[strongSwan] Multiple IKE SA between same pair of address
Noel Kuntze
noel.kuntze+strongswan-users-ml at thermi.consulting
Tue Jan 16 18:58:17 CET 2018
Hi,
> I agree with Certificates you will need to set "uniqueids=no"...and use the same set of certs for each tunnel..
No, just use different certificates and different IDs. It's not any different with PSKs, for example.
I already did that by scripting with python.
Why do you want that many IKE_SAs? For throughput testing, you only need many CHILD_SAs.
Kind regards
Noel
On 15.01.2018 18:35, Rajiv Kulkarni wrote:
> Hi
>
> Actually it works when using PSK, without setting "uniqueids=no"..it could continue to be the default ."uniqueids=yes" which is implicit..becos you need each tunnel to have unique-ids for separation
>
> I agree with Certificates you will need to set "uniqueids=no"...and use the same set of certs for each tunnel..
>
> So say you have a setup as below:
>
> (multiple-subnets)-----(Lan)[GW1](Wan)====(Wan)[GW2](Lan)-----(multiple-subnets)
>
> Note: Its imperative and must that you define the default-gw-ipaddress (as the remote-gw wanipaddr) on each of the GW1 and GW2...eventhough they maybe connected back-to-back and they maybe having ipaddresses in same subnet...
>
>
> In my case i configured a 1000-tunnels (1 tunnel = 1 IKE-SA pair, 2 IPsec-SA pairs), between GW1 and GW2 using the same single wanipaddress
>
> I did it successfully by ensuring that each connection-entry in the ipsec.conf file has a unique-set of left/right-IDs and therefore a corresponding set of PSK in the ipsec.secrets file
>
> I also successfully sent continuous traffic thru each of the 1000 tunnels (infact i triggered the tunnels to get established by sending traffic hitting each of the ipsec policies...) using tools like spirentTC/ixia....start by sending about 100KB of traffic for each of the subnet-pairs...and once all the tunnels are established..you may increase the traffic load as per your setup requirements
>
> Please find attached the sample config files for both GW1 and GW2 for the 1000-tunnels (please rename the files to ipsec.conf/ipsec.secrets on the respective GWs)
>
> Hope this helps
>
> thanks & regards
> Rajiv
>
>
> On Thu, Jan 11, 2018 at 5:26 PM, Noel Kuntze <noel.kuntze+strongswan-users-ml at thermi.consulting <mailto:noel.kuntze+strongswan-users-ml at thermi.consulting>> wrote:
>
> Hi,
>
> Set uniqueids = no in config setup.
> Better, use swanctl.conf with swanctl. There, you can set it per conn and not globally.
>
> Kind regards
>
> Noel
>
> On 06.01.2018 01:15, Jun Hu wrote:
> > Hi,
> > Does strongswan support multiple IKE SA (each with its own CHILD_SA) between single pair of address?
> > it seems strongswan only allow one IKE SA per pair of address
> >
> > I am using strongswan 5.5.0, inter-op with a IKEv2 client that I wrote (for learning purpose) , my client is the tunnel initiator, when I only creates one IKE SA (along with one CHILD_SA), everything is good;
> > but when my client try to create 2nd CHILD_SA (using IKE_SA_INIT and IKE_AUTH exchange, not rekey) using same addresses,the 2nd IKE and CHILD SA were created successfully at the beginning, but after a few seconds, strongswan send a delete msg to delete the 1st IKE_SA
> >
> > I also tried to set charon.reuse_ikesa to no, but same result
> >
> > I checked strongswan logs, it doesn't say why it deletes 1st IKE SA:
> > root at vm-svr:/usr/local/etc# ipsec status
> > Security Associations (2 up, 0 connecting):
> > l2l[2]: ESTABLISHED 9 seconds ago, 10.10.10.1[10.10.10.1]...10.10.10.20[1.1.1.1]
> > l2l{2}: INSTALLED, TUNNEL, reqid 2, ESP SPIs: c1aab5fc_i 3f174706_o
> > l2l{2}: 10.10.10.1/32 <http://10.10.10.1/32> <http://10.10.10.1/32> === 1.1.1.2/32 <http://1.1.1.2/32> <http://1.1.1.2/32>
> > l2l[1]: ESTABLISHED 19 seconds ago, 10.10.10.1[10.10.10.1]...10.10.10.20[1.1.1.1]
> > l2l{1}: INSTALLED, TUNNEL, reqid 1, ESP SPIs: ca5a49fd_i 617a4971_o
> > l2l{1}: 10.10.10.1/32 <http://10.10.10.1/32> <http://10.10.10.1/32> === 1.1.1.1/32 <http://1.1.1.1/32> <http://1.1.1.1/32>
> > root at vm-svr:/usr/local/etc# ipsec status
> > Security Associations (1 up, 0 connecting):
> > l2l[2]: ESTABLISHED 10 seconds ago, 10.10.10.1[10.10.10.1]...10.10.10.20[1.1.1.1]
> > l2l{2}: INSTALLED, TUNNEL, reqid 2, ESP SPIs: c1aab5fc_i 3f174706_o
> > l2l{2}: 10.10.10.1/32 <http://10.10.10.1/32> <http://10.10.10.1/32> === 1.1.1.2/32 <http://1.1.1.2/32> <http://1.1.1.2/32>
> >
> >
> >
> > part of the log:
> > .....
> > Jan 5 15:50:21 06[MGR] <l2l|2> checkout IKEv2 SA with SPIs 2c79130e38a24598_i c530ad0d0f1a47f0_r
> > Jan 5 15:50:21 06[MGR] <l2l|2> IKE_SA l2l[1] successfully checked out
> > Jan 5 15:50:21 06[MGR] <l2l|1> checkin IKE_SA l2l[1]
> > Jan 5 15:50:21 06[MGR] <l2l|1> checkin of IKE_SA successful
> > Jan 5 15:50:21 06[IKE] <l2l|2> IKE_SA l2l[2] established between 10.10.10.1[10.10.10.1]...10.10.10.20[1.1.1.1]
> > Jan 5 15:50:21 06[IKE] <l2l|2> IKE_SA l2l[2] state change: CONNECTING => ESTABLISHED
> > Jan 5 15:50:21 06[IKE] <l2l|2> scheduling rekeying in 490s
> > Jan 5 15:50:21 06[IKE] <l2l|2> maximum IKE_SA lifetime 500s
> > Jan 5 15:50:21 06[KNL] <l2l|2> got SPI c1aab5fc
> > Jan 5 15:50:21 06[KNL] <l2l|2> adding SAD entry with SPI c1aab5fc and reqid {2}
> > Jan 5 15:50:21 06[KNL] <l2l|2> using encryption algorithm AES_CBC with key size 128
> > Jan 5 15:50:21 06[KNL] <l2l|2> using integrity algorithm HMAC_SHA1_96 with key size 160
> > Jan 5 15:50:21 06[KNL] <l2l|2> using replay window of 32 packets
> > Jan 5 15:50:21 06[KNL] <l2l|2> adding SAD entry with SPI 3f174706 and reqid {2}
> > Jan 5 15:50:21 06[KNL] <l2l|2> using encryption algorithm AES_CBC with key size 128
> > Jan 5 15:50:21 06[KNL] <l2l|2> using integrity algorithm HMAC_SHA1_96 with key size 160
> > Jan 5 15:50:21 06[KNL] <l2l|2> using replay window of 0 packets
> > Jan 5 15:50:21 06[KNL] <l2l|2> adding policy 10.10.10.1/32 <http://10.10.10.1/32> <http://10.10.10.1/32> === 1.1.1.2/32 <http://1.1.1.2/32> <http://1.1.1.2/32> out [priority 383616, refcount 1]
> > Jan 5 15:50:21 06[KNL] <l2l|2> adding policy 1.1.1.2/32 <http://1.1.1.2/32> <http://1.1.1.2/32> === 10.10.10.1/32 <http://10.10.10.1/32> <http://10.10.10.1/32> in [priority 383616, refcount 1]
> > Jan 5 15:50:21 06[KNL] <l2l|2> adding policy 1.1.1.2/32 <http://1.1.1.2/32> <http://1.1.1.2/32> === 10.10.10.1/32 <http://10.10.10.1/32> <http://10.10.10.1/32> fwd [priority 383616, refcount 1]
> > Jan 5 15:50:21 06[KNL] <l2l|2> adding policy 10.10.10.1/32 <http://10.10.10.1/32> <http://10.10.10.1/32> === 1.1.1.2/32 <http://1.1.1.2/32> <http://1.1.1.2/32> fwd [priority 383616, refcount 1]
> > Jan 5 15:50:21 06[KNL] <l2l|2> policy 10.10.10.1/32 <http://10.10.10.1/32> <http://10.10.10.1/32> === 1.1.1.2/32 <http://1.1.1.2/32> <http://1.1.1.2/32> out already exists, increasing refcount
> > Jan 5 15:50:21 06[KNL] <l2l|2> updating policy 10.10.10.1/32 <http://10.10.10.1/32> <http://10.10.10.1/32> === 1.1.1.2/32 <http://1.1.1.2/32> <http://1.1.1.2/32> out [priority 183616, refcount 2]
> > Jan 5 15:50:21 06[KNL] <l2l|2> getting a local address in traffic selector 10.10.10.1/32 <http://10.10.10.1/32> <http://10.10.10.1/32>
> > Jan 5 15:50:21 06[KNL] <l2l|2> using host 10.10.10.1
> > Jan 5 15:50:21 06[KNL] <l2l|2> getting iface name for index 4
> > Jan 5 15:50:21 06[KNL] <l2l|2> using 10.10.10.20 as nexthop and eth2 as dev to reach 10.10.10.20/32 <http://10.10.10.20/32> <http://10.10.10.20/32>
> > Jan 5 15:50:21 06[KNL] <l2l|2> installing route: 1.1.1.2/32 <http://1.1.1.2/32> <http://1.1.1.2/32> via 10.10.10.20 src 10.10.10.1 dev eth2
> > Jan 5 15:50:21 06[KNL] <l2l|2> getting iface index for eth2
> > Jan 5 15:50:21 06[KNL] <l2l|2> policy 1.1.1.2/32 <http://1.1.1.2/32> <http://1.1.1.2/32> === 10.10.10.1/32 <http://10.10.10.1/32> <http://10.10.10.1/32> in already exists, increasing refcount
> > Jan 5 15:50:21 06[KNL] <l2l|2> updating policy 1.1.1.2/32 <http://1.1.1.2/32> <http://1.1.1.2/32> === 10.10.10.1/32 <http://10.10.10.1/32> <http://10.10.10.1/32> in [priority 183616, refcount 2]
> > Jan 5 15:50:21 06[KNL] <l2l|2> policy 1.1.1.2/32 <http://1.1.1.2/32> <http://1.1.1.2/32> === 10.10.10.1/32 <http://10.10.10.1/32> <http://10.10.10.1/32> fwd already exists, increasing refcount
> > Jan 5 15:50:21 06[KNL] <l2l|2> updating policy 1.1.1.2/32 <http://1.1.1.2/32> <http://1.1.1.2/32> === 10.10.10.1/32 <http://10.10.10.1/32> <http://10.10.10.1/32> fwd [priority 183616, refcount 2]
> > Jan 5 15:50:21 06[KNL] <l2l|2> policy 10.10.10.1/32 <http://10.10.10.1/32> <http://10.10.10.1/32> === 1.1.1.2/32 <http://1.1.1.2/32> <http://1.1.1.2/32> fwd already exists, increasing refcount
> > Jan 5 15:50:21 06[KNL] <l2l|2> updating policy 10.10.10.1/32 <http://10.10.10.1/32> <http://10.10.10.1/32> === 1.1.1.2/32 <http://1.1.1.2/32> <http://1.1.1.2/32> fwd [priority 283616, refcount 2]
> > Jan 5 15:50:21 06[IKE] <l2l|2> CHILD_SA l2l{2} established with SPIs c1aab5fc_i 3f174706_o and TS 10.10.10.1/32 <http://10.10.10.1/32> <http://10.10.10.1/32> === 1.1.1.2/32 <http://1.1.1.2/32> <http://1.1.1.2/32>
> > Jan 5 15:50:21 06[KNL] <l2l|2> querying SAD entry with SPI c1aab5fc
> > Jan 5 15:50:21 06[KNL] <l2l|2> querying SAD entry with SPI 3f174706
> > Jan 5 15:50:21 06[KNL] <l2l|2> 10.10.10.1 is on interface eth2
> > Jan 5 15:50:21 06[ENC] <l2l|2> generating IKE_AUTH response 1 [ IDr AUTH SA TSi TSr ]
> > Jan 5 15:50:21 06[NET] <l2l|2> sending packet: from 10.10.10.1[500] to 10.10.10.20[500] (204 bytes)
> > Jan 5 15:50:21 06[MGR] <l2l|2> checkin IKE_SA l2l[2]
> > Jan 5 15:50:21 06[MGR] <l2l|2> checkin of IKE_SA successful
> > Jan 5 15:50:31 05[MGR] checkout IKEv2 SA with SPIs 2c79130e38a24598_i c530ad0d0f1a47f0_r
> > Jan 5 15:50:31 05[MGR] IKE_SA l2l[1] successfully checked out
> > Jan 5 15:50:31 05[IKE] <l2l|1> queueing IKE_DELETE task
> > Jan 5 15:50:31 05[IKE] <l2l|1> activating new tasks
> > Jan 5 15:50:31 05[IKE] <l2l|1> activating IKE_DELETE task
> > Jan 5 15:50:31 05[IKE] <l2l|1> deleting IKE_SA l2l[1] between 10.10.10.1[10.10.10.1]...10.10.10.20[1.1.1.1]
> > Jan 5 15:50:31 05[IKE] <l2l|1> IKE_SA l2l[1] state change: ESTABLISHED => DELETING
> > Jan 5 15:50:31 05[IKE] <l2l|1> sending DELETE for IKE_SA l2l[1]
> > Jan 5 15:50:31 05[ENC] <l2l|1> generating INFORMATIONAL request 0 [ D ]
> > Jan 5 15:50:31 05[NET] <l2l|1> sending packet: from 10.10.10.1[500] to 10.10.10.20[500] (76 bytes)
> > Jan 5 15:50:31 05[MGR] <l2l|1> checkin IKE_SA l2l[1]
> > Jan 5 15:50:31 05[MGR] <l2l|1> checkin of IKE_SA successful
> > Jan 5 15:50:31 13[MGR] checkout IKEv2 SA by message with SPIs 2c79130e38a24598_i c530ad0d0f1a47f0_r
> > Jan 5 15:50:31 13[MGR] IKE_SA l2l[1] successfully checked out
> >
> > ===ipsec.conf===
> > conn %default
> > keyexchange=ikev2
> > mobike = no
> > reauth=no
> >
> > conn l2l
> > ikelifetime=500s
> > margintime=10s
> > rekeyfuzz=0%
> > ike=aes128-sha1-modp2048!
> > esp=aes128-sha1
> > authby=psk
> > leftfirewall=yes
> > rightsubnet=1.0.0.0/8 <http://1.0.0.0/8> <http://1.0.0.0/8>
> > auto=add
> >
> >
>
>
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