Source Interface in my setup is the WAN Interface connected to the Internet. The mode determines the type and number of message exchanges that occur in this phase. The first CHILD_SA is created for the proxy_ID pair that matches the trigger packet. These messages negotiate cryptographic algorithms, exchange nonces, and do a Diffie-Hellman exchange. Thank You. Has anyone ever created an exception list to bypass zscaler in certain situations and go out the DIA door instead? "You can create the IPsec tunnel in the transport VPN (VPN 0) and in any service VPN (VPN 1 through 65530, except for 512). They contain the source and destination address of the initiator and responder respectively for forwarding/receiving encrypted traffic. Be aware the static route will only be withdrawn from the routing table if the Tunnel goes down. We may get it in march release if everything will be on track. Hi, can you please post the config that solved your problem. For the purposes of this documentation set, bias-free is defined as language that does not imply discrimination based on age, disability, gender, racial identity, ethnic identity, sexual orientation, socioeconomic status, and intersectionality. If your network is live, make sure that you understand the potential impact of any command. Cisco recommends that you have knowledge of the packet exchange for IKEv2. Template applied to Service VPN 1, Source interface from VPN 0 (Internet Interface with public IP to reach external Firewall via Internet). This document describes Internet Key Exchange version 2 (IKEv2) debugs on Cisco IOS when a pre-shared key (PSK) is used. INFO_R Event: EV_CHK_INFO_TYPE IKEv2-PROTO-5: (99): SM Trace-> SA: I . Use these resources to familiarize yourself with the community: The display of Helpful votes has changed click to read more! Components Used The information in this document is based on these software and hardware versions: Internet Key Exchange Version 2 (IKEv2) 189035: *Aug 8 14:01:22.161 Chicago: IKEv2:(SESSION ID = 8673,SA ID = 1):IKE Proposal: 1, SPI size: 0 (initial negotiation), AES-CBC SHA256 SHA256 DH_GROUP_2048_MODP/Group 14, 189036: *Aug 8 14:01:22.161 Chicago: IKEv2:(SA ID = 1):[IKEv2 -> PKI] Retrieve configured trustpoint(s), 189037: *Aug 8 14:01:22.161 Chicago: IKEv2:(SA ID = 1):[PKI -> IKEv2] Retrieved trustpoint(s): 'TP-self-signed-653483565', 189038: *Aug 8 14:01:22.161 Chicago: IKEv2:(SA ID = 1):[IKEv2 -> PKI] Get Public Key Hashes of trustpoints, 189039: *Aug 8 14:01:22.161 Chicago: IKEv2:(SA ID = 1):[PKI -> IKEv2] Getting of Public Key Hashes of trustpoints FAILED, 189040: *Aug 8 14:01:22.161 Chicago: IKEv2:Failed to retrieve Certificate Issuer list, 189041: *Aug 8 14:01:22.161 Chicago: IKEv2:(SESSION ID = 8673,SA ID = 1):Sending Packet [To 2.2.2.2:500/From 1.1.1.1:500/VRF i0:f0], Initiator SPI : 8A15E970577C6140 - Responder SPI : 0550071FA9DFE718 Message id: 0, SA KE N VID VID NOTIFY(NAT_DETECTION_SOURCE_IP) NOTIFY(NAT_DETECTION_DESTINATION_IP), 189042: *Aug 8 14:01:22.161 Chicago: IKEv2:(SESSION ID = 8673,SA ID = 1):Completed SA init exchange, 189043: *Aug 8 14:01:22.161 Chicago: IKEv2:(SESSION ID = 8673,SA ID = 1):Starting timer (30 sec) to wait for auth message, 189044: *Aug 8 14:01:22.429 Chicago: IKEv2:(SESSION ID = 8673,SA ID = 1):Received Packet [From 2.2.2.2:4500/To 1.1.1.1:500/VRF i0:f0], Initiator SPI : 8A15E970577C6140 - Responder SPI : 0550071FA9DFE718 Message id: 1, IDi NOTIFY(INITIAL_CONTACT) NOTIFY(Unknown - 16396) IDr AUTH CFG NOTIFY(ESP_TFC_NO_SUPPORT) NOTIFY(NON_FIRST_FRAGS) SA TSi TSr, 189045: *Aug 8 14:01:22.429 Chicago: IKEv2:(SESSION ID = 8673,SA ID = 1):Stopping timer to wait for auth message, 189046: *Aug 8 14:01:22.429 Chicago: IKEv2:(SESSION ID = 8673,SA ID = 1):Checking NAT discovery, 189047: *Aug 8 14:01:22.429 Chicago: IKEv2:(SESSION ID = 8673,SA ID = 1):NAT OUTSIDE found, 189048: *Aug 8 14:01:22.429 Chicago: IKEv2:(SESSION ID = 8673,SA ID = 1):NAT detected float to init port 4500, resp port 4500, 189049: *Aug 8 14:01:22.433 Chicago: IKEv2:(SESSION ID = 8673,SA ID = 1):Searching policy based on peer's identity '10.5.1.70' of type 'IPv4 address', 189050: *Aug 8 14:01:22.433 Chicago: IKEv2:found matching IKEv2 profile 'FlexVPN', 189051: *Aug 8 14:01:22.433 Chicago: IKEv2:% Getting preshared key from profile keyring keys, 189052: *Aug 8 14:01:22.433 Chicago: IKEv2:% Matched peer block 'DYNAMIC', 189053: *Aug 8 14:01:22.433 Chicago: IKEv2:Searching Policy with fvrf 0, local address 1.1.1.1, 189054: *Aug 8 14:01:22.433 Chicago: IKEv2:Found Policy 'ikev2policy', 189055: *Aug 8 14:01:22.433 Chicago: IKEv2:(SESSION ID = 8673,SA ID = 1):Verify peer's policy, 189056: *Aug 8 14:01:22.433 Chicago: IKEv2:(SESSION ID = 8673,SA ID = 1):Peer's policy verified, 189057: *Aug 8 14:01:22.433 Chicago: IKEv2:(SESSION ID = 8673,SA ID = 1):Get peer's authentication method, 189058: *Aug 8 14:01:22.433 Chicago: IKEv2:(SESSION ID = 8673,SA ID = 1):Peer's authentication method is 'PSK', 189059: *Aug 8 14:01:22.433 Chicago: IKEv2:(SESSION ID = 8673,SA ID = 1):Get peer's preshared key for 10.5.1.70, 189060: *Aug 8 14:01:22.433 Chicago: IKEv2:(SESSION ID = 8673,SA ID = 1):Verify peer's authentication data, 189061: *Aug 8 14:01:22.433 Chicago: IKEv2:(SESSION ID = 8673,SA ID = 1):Use preshared key for id 10.5.1.70, key len 7, 189062: *Aug 8 14:01:22.433 Chicago: IKEv2:[IKEv2 -> Crypto Engine] Generate IKEv2 authentication data, 189063: *Aug 8 14:01:22.433 Chicago: IKEv2:[Crypto Engine -> IKEv2] IKEv2 authentication data generation PASSED, 189064: *Aug 8 14:01:22.433 Chicago: IKEv2:(SESSION ID = 8673,SA ID = 1):Verification of peer's authenctication data PASSED, 189065: *Aug 8 14:01:22.433 Chicago: IKEv2:(SESSION ID = 8673,SA ID = 1):Processing INITIAL_CONTACT, 189066: *Aug 8 14:01:22.433 Chicago: IKEv2:(SESSION ID = 8673,SA ID = 1):Received valid config mode data. To a remote end configured with encryption domains i wasnt sucessfull. Nonce Ni(optional): If the CHILD_SA is created as part of the initial exchange, a second KE payload and nonce must not be sent. 189067: *Aug 8 14:01:22.433 Chicago: IKEv2:Config data recieved: 189068: *Aug 8 14:01:22.433 Chicago: IKEv2:(SESSION ID = 8673,SA ID = 1):Config-type: Config-request, 189069: *Aug 8 14:01:22.433 Chicago: IKEv2:IKEv2 responder - unsupported attrib unknown in cfg-req, 189070: *Aug 8 14:01:22.433 Chicago: IKEv2:IKEv2 responder - unsupported attrib unknown in cfg-req, 189071: *Aug 8 14:01:22.433 Chicago: IKEv2:IKEv2 responder - unsupported attrib unknown in cfg-req, 189072: *Aug 8 14:01:22.433 Chicago: IKEv2:(SESSION ID = 8673,SA ID = 1):Error in settig received config mode data, 189073: *Aug 8 14:01:22.433 Chicago: IKEv2:(SESSION ID = 8673,SA ID = 1):Auth exchange failed, 189074: *Aug 8 14:01:22.433 Chicago: IKEv2:(SESSION ID = 8673,SA ID = 1):: Auth exchange failed, 189075: *Aug 8 14:01:22.433 Chicago: IKEv2:(SESSION ID = 8673,SA ID = 1):Abort exchange, 189076: *Aug 8 14:01:22.433 Chicago: IKEv2:(SESSION ID = 8673,SA ID = 1):Deleting SA, 189077: *Aug 8 14:01:25.429 Chicago: IKEv2:Couldn't find matching SA: Detected an invalid IKE SPI, 189078: *Aug 8 14:01:25.429 Chicago: IKEv2:(SESSION ID = 0,SA ID = 0):Received Packet [From 2.2.2.2:4500/To 1.1.1.1:4500/VRF i0:f0], 189079: *Aug 8 14:01:25.429 Chicago: IKEv2:: A supplied parameter is incorrect, 189080: *Aug 8 14:01:28.429 Chicago: IKEv2:Couldn't find matching SA: Detected an invalid IKE SPI, 189081: *Aug 8 14:01:28.429 Chicago: IKEv2:(SESSION ID = 0,SA ID = 0):Received Packet [From 2.2.2.2:4500/To 1.1.1.1:4500/VRF i0:f0], 189082: *Aug 8 14:01:28.429 Chicago: IKEv2:: A supplied parameter is incorrect, 189083: *Aug 8 14:01:31.433 Chicago: IKEv2:Couldn't find matching SA: Detected an invalid IKE SPI, 189084: *Aug 8 14:01:31.433 Chicago: IKEv2:(SESSION ID = 0,SA ID = 0):Received Packet [From 2.2.2.2:4500/To 1.1.1.1:4500/VRF i0:f0], 189085: *Aug 8 14:01:31.433 Chicago: IKEv2:: A supplied parameter is incorrect. All traffic must be accepted and specific routing is needed to direct traffic into specific tunnels. You can also check the output of theshow crypto sessioncommand on both routers; this output shows the tunnel session status as UP-ACTIVE. New here? I'll log a TAC case next. Communication over the IPSec Tunnel should be done via VPN1. Working output: #show crypto ikev2 profile IKEv2 profile: default Ref Count: 4 Match criteria: Fvrf: global Local address/interface: none Identities: none Certificate maps: mymap Local identity: none <----- Remote identity: none Conditions: FlexVPN No local identity configured, relaying on global default. The link you shared is for a vEdge setup, the one I've found is for cEdge 16.12.x. IKEv2 Payload Types Transform Type Values IKEv2 Transform Attribute Types Transform Type 1 - Encryption Algorithm Transform IDs Transform Type 2 - Pseudorandom Function Transform IDs Transform Type 3 - Integrity Algorithm Transform IDs Transform Type 4 - Key Exchange Method Transform IDs Transform Type 5 - Extended Sequence Numbers Transform IDs Find answers to your questions by entering keywords or phrases in the Search bar above. Any luck getting this to work? I had the same Firebox and RADIUS server working for IPSec MUVPN, but not for IKEv2. You can use IKEv2 as a virtual private network (VPN) tunneling protocol that supports automatic VPN reconnection. If it guesses wrong, the CREATE_CHILD_SA exchange fails, and it will have to retry with a different KEi. Could you please clarify, as I'm waiting for this feature being available for some months now. The Responder tunnel usually comes up before the Initiator. Nonce Ni (optional): If the CHILD_SA is created as part of the initial exchange, a second KE payload and nonce must not be sent), KEi (Key-optional): The CREATE_CHILD_SA request might optionally contain a KE payload for an additional DH exchange to enable stronger guarantees of forward secrecy for the CHILD_SA. this is due to 4.9 a lot of hash/cryptography where removed! Note: In this output, unlike in IKEv1, the PFS DH group value appears as "PFS (Y/N): N, DH group: none" during the first tunnel negotiation, but, after a rekey occurs, the right values appear. Exceptions may be present in the documentation due to language that is hardcoded in the user interfaces of the product software, language used based on RFP documentation, or language that is used by a referenced third-party product. Same in every possible way. These debug commands are used in this document: *Nov 11 20:28:34.003: IKEv2:Got a packet from dispatcher *Nov 11 20:28:34.003: IKEv2: Processing an item off the pak queue *Nov 11 19:30:34.811: IKEv2:% Getting preshared key by address 10.0.0.2 *Nov 11 19:30:34.811: IKEv2:Adding Proposal PHASE1-prop to toolkit policyle *Nov 11 19:30:34.811: IKEv2:(1): Choosing IKE profile IKEV2-SETUP *Nov 11 19:30:34.811: IKEv2:New ikev2 sa request admitted *Nov 11 19:30:34.811: IKEv2:Incrementing outgoing negotiating sa count by one. Router1 verifies and processes the response: (1) The initiator DH secret key is computed, and (2) the initiator skeyid is also generated. No action taken. Bug Details Include This packet contains: ISAKMP Header(SPI/ version/flags), SAr1(cryptographic algorithm that IKE responder chooses), KEr(DH public Key value of the responder), and Responder Nonce. *Nov 11 19:31:35.873: IKEv2:Got a packet from dispatcher *Nov 11 19:31:35.873: IKEv2:Processing an item off the pak queue *Nov 11 19:31:35.873: IKEv2:(SA ID = 2):Request has mess_id 3; expected 3 through 7 *Nov 11 19:31:35.873: IKEv2:(SA ID = 2):Next payload: ENCR, version: 2.0Exchange type: CREATE_CHILD_SA, flags:INITIATORMessage id: 3, length: 396 Payload contents: SANext payload: N, reserved: 0x0, length: 152 last proposal: 0x0, reserved: 0x0, length: 148 Proposal: 1, Protocol id: IKE, SPI size: 8, #trans: 15 last transform: 0x3, reserved: 0x0: length: 12 type: 1, reserved: 0x0, id: AES-CBC last transform: 0x3, reserved: 0x0: length: 12 type: 1, reserved: 0x0, id: AES-CBC last transform: 0x3, reserved: 0x0: length: 12 type: 1, reserved: 0x0, id: AES-CBC last transform: 0x3, reserved: 0x0: length: 8 type: 2, reserved: 0x0, id: SHA512 last transform: 0x3, reserved: 0x0: length: 8 type: 2, reserved: 0x0, id: SHA384 last transform: 0x3, reserved: 0x0: length: 8 type: 2, reserved: 0x0, id: SHA256 last transform: 0x3, reserved: 0x0: length: 8 type: 2, reserved: 0x0, id: SHA1 last transform: 0x3, reserved: 0x0: length: 8 type: 2, reserved: 0x0, id: MD5 last transform: 0x3, reserved: 0x0: length: 8 type: 3, reserved: 0x0, id: SHA512 last transform: 0x3, reserved: 0x0: length: 8 type: 3, reserved: 0x0, id: SHA384 last transform: 0x3, reserved: 0x0: length: 8 type: 3, reserved: 0x0, id: SHA256 last transform: 0x3, reserved: 0x0: length: 8 type: 3, reserved: 0x0, id: SHA96 last transform: 0x3, reserved: 0x0: length: 8 type: 3, reserved: 0x0, id: MD596 last transform: 0x3, reserved: 0x0: length: 8 type: 4, reserved: 0x0, id: DH_GROUP_1536_MODP/Group 5 last transform: 0x0, reserved: 0x0: length: 8 type: 4, reserved: 0x0, id: DH_GROUP_1024_MODP/Group 2 NNext payload: KE, reserved: 0x0, length: 24 KE Next payload: NOTIFY, reserved: 0x0, length: 136 DH group: 2, Reserved: 0x0 *Nov 11 19:31:35.874: IKEv2:Parse Notify Payload: SET_WINDOW_SIZENOTIFY(SET_WINDOW_SIZE) Next payload: NONE, reserved: 0x0, length: 12 Security protocol id: IKE, spi size: 0, type: SET_WINDOW_SIZE *Nov 11 19:31:35.874: IKEv2:(SA ID = 2):SM Trace-> SA: I_SPI=0C33DB40DBAAADE6 R_SPI=F14E2BBA78024DE3 (R) MsgID = 00000003 CurState: READY Event:EV_RECV_CREATE_CHILD *Nov 11 19:31:35.874: IKEv2:(SA ID = 2):Action: Action_Null *Nov 11 19:31:35.874: IKEv2:(SA ID = 2):SM Trace-> SA: I_SPI=0C33DB40DBAAADE6 R_SPI=F14E2BBA78024DE3 (R) MsgID = 00000003 CurState: CHILD_R_INIT Event: EV_RECV_CREATE_CHILD *Nov 11 19:31:35.874: IKEv2:(SA ID = 2):Action: Action_Null *Nov 11 19:31:35.874: IKEv2:(SA ID = 2):SM Trace-> SA: I_SPI=0C33DB40DBAAADE6 R_SPI=F14E2BBA78024DE3 (R) MsgID = 00000003 CurState: CHILD_R_INIT Event: EV_VERIFY_MSG *Nov 11 19:31:35.874: IKEv2:(SA ID = 2):SM Trace-> SA: I_SPI=0C33DB40DBAAADE6 R_SPI=F14E2BBA78024DE3 (R) MsgID = 00000003 CurState: CHILD_R_INIT Event: EV_CHK_CC_TYPE *Nov 11 19:31:35.874: IKEv2:(SA ID = 2):SM Trace-> SA: I_SPI=0C33DB40DBAAADE6 R_SPI=F14E2BBA78024DE3 (R) MsgID = 00000003 CurState: CHILD_R_IKE Event:EV_REKEY_IKESA *Nov 11 19:31:35.874: IKEv2:(SA ID = 2):SM Trace-> SA: I_SPI=0C33DB40DBAAADE6 R_SPI=F14E2BBA78024DE3 (R) MsgID = 00000003 CurState: CHILD_R_IKE Event: EV_GET_IKE_POLICY *Nov 11 19:31:35.874: IKEv2:%Getting preshared key by address 10.0.0.2 *Nov 11 19:31:35.874: IKEv2:% Getting preshared key by address 10.0.0.2 *Nov 11 19:31:35.874: IKEv2:Adding Proposal PHASE1-prop to toolkit policy *Nov 11 19:31:35.874: IKEv2:(SA ID = 2):Using IKEv2 profile 'IKEV2-SETUP' *Nov 11 19:31:35.874: IKEv2:(SA ID = 2):SM Trace-> SA: I_SPI=0C33DB40DBAAADE6 R_SPI=F14E2BBA78024DE3 (R) MsgID = 00000003 CurState: CHILD_R_IKE Event: EV_PROC_MSG *Nov 11 19:31:35.874: IKEv2:(SA ID = 2):SM Trace-> SA: I_SPI=0C33DB40DBAAADE6 R_SPI=F14E2BBA78024DE3 (R) MsgID = 00000003 CurState: CHILD_R_IKE Event: EV_SET_POLICY *Nov 11 19:31:35.874: IKEv2:(SA ID = 2):Setting configured policies *Nov 11 19:31:35.874: IKEv2:(SA ID = 2):SM Trace-> SA: I_SPI=0C33DB40DBAAADE6 R_SPI=F14E2BBA78024DE3 (R) MsgID = 00000003 CurState: CHILD_R_BLD_MSG Event: EV_GEN_DH_KEY *Nov 11 19:31:35.874: IKEv2:(SA ID = 2):SM Trace-> SA: I_SPI=0C33DB40DBAAADE6 R_SPI=F14E2BBA78024DE3 (R) MsgID = 00000003 CurState: CHILD_R_BLD_MSG Event: EV_NO_EVENT *Nov 11 19:31:35.874: IKEv2:(SA ID = 2):SM Trace-> SA: I_SPI=0C33DB40DBAAADE6 R_SPI=F14E2BBA78024DE3 (R) MsgID = 00000003 CurState: CHILD_R_BLD_MSG Event: EV_OK_RECD_DH_PUBKEY_RESP *Nov 11 19:31:35.874: IKEv2:(SA ID = 2):Action: Action_Null *Nov 11 19:31:35.874: IKEv2:(SA ID = 2):SM Trace-> SA: I_SPI=0C33DB40DBAAADE6 R_SPI=F14E2BBA78024DE3 (R) MsgID = 00000003 CurState: CHILD_R_BLD_MSG Event:EV_GEN_DH_SECRET *Nov 11 19:31:35.881: IKEv2:(SA ID = 2):SM Trace-> SA: I_SPI=0C33DB40DBAAADE6 R_SPI=F14E2BBA78024DE3 (R) MsgID = 00000003 CurState: CHILD_R_BLD_MSG Event: EV_NO_EVENT *Nov 11 19:31:35.882: IKEv2:(SA ID = 2):SM Trace-> SA: I_SPI=0C33DB40DBAAADE6 R_SPI=F14E2BBA78024DE3 (R) MsgID = 00000003 CurState: CHILD_R_BLD_MSG Event: EV_OK_RECD_DH_SECRET_RESP *Nov 11 19:31:35.882: IKEv2:(SA ID = 2):Action: Action_Null *Nov 11 19:31:35.882: IKEv2:(SA ID = 2):SM Trace-> SA: I_SPI=0C33DB40DBAAADE6 R_SPI=F14E2BBA78024DE3 (R) MsgID = 00000003 CurState: CHILD_R_BLD_MSG Event: EV_BLD_MSG *Nov 11 19:31:35.882:IKEv2:ConstructNotify Payload: SET_WINDOW_SIZE Payload contents: SANext payload: N, reserved: 0x0, length: 56 last proposal: 0x0, reserved: 0x0, length: 52 Proposal: 1, Protocol id: IKE, SPI size: 8, #trans: 4 last transform: 0x3, reserved: 0x0: length: 12 type: 1, reserved: 0x0, id: AES-CBC last transform: 0x3, reserved: 0x0: length: 8 type: 2, reserved: 0x0, id: SHA1 last transform: 0x3, reserved: 0x0: length: 8 type: 3, reserved: 0x0, id: SHA96 last transform: 0x0, reserved: 0x0: length: 8 type: 4, reserved: 0x0, id: DH_GROUP_1024_MODP/Group 2 NNext payload: KE, reserved: 0x0, length: 24 KE Next payload: NOTIFY, reserved: 0x0, length: 136 DH group: 2, Reserved: 0x0 NOTIFY(SET_WINDOW_SIZE) Next payload: NONE, reserved: 0x0, length: 12 Security protocol id: IKE, spi size: 0, type: SET_WINDOW_SIZE, *Nov 11 19:31:35.869: IKEv2:(SA ID = 2):Next payload: ENCR, version: 2.0 Exchange type:CREATE_CHILD_SA, flags:INITIATORMessage id: 2, length: 460 Payload contents: ENCR Next payload: SA, reserved: 0x0, length: 432, *Nov 11 19:31:35.873: IKEv2:Construct Notify Payload: SET_WINDOW_SIZE Payload contents: SANext payload: N, reserved: 0x0, length: 152 last proposal: 0x0, reserved: 0x0, length: 148 Proposal: 1, Protocol id: IKE, SPI size: 8, #trans: 15 last transform: 0x3, reserved: 0x0: length: 12 type: 1, reserved: 0x0, id: AES-CBC last transform: 0x3, reserved: 0x0: length: 12 type: 1, reserved: 0x0, id: AES-CBC last transform: 0x3, reserved: 0x0: length: 12 type: 1, reserved: 0x0, id: AES-CBC last transform: 0x3, reserved: 0x0: length: 8 type: 2, reserved: 0x0, id: SHA512 last transform: 0x3, reserved: 0x0: length: 8 type: 2, reserved: 0x0, id: SHA384 last transform: 0x3, reserved: 0x0: length: 8 type: 2, reserved: 0x0, id: SHA256 last transform: 0x3, reserved: 0x0: length: 8 type: 2, reserved: 0x0, id: SHA1 last transform: 0x3, reserved: 0x0: length: 8 type: 2, reserved: 0x0, id: MD5 last transform: 0x3, reserved: 0x0: length: 8 type: 3, reserved: 0x0, id: SHA512 last transform: 0x3, reserved: 0x0: length: 8 type: 3, reserved: 0x0, id: SHA384 last transform: 0x3, reserved: 0x0: length: 8 type: 3, reserved: 0x0, id: SHA256 last transform: 0x3, reserved: 0x0: length: 8 type: 3, reserved: 0x0, id: SHA96 last transform: 0x3, reserved: 0x0: length: 8 type: 3, reserved: 0x0, id: MD596 last transform: 0x3, reserved: 0x0: length: 8 type: 4, reserved: 0x0, id: DH_GROUP_1536_MODP/Group 5 last transform: 0x0, reserved: 0x0: length: 8 type: 4, reserved: 0x0, id: DH_GROUP_1024_MODP/Group 2 NNext payload: KE, reserved: 0x0, length: 24 KENext payload: NOTIFY, reserved: 0x0, length: 136 DH group: 2, Reserved: 0x0 NOTIFY(SET_WINDOW_SIZE) Next payload: NONE, reserved: 0x0, length: 12 Security protocol id: IKE, spi size: 0, type: SET_WINDOW_SIZE, *Nov 11 19:31:35.882: IKEv2:(SA ID = 2):Next payload: ENCR, version: 2.0 Exchange type:CREATE_CHILD_SA,flags:RESPONDER MSG-RESPONSEMessage id: 3, length: 300 Payload contents: SANext payload: N, reserved: 0x0, length: 56 last proposal: 0x0, reserved: 0x0, length: 52 Proposal: 1, Protocol id: IKE, SPI size: 8, #trans: 4 last transform: 0x3, reserved: 0x0: length: 12 type: 1, reserved: 0x0, id: AES-CBC last transform: 0x3, reserved: 0x0: length: 8 type: 2, reserved: 0x0, id: SHA1 last transform: 0x3, reserved: 0x0: length: 8 type: 3, reserved: 0x0, id: SHA96 last transform: 0x0, reserved: 0x0: length: 8 type: 4, reserved: 0x0, id: DH_GROUP_1024_MODP/Group 2 NNext payload: KE, reserved: 0x0, length: 24 KENext payload: NOTIFY, reserved: 0x0, length: 136 DH group: 2, Reserved: 0x0 *Nov 11 19:31:35.882: IKEv2:Parse Notify Payload: SET_WINDOW_SIZENOTIFY(SET_WINDOW_SIZE) Next payload: NONE, reserved: 0x0, length: 12 Security protocol id: IKE, spi size: 0, type: SET_WINDOW_SIZE *Nov 11 19:31:35.882: IKEv2:(SA ID = 2):SM Trace-> SA: I_SPI=0C33DB40DBAAADE6 R_SPI=F14E2BBA78024DE3 (I) MsgID = 00000003 CurState:CHILD_I_WAITEvent:EV_RECV_CREATE_CHILD *Nov 11 19:31:35.882: IKEv2:(SA ID = 2):Action: Action_Null *Nov 11 19:31:35.882: IKEv2:(SA ID = 2):SM Trace-> SA: I_SPI=0C33DB40DBAAADE6 R_SPI=F14E2BBA78024DE3 (I) MsgID = 00000003 CurState:CHILD_I_PROCEvent: EV_CHK4_NOTIFY *Nov 11 19:31:35.882: IKEv2:(SA ID = 2):SM Trace-> SA: I_SPI=0C33DB40DBAAADE6 R_SPI=F14E2BBA78024DE3 (I) MsgID = 00000003 CurState: CHILD_I_PROC Event:EV_VERIFY_MSG *Nov 11 19:31:35.882: IKEv2:(SA ID = 2):SM Trace-> SA: I_SPI=0C33DB40DBAAADE6 R_SPI=F14E2BBA78024DE3 (I) MsgID = 00000003 CurState: CHILD_I_PROC Event: EV_PROC_MSG *Nov 11 19:31:35.882: IKEv2:(SA ID = 2):SM Trace-> SA: I_SPI=0C33DB40DBAAADE6 R_SPI=F14E2BBA78024DE3 (I) MsgID = 00000003 CurState: CHILD_I_PROC Event: EV_CHK4_PFS *Nov 11 19:31:35.882: IKEv2:(SA ID = 2):SM Trace-> SA: I_SPI=0C33DB40DBAAADE6 R_SPI=F14E2BBA78024DE3 (I) MsgID = 00000003 CurState: CHILD_I_PROC Event: EV_GEN_DH_SECRET *Nov 11 19:31:35.890: IKEv2:(SA ID = 2):SM Trace-> SA: I_SPI=0C33DB40DBAAADE6 R_SPI=F14E2BBA78024DE3 (I) MsgID = 00000003 CurState: CHILD_I_PROC Event: EV_NO_EVENT *Nov 11 19:31:35.890: IKEv2:(SA ID = 2):SM Trace-> SA: I_SPI=0C33DB40DBAAADE6 R_SPI=F14E2BBA78024DE3 (I) MsgID = 00000003 CurState: CHILD_I_PROC Event: EV_OK_RECD_DH_SECRET_RESP *Nov 11 19:31:35.890: IKEv2:(SA ID = 2):Action: Action_Null *Nov 11 19:31:35.890: IKEv2:(SA ID = 2):SM Trace-> SA: I_SPI=0C33DB40DBAAADE6 R_SPI=F14E2BBA78024DE3 (I) MsgID = 00000003 CurState: CHILD_I_PROC Event: EV_CHK_IKE_REKEY *Nov 11 19:31:35.890: IKEv2:(SA ID = 2):SM Trace-> SA: I_SPI=0C33DB40DBAAADE6 R_SPI=F14E2BBA78024DE3 (I) MsgID = 00000003 CurState: CHILD_I_PROC Event: EV_GEN_SKEYID *Nov 11 19:31:35.890: IKEv2:(SA ID = 2):Generate skeyid *Nov 11 19:31:35.890: IKEv2:(SA ID = 2):SM Trace-> SA: I_SPI=0C33DB40DBAAADE6 R_SPI=F14E2BBA78024DE3 (I) MsgID = 00000003 CurState:CHILD_I_DONEEvent:EV_ACTIVATE_NEW_SA *Nov 11 19:31:35.890: IKEv2:(SA ID = 2):SM Trace-> SA: I_SPI=0C33DB40DBAAADE6 R_SPI=F14E2BBA78024DE3 (I) MsgID = 00000003 CurState: CHILD_I_DONE Event: EV_UPDATE_CAC_STATS *Nov 11 19:31:35.890: IKEv2:New ikev2 sa request activated *Nov 11 19:31:35.890: IKEv2:Failed to decrement count for outgoing negotiating *Nov 11 19:31:35.890: IKEv2:(SA ID = 2):SM Trace-> SA: I_SPI=0C33DB40DBAAADE6 R_SPI=F14E2BBA78024DE3 (I) MsgID = 00000003 CurState: CHILD_I_DONE Event: EV_CHECK_DUPE *Nov 11 19:31:35.890: IKEv2:(SA ID = 2):SM Trace-> SA: I_SPI=0C33DB40DBAAADE6 R_SPI=F14E2BBA78024DE3 (I) MsgID = 00000003 CurState: CHILD_I_DONE Event: EV_OK *Nov 11 19:31:35.890: IKEv2:(SA ID = 2):SM Trace-> SA: I_SPI=0C33DB40DBAAADE6 R_SPI=F14E2BBA78024DE3 (I) MsgID = 00000003 CurState: EXIT Event: EV_CHK_PENDING *Nov 11 19:31:35.890: IKEv2:(SA ID = 2):Processed response with message id 3, Requests can be sent from range 4 to 8 *Nov 11 19:31:35.890: IKEv2:(SA ID = 2):SM Trace-> SA: I_SPI=0C33DB40DBAAADE6 R_SPI=F14E2BBA78024DE3 (I) MsgID = 00000003CurState: EXITEvent: EV_NO_EVENT, *Nov 11 19:31:35.882: IKEv2:(SA ID = 2):Next payload: ENCR, version: 2.0 Exchange type:CREATE_CHILD_SA, flags:RESPONDER MSG-RESPONSEMessage id: 3, length: 300 Payload contents: ENCR Next payload: SA, reserved: 0x0, length: 272 *Nov 11 19:31:35.882: IKEv2:(SA ID = 2):SM Trace-> SA: I_SPI=0C33DB40DBAAADE6 R_SPI=F14E2BBA78024DE3 (R) MsgID = 00000003 CurState: CHILD_R_BLD_MSG Event:EV_CHK_IKE_REKEY *Nov 11 19:31:35.882: IKEv2:(SA ID = 2):SM Trace-> SA: I_SPI=0C33DB40DBAAADE6 R_SPI=F14E2BBA78024DE3 (R) MsgID = 00000003 CurState: CHILD_R_BLD_MSG Event: EV_GEN_SKEYID *Nov 11 19:31:35.882: IKEv2:(SA ID = 2):Generate skeyid *Nov 11 19:31:35.882: IKEv2:(SA ID = 2):SM Trace-> SA: I_SPI=0C33DB40DBAAADE6 R_SPI=F14E2BBA78024DE3 (R) MsgID = 00000003 CurState: CHILD_R_DONE Event:EV_ACTIVATE_NEW_SA *Nov 11 19:31:35.882: IKEv2:Store mib index ikev2 3, platform 62 *Nov 11 19:31:35.882: IKEv2:(SA ID = 2):SM Trace-> SA: I_SPI=0C33DB40DBAAADE6 R_SPI=F14E2BBA78024DE3 (R) MsgID = 00000003 CurState: CHILD_R_DONE Event: EV_UPDATE_CAC_STATS *Nov 11 19:31:35.882: IKEv2:New ikev2 sa request activated *Nov 11 19:31:35.882: IKEv2:Failed to decrement count for incoming negotiating *Nov 11 19:31:35.882: IKEv2:(SA ID = 2):SM Trace-> SA: I_SPI=0C33DB40DBAAADE6 R_SPI=F14E2BBA78024DE3 (R) MsgID = 00000003 CurState:CHILD_R_DONEEvent: EV_CHECK_DUPE *Nov 11 19:31:35.882: IKEv2:(SA ID = 2):SM Trace-> SA: I_SPI=0C33DB40DBAAADE6 R_SPI=F14E2BBA78024DE3 (R) MsgID = 00000003 CurState: CHILD_R_DONE Event: EV_OK *Nov 11 19:31:35.882: IKEv2:(SA ID = 2):SM Trace-> SA: I_SPI=0C33DB40DBAAADE6 R_SPI=F14E2BBA78024DE3 (R) MsgID = 00000003 CurState: CHILD_R_DONE Event: EV_START_DEL_NEG_TMR *Nov 11 19:31:35.882: IKEv2:(SA ID = 2):Action: Action_Null *Nov 11 19:31:35.882: IKEv2:(SA ID = 2):SM Trace-> SA: I_SPI=0C33DB40DBAAADE6 R_SPI=F14E2BBA78024DE3 (R) MsgID = 00000003 CurState: EXIT Event: EV_CHK_PENDING *Nov 11 19:31:35.882: IKEv2:(SA ID = 2):Sent response with message id 3, Requests can be accepted from range 4 to 8 *Nov 11 19:31:35.882: IKEv2:(SA ID = 2):SM Trace-> SA: I_SPI=0C33DB40DBAAADE6 R_SPI=F14E2BBA78024DE3 (R) MsgID = 00000003CurState: EXITEvent: EV_NO_EVENT. *Nov 11 19:30:34.835: IKEv2:KMI message 12 consumed. The vulnerability is due to incorrect handling of crafted IKEv2 SA-Init packets. #address 10.0.0.2. This is reposted from the Networking Academy area since there were no replies. My template for 'VPN Interface IPsec' looks like this: Then, this template is added under the Service VPN : I thought it was all working fine, however I now have a new problem.IKEv2 is working for Phase 1, but IPSEC is failing.For some reason the ISR4K is creating 16 SA's whilst Zscaler only support a maximum of 8 SA's, therefore the tunnel is currently unusable. If the proposal is acceptable to the responder, it sends identical TS payloads back. If this CREATE_CHILD_SA exchange is not rekeying an existing SA, the N payload MUST be omitted. An attacker could exploit this vulnerability by sending crafted IKEv2 SA-Init . I'm unsure if Viptela using IOS XE has this same capability. This is the CREATE_CHILD_SA response. Customers Also Viewed These Support Documents, Branch router, ISR4451-X, version 16.12.1b. 01:52 PM Initiates SA creation, *Nov 11 19:30:34.811: IKEv2:(SA ID = 1):SM Trace-> SA: I_SPI=F074D8BBD5A59F0B R_SPI=0000000000000000 (I) MsgID = 00000000 CurState: IDLE Event: EV_INIT_SA. Initiator building IKE_INIT_SA packet. Tunnel is up on the Initiator and the status shows. Cisco recommends that you have knowledge of the packet exchange for IKEv2. A vulnerability in the Internet Key Exchange Version 2 (IKEv2) implementation in Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to prevent IKEv2 from establishing new security associations.