l2tp/ipsec no longer works in ubuntu 22.04
Hey folks,
after the update from 21.10 to 22.04 beta my vpn connection via l2tp/ipsec is not working anymore.
```
Apr 03 14:30:02 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:02 my-XPS-13-9360 nm-l2tp-
Apr 03 14:30:02 my-XPS-13-9360 nm-l2tp-
Apr 03 14:30:02 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:04 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:04 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:04 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:04 my-XPS-13-9360 ipsec_starter[
Apr 03 14:30:04 my-XPS-13-9360 ipsec_starter[
Apr 03 14:30:04 my-XPS-13-9360 ipsec_starter[
Apr 03 14:30:04 my-XPS-13-9360 ipsec_starter[
Apr 03 14:30:04 my-XPS-13-9360 charon[186478]: 00[DMN] Starting IKE charon daemon (strongSwan 5.9.5, Linux 5.15.0-23-generic, x86_64)
Apr 03 14:30:04 my-XPS-13-9360 charon[186478]: 00[LIB] providers loaded by OpenSSL: legacy default
Apr 03 14:30:04 my-XPS-13-9360 charon[186478]: 00[CFG] loading ca certificates from '/etc/ipsec.
Apr 03 14:30:04 my-XPS-13-9360 charon[186478]: 00[CFG] loading aa certificates from '/etc/ipsec.
Apr 03 14:30:04 my-XPS-13-9360 charon[186478]: 00[CFG] loading ocsp signer certificates from '/etc/ipsec.
Apr 03 14:30:04 my-XPS-13-9360 charon[186478]: 00[CFG] loading attribute certificates from '/etc/ipsec.
Apr 03 14:30:04 my-XPS-13-9360 charon[186478]: 00[CFG] loading crls from '/etc/ipsec.d/crls'
Apr 03 14:30:04 my-XPS-13-9360 charon[186478]: 00[CFG] loading secrets from '/etc/ipsec.
Apr 03 14:30:04 my-XPS-13-9360 charon[186478]: 00[CFG] loading secrets from '/etc/ipsec.
Apr 03 14:30:04 my-XPS-13-9360 charon[186478]: 00[CFG] loaded IKE secret for %any
Apr 03 14:30:04 my-XPS-13-9360 charon[186478]: 00[LIB] loaded plugins: charon aesni aes rc2 sha2 sha1 md5 mgf1 random nonce x509 revocation constraints pubkey pkcs1 pkcs7 pkcs8 pkcs12 pgp dnskey sshkey pem openssl fips-prf gmp agent xcbc hmac gcm drbg attr kernel-netlink resolve socket-default connmark stroke updown eap-mschapv2 xauth-generic counters
Apr 03 14:30:04 my-XPS-13-9360 charon[186478]: 00[LIB] dropped capabilities, running as uid 0, gid 0
Apr 03 14:30:04 my-XPS-13-9360 charon[186478]: 00[JOB] spawning 16 worker threads
Apr 03 14:30:04 my-XPS-13-9360 ipsec_starter[
Apr 03 14:30:04 my-XPS-13-9360 charon[186478]: 05[CFG] received stroke: add connection '05dccbcf-
Apr 03 14:30:04 my-XPS-13-9360 charon[186478]: 05[CFG] added configuration '05dccbcf-
Apr 03 14:30:05 my-XPS-13-9360 charon[186478]: 07[CFG] rereading secrets
Apr 03 14:30:05 my-XPS-13-9360 charon[186478]: 07[CFG] loading secrets from '/etc/ipsec.
Apr 03 14:30:05 my-XPS-13-9360 charon[186478]: 07[CFG] loading secrets from '/etc/ipsec.
Apr 03 14:30:05 my-XPS-13-9360 charon[186478]: 07[CFG] loaded IKE secret for %any
Apr 03 14:30:05 my-XPS-13-9360 charon[186478]: 09[CFG] received stroke: initiate '05dccbcf-
Apr 03 14:30:05 my-XPS-13-9360 charon[186478]: 11[IKE] initiating Main Mode IKE_SA 05dccbcf-
Apr 03 14:30:05 my-XPS-13-9360 charon[186478]: 11[IKE] initiating Main Mode IKE_SA 05dccbcf-
Apr 03 14:30:05 my-XPS-13-9360 charon[186478]: 11[ENC] generating ID_PROT request 0 [ SA V V V V V ]
Apr 03 14:30:05 my-XPS-13-9360 charon[186478]: 11[NET] sending packet: from 192.168.0.27[500] to MASKED_IP[500] (532 bytes)
Apr 03 14:30:05 my-XPS-13-9360 charon[186478]: 12[NET] received packet: from MASKED_IP[500] to 192.168.0.27[500] (204 bytes)
Apr 03 14:30:05 my-XPS-13-9360 charon[186478]: 12[ENC] parsed ID_PROT response 0 [ SA V V V V V V ]
Apr 03 14:30:05 my-XPS-13-9360 charon[186478]: 12[IKE] received NAT-T (RFC 3947) vendor ID
Apr 03 14:30:05 my-XPS-13-9360 charon[186478]: 12[IKE] received draft-ietf-
Apr 03 14:30:05 my-XPS-13-9360 charon[186478]: 12[IKE] received draft-ietf-
Apr 03 14:30:05 my-XPS-13-9360 charon[186478]: 12[IKE] received draft-ietf-
Apr 03 14:30:05 my-XPS-13-9360 charon[186478]: 12[IKE] received draft-ietf-
Apr 03 14:30:05 my-XPS-13-9360 charon[186478]: 12[IKE] received DPD vendor ID
Apr 03 14:30:05 my-XPS-13-9360 charon[186478]: 12[CFG] selected proposal: IKE:AES_
Apr 03 14:30:05 my-XPS-13-9360 charon[186478]: 12[ENC] generating ID_PROT request 0 [ KE No NAT-D NAT-D ]
Apr 03 14:30:05 my-XPS-13-9360 charon[186478]: 12[NET] sending packet: from 192.168.0.27[500] to MASKED_IP[500] (396 bytes)
Apr 03 14:30:05 my-XPS-13-9360 charon[186478]: 13[NET] received packet: from MASKED_IP[500] to 192.168.0.27[500] (380 bytes)
Apr 03 14:30:05 my-XPS-13-9360 charon[186478]: 13[ENC] parsed ID_PROT response 0 [ KE No NAT-D NAT-D ]
Apr 03 14:30:05 my-XPS-13-9360 charon[186478]: 13[IKE] local host is behind NAT, sending keep alives
Apr 03 14:30:05 my-XPS-13-9360 charon[186478]: 13[ENC] generating ID_PROT request 0 [ ID HASH ]
Apr 03 14:30:05 my-XPS-13-9360 charon[186478]: 13[NET] sending packet: from 192.168.0.27[4500] to MASKED_IP[4500] (92 bytes)
Apr 03 14:30:05 my-XPS-13-9360 charon[186478]: 14[NET] received packet: from MASKED_IP[4500] to 192.168.0.27[4500] (76 bytes)
Apr 03 14:30:05 my-XPS-13-9360 charon[186478]: 14[ENC] parsed ID_PROT response 0 [ ID HASH ]
Apr 03 14:30:05 my-XPS-13-9360 charon[186478]: 14[IKE] IKE_SA 05dccbcf-
Apr 03 14:30:05 my-XPS-13-9360 charon[186478]: 14[IKE] IKE_SA 05dccbcf-
Apr 03 14:30:05 my-XPS-13-9360 charon[186478]: 14[IKE] scheduling reauthentication in 10067s
Apr 03 14:30:05 my-XPS-13-9360 charon[186478]: 14[IKE] maximum IKE_SA lifetime 10607s
Apr 03 14:30:05 my-XPS-13-9360 charon[186478]: 14[ENC] generating QUICK_MODE request 298736924 [ HASH SA No ID ID NAT-OA NAT-OA ]
Apr 03 14:30:05 my-XPS-13-9360 charon[186478]: 14[NET] sending packet: from 192.168.0.27[4500] to MASKED_IP[4500] (268 bytes)
Apr 03 14:30:05 my-XPS-13-9360 charon[186478]: 15[NET] received packet: from MASKED_IP[4500] to 192.168.0.27[4500] (188 bytes)
Apr 03 14:30:05 my-XPS-13-9360 charon[186478]: 15[ENC] parsed QUICK_MODE response 298736924 [ HASH SA No ID ID NAT-OA NAT-OA ]
Apr 03 14:30:05 my-XPS-13-9360 charon[186478]: 15[CFG] selected proposal: ESP:AES_
Apr 03 14:30:05 my-XPS-13-9360 charon[186478]: 15[IKE] CHILD_SA 05dccbcf-
Apr 03 14:30:05 my-XPS-13-9360 charon[186478]: 15[IKE] CHILD_SA 05dccbcf-
Apr 03 14:30:05 my-XPS-13-9360 charon[186478]: 15[ENC] generating QUICK_MODE request 298736924 [ HASH ]
Apr 03 14:30:05 my-XPS-13-9360 charon[186478]: 15[NET] sending packet: from 192.168.0.27[4500] to MASKED_IP[4500] (76 bytes)
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:05 my-XPS-13-9360 nm-l2tp-
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:06 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:06 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:06 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:06 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:07 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:07 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:07 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:07 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:08 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:08 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:08 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:08 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:09 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:09 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:09 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:09 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:10 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:10 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:10 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:10 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:11 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:11 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:12 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:12 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:12 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:12 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:12 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:12 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:13 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:13 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:14 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:14 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:14 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:14 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:15 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:15 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:15 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:15 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:16 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:16 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:16 my-XPS-13-9360 charon[186478]: 11[NET] received packet: from MASKED_IP[4500] to 192.168.0.27[4500] (108 bytes)
Apr 03 14:30:16 my-XPS-13-9360 charon[186478]: 11[ENC] parsed INFORMATIONAL_V1 request 2247583804 [ HASH N(DPD) ]
Apr 03 14:30:16 my-XPS-13-9360 charon[186478]: 11[ENC] generating INFORMATIONAL_V1 request 2426815212 [ HASH N(DPD_ACK) ]
Apr 03 14:30:16 my-XPS-13-9360 charon[186478]: 11[NET] sending packet: from 192.168.0.27[4500] to MASKED_IP[4500] (108 bytes)
Apr 03 14:30:16 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:16 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:17 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:17 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:17 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:17 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:18 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:18 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:18 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:18 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:19 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:19 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:19 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:19 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:19 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:19 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:19 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:19 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:19 my-XPS-13-9360 NetworkManager[
Apr 03 14:30:19 my-XPS-13-9360 charon[186478]: 00[DMN] SIGINT received, shutting down
Apr 03 14:30:19 my-XPS-13-9360 charon[186478]: 00[IKE] closing CHILD_SA 05dccbcf-
Apr 03 14:30:19 my-XPS-13-9360 charon[186478]: 00[IKE] closing CHILD_SA 05dccbcf-
Apr 03 14:30:19 my-XPS-13-9360 charon[186478]: 00[IKE] sending DELETE for ESP CHILD_SA with SPI c4bf26e4
Apr 03 14:30:19 my-XPS-13-9360 charon[186478]: 00[ENC] generating INFORMATIONAL_V1 request 4079735552 [ HASH D ]
Apr 03 14:30:19 my-XPS-13-9360 charon[186478]: 00[NET] sending packet: from 192.168.0.27[4500] to MASKED_IP[4500] (92 bytes)
Apr 03 14:30:19 my-XPS-13-9360 charon[186478]: 00[IKE] deleting IKE_SA 05dccbcf-
Apr 03 14:30:19 my-XPS-13-9360 charon[186478]: 00[IKE] deleting IKE_SA 05dccbcf-
Apr 03 14:30:19 my-XPS-13-9360 charon[186478]: 00[IKE] sending DELETE for IKE_SA 05dccbcf-
Apr 03 14:30:19 my-XPS-13-9360 charon[186478]: 00[ENC] generating INFORMATIONAL_V1 request 578498206 [ HASH D ]
Apr 03 14:30:19 my-XPS-13-9360 charon[186478]: 00[NET] sending packet: from 192.168.0.27[4500] to MASKED_IP[4500] (108 bytes)
Apr 03 14:30:19 my-XPS-13-9360 ipsec_starter[
Apr 03 14:30:19 my-XPS-13-9360 ipsec_starter[
Apr 03 14:30:19 my-XPS-13-9360 ipsec_starter[
Apr 03 14:30:19 my-XPS-13-9360 ipsec_starter[
Apr 03 14:30:20 my-XPS-13-9360 nm-l2tp-
```
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