
Listening IP addresses:
10.1.0.1
2001:1::1
fec1::1
192.168.0.1
2001::1
fec0::1
Connections:
carol-mh: 2001:1::1[moon.strongswan.org]...%any[carol@strongswan.org]
carol-mh: CAs: "C=CH, O=Linux strongSwan, CN=strongSwan Root CA"...%any
carol-mh: public key authentication
carol-mh: 2001:1::1/128¹³⁵ === 2001:1::10/128¹³⁵

carol-tunnel: ::/0 === 2001:1::10/128
dave-mh: 2001:1::1[moon.strongswan.org]...%any[dave@strongswan.org]
dave-mh: CAs: "C=CH, O=Linux strongSwan, CN=strongSwan Root CA"...%any
dave-mh: public key authentication
dave-mh: 2001:1::1/128¹³⁵ === 2001:1::20/128¹³⁵
dave-tunnel: ::/0 === 2001:1::20/128
Security Associations:
carol-mh¹: ESTABLISHED, 2001:1::1[moon.strongswan.org]...2001::50[carol@strongswan.org]
carol-mh¹: IKE SPIs: 58b6f8e6f23188fa_i 63fdcfb55179c548_r*, rekeying in 52 minutes
carol-mh¹: IKE proposal: AES_CBC-128/HMAC_SHA1_96/PRF_HMAC_SHA1/MODP_2048_BIT
carol-mh{1}: INSTALLED, TRANSPORT_PROXY, ESP SPIs: ca64ae98_i c5959ac2_o
carol-mh{1}: AES_CBC-128/HMAC_SHA1_96, rekeying in 11 minutes, last use: 45s_i no_o
carol-mh{1}: 2001:1::1/128¹³⁵ === 2001:1::10/128¹³⁵
carol-tunnel{2}: INSTALLED, TUNNEL, ESP SPIs: c190d5ba_i ce4db893_o
carol-tunnel{2}: AES_CBC-128/HMAC_SHA1_96, rekeying in 13 minutes, last use: 8s_i 8s_o
carol-tunnel{2}: ::/0 === 2001:1::10/128
}}}

and the IPsec state in the Linux 2.6 kernel

{{{
ip xfrm state

src :: dst ::
proto hao reqid 0 mode ro
replay-window 0 flag wildrecv
coa ::
sel src ::/0 dst ::/0

src 2001:1::10 dst 2001:1::1
proto esp spi 0xca64ae98 reqid 1 mode transport
replay-window 32
auth hmac(sha1) 0x419c41d8807fb521e947988cef4a6181d810b611
enc cbc(aes) 0xed90ae3f4f12a697f40cce1893b54e20
sel src ::/0 dst ::/0

src 2001:1::1 dst 2001:1::10
proto esp spi 0xc5959ac2 reqid 1 mode transport
replay-window 32
auth hmac(sha1) 0xea26afc566143c25959a060c90be3053c50ddcff
enc cbc(aes) 0x0bd5bd34d5523c0929f2efd7a7c93359
sel src ::/0 dst ::/0

src 2001:1::1 dst 2001:1::10
proto route2 reqid 0 mode ro
replay-window 0
coa 2001::50
lastused 2008-11-19 08:39:25
sel src 2001:1::1/128 dst 2001:1::10/128

src 2001:1::10 dst 2001:1::1
proto hao reqid 0 mode ro
replay-window 0
coa 2001::50
sel src 2001:1::10/128 dst 2001:1::1/128

src 2001:1::1 dst 2001::50
proto esp spi 0xce4db893 reqid 2 mode tunnel
replay-window 32 flag 20
auth hmac(sha1) 0xdf1eeff5b86dfbd183c7a932c8250fc57d9632af
enc cbc(aes) 0x4d138f1363c1810f8c9cb2fcb1ee8bdf

src 2001::50 dst 2001:1::1
proto esp spi 0xc190d5ba reqid 2 mode tunnel
replay-window 32 flag 20
auth hmac(sha1) 0x672c1ea4359956c6a3b869b388b424b7058eee02
enc cbc(aes) 0xaaf5be1d604e64028d4e0a41f0d92b56
}}}