IPSec IKEv2 reauthentication is not working
Closed, ResolvedPublicBUG
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Authored By

	SrividyaA
	Jun 16 2025, 10:12 AM

Description

Description: Tested the ikev2 reauthentication in 1.4.1 and recent 1.5 version and it does not seem to work.

Initiator:

set vpn ipsec authentication psk VPN_01 id '10.110.2.52'
set vpn ipsec authentication psk VPN_01 secret 'vyos'
set vpn ipsec esp-group esp01 lifetime '1800'
set vpn ipsec esp-group esp01 mode 'tunnel'
set vpn ipsec esp-group esp01 pfs 'dh-group19'
set vpn ipsec esp-group esp01 proposal 10 encryption 'aes128'
set vpn ipsec esp-group esp01 proposal 10 hash 'sha512'
set vpn ipsec ike-group IKEv2_re ikev2-reauth
set vpn ipsec ike-group IKEv2_re key-exchange 'ikev2'
set vpn ipsec ike-group IKEv2_re lifetime '3600'
set vpn ipsec ike-group IKEv2_re proposal 10 dh-group '20'
set vpn ipsec ike-group IKEv2_re proposal 10 encryption 'aes256'
set vpn ipsec ike-group IKEv2_re proposal 10 hash 'sha512'
set vpn ipsec interface 'eth0'
set vpn ipsec options disable-route-autoinstall
set vpn ipsec site-to-site peer vpn_01 authentication local-id '10.110.2.52'
set vpn ipsec site-to-site peer vpn_01 authentication mode 'pre-shared-secret'
set vpn ipsec site-to-site peer vpn_01 authentication remote-id '10.110.1.52'
set vpn ipsec site-to-site peer vpn_01 ike-group 'IKEv2_re'
set vpn ipsec site-to-site peer vpn_01 ikev2-reauth 'yes'
set vpn ipsec site-to-site peer vpn_01 local-address '10.110.2.52'
set vpn ipsec site-to-site peer vpn_01 remote-address '10.110.1.52'
set vpn ipsec site-to-site peer vpn_01 vti bind 'vti01'
set vpn ipsec site-to-site peer vpn_01 vti esp-group 'esp01'

Responder:

set vpn ipsec esp-group esp01 lifetime '1800'
set vpn ipsec esp-group esp01 mode 'tunnel'
set vpn ipsec esp-group esp01 pfs 'dh-group19'
set vpn ipsec esp-group esp01 proposal 10 encryption 'aes128'
set vpn ipsec esp-group esp01 proposal 10 hash 'sha512'
set vpn ipsec ike-group IKEv2_re ikev2-reauth
set vpn ipsec ike-group IKEv2_re key-exchange 'ikev2'
set vpn ipsec ike-group IKEv2_re lifetime '3600'
set vpn ipsec ike-group IKEv2_re proposal 10 dh-group '20'
set vpn ipsec ike-group IKEv2_re proposal 10 encryption 'aes256'
set vpn ipsec ike-group IKEv2_re proposal 10 hash 'sha512'
set vpn ipsec interface 'eth0'
set vpn ipsec options disable-route-autoinstall
set vpn ipsec site-to-site peer vpn_02 authentication local-id '10.110.1.52'
set vpn ipsec site-to-site peer vpn_02 authentication mode 'pre-shared-secret'
set vpn ipsec site-to-site peer vpn_02 authentication remote-id '10.110.2.52'
set vpn ipsec site-to-site peer vpn_02 connection-type 'respond'
set vpn ipsec site-to-site peer vpn_02 ike-group 'IKEv2_re'
set vpn ipsec site-to-site peer vpn_02 ikev2-reauth 'yes'
set vpn ipsec site-to-site peer vpn_02 local-address '10.110.1.52'
set vpn ipsec site-to-site peer vpn_02 remote-address '10.110.2.52'
set vpn ipsec site-to-site peer vpn_02 vti bind 'vti01'
set vpn ipsec site-to-site peer vpn_02 vti esp-group 'esp01'

Output:

vpn_01: #162, ESTABLISHED, IKEv2, 33477fa8a3a7a1c5_i* b3f8d0c85845d273_r
  local  '10.110.2.52' @ 10.110.2.52[4500]
  remote '10.110.1.52' @ 10.110.1.52[4500]
  AES_CBC-256/HMAC_SHA2_512_256/PRF_HMAC_SHA2_512/ECP_384
  established 1628s ago, rekeying in 1947s
  vpn_01-vti: #166, reqid 1, INSTALLED, TUNNEL, ESP:AES_CBC-128/HMAC_SHA2_512_256/ECP_256
    installed 427s ago, rekeying in 1096s, expires in 1373s
    in  cb90c4df (-|0x00000002),   5040 bytes,    60 packets,    17s ago
    out c885700d (-|0x00000002),   5040 bytes,    60 packets,    15s ago
    local  0.0.0.0/0 ::/0
    remote 0.0.0.0/0 ::/0

reauth_time is not added in the connected status and no logs found for reauthentication.

Attached swanctl.conf file{F15268923}

Strongswan does seem to support reauthentication:

https://docs.strongswan.org/docs/5.9/config/rekeying.html#_reauthentication