strongSwan

h1. Windows Suite B Support with IKEv1

Windows Vista Service Pack 1, Windows Server 2008 and Windows 7 support the Suite B cryptographic algorithms for IPsec defined by "RFC 4869":http://tools.ietf.org/html/rfc4869. For Windows configuration details see http://support.microsoft.com/kb/949856/.

The following command sets the IKEv1 Main Mode algorithms:

<pre>

netsh advfirewall set global mainmode mmsecmethods ecdhp256:aes128-sha256,ecdhp384:aes192-sha384,dhgroup14:aes128-sha1

</pre>

The currently configured algorithms can be checked using the command:

<pre>

netsh advfirewall show global

Main Mode:

KeyLifetime  480min,0sess

SecMethods   ECDHP256-AES128-SHA256,ECDHP384-AES192-SHA384,DHGroup14-AES128-SHA1

ForceDH      No

</pre>

The following command sets the IKEv1 Quick Mode algorithms in the rule "VPN ECP":

<pre>

netsh advfirewall consec set rule name="VPN ECP" new qmsecmethods=esp:aesgcm192-aesgcm192,esp:aesgcm128-aesgcm128,esp:sha1-aes128

</pre>

The current rule settings are shown with the following command:

<pre>

netsh advfirewall consec show rule name="VPN ECP"

Rule Name:                            VPN ECP

----------------------------------------------------------------------

Enabled:                              Yes

Profiles:                             Domain,Private,Public

Type:                                 Static

Mode:                                 Tunnel

LocalTunnelEndpoint:                  Any

RemoteTunnelEndpoint:                 10.10.0.1

Endpoint1:                            10.10.0.6/32

Endpoint2:                            10.10.1.0/24

Protocol:                             Any

Action:                               RequireInRequireOut

Auth1:                                ComputerCert

Auth1CAName:                          C=CH, O=strongSwan Project, CN=strongSwan 2009 CA

Auth1CertMapping:                     No

Auth1ExcludeCAName:                   No

Auth1CertType:                        Root

Auth1HealthCert:                      No

MainModeSecMethods:                   ECDHP256-AES128-SHA256,ECDHP384-AES192-SHA384,DHGroup14-AES128-SHA1

QuickModeSecMethods:                  ESP:AESGCM192-AESGCM192+60min+100000kb,ESP:AESGCM128-AESGCM128+60min+100000kb,ESP:SHA1-AES128+60min+100000kb

ExemptIPsecProtectedConnections:      No

ApplyAuthorization:                   No

Ok.

</pre>

On the strongSwan side the following entries are required in ipsec.conf for 128 bit security:

<pre>

conn ecp

     keyexchange=ikev1

     ike=aes128-sha256-ecp256!

     esp=aes128gcm16!

     pfs=no

</pre>

and for 192 bit security:

<pre>

conn ecp

     keyexchange=ikev1

     ike=aes192-sha384-ecp384!

     esp=aes192gcm16!

     pfs=no

</pre>

Here the status output for 128 bit security:

<pre>

ipsec statusall ecp

"ecp": 10.10.1.0/24===10.10.0.1[@vpn.strongswan.org]...10.10.0.6[C=CH, O=strongSwan Project, CN=win.strongswan.org]; erouted; eroute owner: !#12

"ecp":   CAs: 'C=CH, O=strongSwan Project, CN=strongSwan 2009 CA'...'C=CH, O=strongSwan Project, CN=strongSwan 2009 CA'

"ecp":   ike_life: 10800s; ipsec_life: 3600s; rekey_margin: 540s; rekey_fuzz: 100%; keyingtries: 3

"ecp":   dpd_action: clear; dpd_delay: 300s; dpd_timeout: 150s;

"ecp":   policy: PUBKEY+ENCRYPT+TUNNEL+DONTREKEY; prio: 24,32; interface: eth1; 

"ecp":   newest ISAKMP SA: !#11; newest IPsec SA: !#12; 

"ecp":   IKE proposal: AES_CBC_128/HMAC_SHA2_256/ECP_256

"ecp":   ESP proposal: AES_GCM_16_128/AUTH_NONE/<N/A>

!#12: "ecp" STATE_QUICK_R2 (IPsec SA established); EVENT_SA_EXPIRE in 3422s; newest IPSEC; eroute owner

!#12: "ecp" esp.3ca2dd6b@10.10.0.6 (180 bytes, 172s ago) esp.368105e6@10.10.0.1 (240 bytes, 172s ago); tunnel

!#11: "ecp" STATE_MAIN_R3 (sent MR3, ISAKMP SA established); EVENT_SA_EXPIRE in 28622s; newest ISAKMP

</pre>

and 192 bit security:

<pre>

ipsec statusall ecp

"ecp": 10.10.1.0/24===10.10.0.1[@vpn.strongswan.org]...10.10.0.6[C=CH, O=strongSwan Project, CN=win.strongswan.org]; erouted; eroute owner: !#16

"ecp":   CAs: 'C=CH, O=strongSwan Project, CN=strongSwan 2009 CA'...'C=CH, O=strongSwan Project, CN=strongSwan 2009 CA'

"ecp":   ike_life: 10800s; ipsec_life: 3600s; rekey_margin: 540s; rekey_fuzz: 100%; keyingtries: 3

"ecp":   dpd_action: clear; dpd_delay: 300s; dpd_timeout: 150s;

"ecp":   policy: PUBKEY+ENCRYPT+TUNNEL+DONTREKEY; prio: 24,32; interface: eth1; 

"ecp":   newest ISAKMP SA: !#15; newest IPsec SA: !#16; 

"ecp":   IKE proposal: AES_CBC_192/HMAC_SHA2_384/ECP_384

"ecp":   ESP proposal: AES_GCM_16_192/AUTH_NONE/<N/A>

!#16: "ecp" STATE_QUICK_R2 (IPsec SA established); EVENT_SA_EXPIRE in 3584s; newest IPSEC; eroute owner

!#16: "ecp" esp.5ee37f6a@10.10.0.6 (180 bytes, 10s ago) esp.a350055d@10.10.0.1 (240 bytes, 10s ago); tunnel

!#15: "ecp" STATE_MAIN_R3 (sent MR3, ISAKMP SA established); EVENT_SA_EXPIRE in 28783s; newest ISAKMP

</pre>