Ubuntu

l2tp/ipsec no longer works in ubuntu 22.04

Asked by Bernd

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[3645]: <info> [1648989002.2837] audit: op="connection-activate" uuid="05dccbcf-22ef-4b17-b152-3899dc4fc231" name="work outofoffice" pid=8156 uid=1000 result="success"
Apr 03 14:30:02 my-XPS-13-9360 nm-l2tp-service[186365]: Check port 1701
Apr 03 14:30:02 my-XPS-13-9360 nm-l2tp-service[186365]: Can't bind to port 1701
Apr 03 14:30:02 my-XPS-13-9360 NetworkManager[186380]: Stopping strongSwan IPsec failed: starter is not running
Apr 03 14:30:04 my-XPS-13-9360 NetworkManager[186377]: Starting strongSwan 5.9.5 IPsec [starter]...
Apr 03 14:30:04 my-XPS-13-9360 NetworkManager[186377]: Loading config setup
Apr 03 14:30:04 my-XPS-13-9360 NetworkManager[186377]: Loading conn '05dccbcf-22ef-4b17-b152-3899dc4fc231'
Apr 03 14:30:04 my-XPS-13-9360 ipsec_starter[186377]: Starting strongSwan 5.9.5 IPsec [starter]...
Apr 03 14:30:04 my-XPS-13-9360 ipsec_starter[186377]: Loading config setup
Apr 03 14:30:04 my-XPS-13-9360 ipsec_starter[186377]: Loading conn '05dccbcf-22ef-4b17-b152-3899dc4fc231'
Apr 03 14:30:04 my-XPS-13-9360 ipsec_starter[186477]: Attempting to start charon...
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.d/cacerts'
Apr 03 14:30:04 my-XPS-13-9360 charon[186478]: 00[CFG] loading aa certificates from '/etc/ipsec.d/aacerts'
Apr 03 14:30:04 my-XPS-13-9360 charon[186478]: 00[CFG] loading ocsp signer certificates from '/etc/ipsec.d/ocspcerts'
Apr 03 14:30:04 my-XPS-13-9360 charon[186478]: 00[CFG] loading attribute certificates from '/etc/ipsec.d/acerts'
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.secrets'
Apr 03 14:30:04 my-XPS-13-9360 charon[186478]: 00[CFG] loading secrets from '/etc/ipsec.d/ipsec.nm-l2tp.secrets'
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[186477]: charon (186478) started after 40 ms
Apr 03 14:30:04 my-XPS-13-9360 charon[186478]: 05[CFG] received stroke: add connection '05dccbcf-22ef-4b17-b152-3899dc4fc231'
Apr 03 14:30:04 my-XPS-13-9360 charon[186478]: 05[CFG] added configuration '05dccbcf-22ef-4b17-b152-3899dc4fc231'
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.secrets'
Apr 03 14:30:05 my-XPS-13-9360 charon[186478]: 07[CFG] loading secrets from '/etc/ipsec.d/ipsec.nm-l2tp.secrets'
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-22ef-4b17-b152-3899dc4fc231'
Apr 03 14:30:05 my-XPS-13-9360 charon[186478]: 11[IKE] initiating Main Mode IKE_SA 05dccbcf-22ef-4b17-b152-3899dc4fc231[1] to MASKED_IP
Apr 03 14:30:05 my-XPS-13-9360 charon[186478]: 11[IKE] initiating Main Mode IKE_SA 05dccbcf-22ef-4b17-b152-3899dc4fc231[1] to MASKED_IP
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-ipsec-nat-t-ike-03 vendor ID
Apr 03 14:30:05 my-XPS-13-9360 charon[186478]: 12[IKE] received draft-ietf-ipsec-nat-t-ike-02\n vendor ID
Apr 03 14:30:05 my-XPS-13-9360 charon[186478]: 12[IKE] received draft-ietf-ipsec-nat-t-ike-02 vendor ID
Apr 03 14:30:05 my-XPS-13-9360 charon[186478]: 12[IKE] received draft-ietf-ipsec-nat-t-ike-00 vendor ID
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_CBC_256/HMAC_SHA2_256_128/PRF_HMAC_SHA2_256/MODP_2048
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-22ef-4b17-b152-3899dc4fc231[1] established between 192.168.0.27[192.168.0.27]...MASKED_IP[172.31.44.31]
Apr 03 14:30:05 my-XPS-13-9360 charon[186478]: 14[IKE] IKE_SA 05dccbcf-22ef-4b17-b152-3899dc4fc231[1] established between 192.168.0.27[192.168.0.27]...MASKED_IP[172.31.44.31]
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_CBC_256/HMAC_SHA1_96/NO_EXT_SEQ
Apr 03 14:30:05 my-XPS-13-9360 charon[186478]: 15[IKE] CHILD_SA 05dccbcf-22ef-4b17-b152-3899dc4fc231{1} established with SPIs c4bf26e4_i a5538f9e_o and TS 192.168.0.27/32[udp] === MASKED_IP/32[udp/l2f]
Apr 03 14:30:05 my-XPS-13-9360 charon[186478]: 15[IKE] CHILD_SA 05dccbcf-22ef-4b17-b152-3899dc4fc231{1} established with SPIs c4bf26e4_i a5538f9e_o and TS 192.168.0.27/32[udp] === MASKED_IP/32[udp/l2f]
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[186507]: initiating Main Mode IKE_SA 05dccbcf-22ef-4b17-b152-3899dc4fc231[1] to MASKED_IP
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[186507]: generating ID_PROT request 0 [ SA V V V V V ]
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[186507]: sending packet: from 192.168.0.27[500] to MASKED_IP[500] (532 bytes)
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[186507]: received packet: from MASKED_IP[500] to 192.168.0.27[500] (204 bytes)
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[186507]: parsed ID_PROT response 0 [ SA V V V V V V ]
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[186507]: received NAT-T (RFC 3947) vendor ID
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[186507]: received draft-ietf-ipsec-nat-t-ike-03 vendor ID
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[186507]: received draft-ietf-ipsec-nat-t-ike-02\n vendor ID
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[186507]: received draft-ietf-ipsec-nat-t-ike-02 vendor ID
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[186507]: received draft-ietf-ipsec-nat-t-ike-00 vendor ID
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[186507]: received DPD vendor ID
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[186507]: selected proposal: IKE:AES_CBC_256/HMAC_SHA2_256_128/PRF_HMAC_SHA2_256/MODP_2048
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[186507]: generating ID_PROT request 0 [ KE No NAT-D NAT-D ]
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[186507]: sending packet: from 192.168.0.27[500] to MASKED_IP[500] (396 bytes)
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[186507]: received packet: from MASKED_IP[500] to 192.168.0.27[500] (380 bytes)
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[186507]: parsed ID_PROT response 0 [ KE No NAT-D NAT-D ]
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[186507]: local host is behind NAT, sending keep alives
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[186507]: generating ID_PROT request 0 [ ID HASH ]
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[186507]: sending packet: from 192.168.0.27[4500] to MASKED_IP[4500] (92 bytes)
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[186507]: received packet: from MASKED_IP[4500] to 192.168.0.27[4500] (76 bytes)
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[186507]: parsed ID_PROT response 0 [ ID HASH ]
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[186507]: IKE_SA 05dccbcf-22ef-4b17-b152-3899dc4fc231[1] established between 192.168.0.27[192.168.0.27]...MASKED_IP[172.31.44.31]
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[186507]: scheduling reauthentication in 10067s
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[186507]: maximum IKE_SA lifetime 10607s
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[186507]: generating QUICK_MODE request 298736924 [ HASH SA No ID ID NAT-OA NAT-OA ]
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[186507]: sending packet: from 192.168.0.27[4500] to MASKED_IP[4500] (268 bytes)
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[186507]: received packet: from MASKED_IP[4500] to 192.168.0.27[4500] (188 bytes)
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[186507]: parsed QUICK_MODE response 298736924 [ HASH SA No ID ID NAT-OA NAT-OA ]
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[186507]: selected proposal: ESP:AES_CBC_256/HMAC_SHA1_96/NO_EXT_SEQ
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[186507]: CHILD_SA 05dccbcf-22ef-4b17-b152-3899dc4fc231{1} established with SPIs c4bf26e4_i a5538f9e_o and TS 192.168.0.27/32[udp] === MASKED_IP/32[udp/l2f]
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[186507]: generating QUICK_MODE request 298736924 [ HASH ]
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[186507]: connection '05dccbcf-22ef-4b17-b152-3899dc4fc231' established successfully
Apr 03 14:30:05 my-XPS-13-9360 nm-l2tp-service[186365]: xl2tpd started with pid 186513
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: Not looking for kernel SAref support.
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: Using l2tp kernel support.
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: xl2tpd version xl2tpd-1.3.16 started on my-XPS-13-9360 PID:186513
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: Written by Mark Spencer, Copyright (C) 1998, Adtran, Inc.
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: Forked by Scott Balmos and David Stipp, (C) 2001
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: Inherited by Jeff McAdams, (C) 2002
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: Forked again by Xelerance (www.xelerance.com) (C) 2006-2016
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: Listening on IP address 0.0.0.0, port 43559
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: Connecting to host MASKED_IP, port 1701
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: Can not find tunnel 83 (refhim=0)
Apr 03 14:30:05 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: network_thread: unable to find call or tunnel to handle packet. call = 23931, tunnel = 83 Dumping.
Apr 03 14:30:06 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: Can not find tunnel 83 (refhim=0)
Apr 03 14:30:06 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: network_thread: unable to find call or tunnel to handle packet. call = 23931, tunnel = 83 Dumping.
Apr 03 14:30:06 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: Can not find tunnel 83 (refhim=0)
Apr 03 14:30:06 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: network_thread: unable to find call or tunnel to handle packet. call = 23931, tunnel = 83 Dumping.
Apr 03 14:30:07 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: Can not find tunnel 83 (refhim=0)
Apr 03 14:30:07 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: network_thread: unable to find call or tunnel to handle packet. call = 23931, tunnel = 83 Dumping.
Apr 03 14:30:07 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: Can not find tunnel 83 (refhim=0)
Apr 03 14:30:07 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: network_thread: unable to find call or tunnel to handle packet. call = 23931, tunnel = 83 Dumping.
Apr 03 14:30:08 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: Can not find tunnel 83 (refhim=0)
Apr 03 14:30:08 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: network_thread: unable to find call or tunnel to handle packet. call = 23931, tunnel = 83 Dumping.
Apr 03 14:30:08 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: Can not find tunnel 83 (refhim=0)
Apr 03 14:30:08 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: network_thread: unable to find call or tunnel to handle packet. call = 23931, tunnel = 83 Dumping.
Apr 03 14:30:09 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: Can not find tunnel 83 (refhim=0)
Apr 03 14:30:09 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: network_thread: unable to find call or tunnel to handle packet. call = 23931, tunnel = 83 Dumping.
Apr 03 14:30:09 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: Can not find tunnel 83 (refhim=0)
Apr 03 14:30:09 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: network_thread: unable to find call or tunnel to handle packet. call = 23931, tunnel = 83 Dumping.
Apr 03 14:30:10 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: Can not find tunnel 83 (refhim=0)
Apr 03 14:30:10 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: network_thread: unable to find call or tunnel to handle packet. call = 23931, tunnel = 83 Dumping.
Apr 03 14:30:10 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: Can not find tunnel 83 (refhim=0)
Apr 03 14:30:10 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: network_thread: unable to find call or tunnel to handle packet. call = 23931, tunnel = 83 Dumping.
Apr 03 14:30:11 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: Can not find tunnel 83 (refhim=0)
Apr 03 14:30:11 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: network_thread: unable to find call or tunnel to handle packet. call = 23931, tunnel = 83 Dumping.
Apr 03 14:30:12 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: Can not find tunnel 83 (refhim=0)
Apr 03 14:30:12 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: network_thread: unable to find call or tunnel to handle packet. call = 23931, tunnel = 83 Dumping.
Apr 03 14:30:12 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: Can not find tunnel 83 (refhim=0)
Apr 03 14:30:12 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: network_thread: unable to find call or tunnel to handle packet. call = 23931, tunnel = 83 Dumping.
Apr 03 14:30:12 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: Can not find tunnel 83 (refhim=0)
Apr 03 14:30:12 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: network_thread: unable to find call or tunnel to handle packet. call = 23931, tunnel = 83 Dumping.
Apr 03 14:30:13 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: Can not find tunnel 83 (refhim=0)
Apr 03 14:30:13 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: network_thread: unable to find call or tunnel to handle packet. call = 23931, tunnel = 83 Dumping.
Apr 03 14:30:14 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: Can not find tunnel 83 (refhim=0)
Apr 03 14:30:14 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: network_thread: unable to find call or tunnel to handle packet. call = 23931, tunnel = 83 Dumping.
Apr 03 14:30:14 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: Can not find tunnel 83 (refhim=0)
Apr 03 14:30:14 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: network_thread: unable to find call or tunnel to handle packet. call = 23931, tunnel = 83 Dumping.
Apr 03 14:30:15 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: Can not find tunnel 83 (refhim=0)
Apr 03 14:30:15 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: network_thread: unable to find call or tunnel to handle packet. call = 23931, tunnel = 83 Dumping.
Apr 03 14:30:15 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: Can not find tunnel 83 (refhim=0)
Apr 03 14:30:15 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: network_thread: unable to find call or tunnel to handle packet. call = 23931, tunnel = 83 Dumping.
Apr 03 14:30:16 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: Can not find tunnel 83 (refhim=0)
Apr 03 14:30:16 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: network_thread: unable to find call or tunnel to handle packet. call = 23931, tunnel = 83 Dumping.
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[186513]: xl2tpd[186513]: Can not find tunnel 83 (refhim=0)
Apr 03 14:30:16 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: network_thread: unable to find call or tunnel to handle packet. call = 23931, tunnel = 83 Dumping.
Apr 03 14:30:17 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: Can not find tunnel 83 (refhim=0)
Apr 03 14:30:17 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: network_thread: unable to find call or tunnel to handle packet. call = 23931, tunnel = 83 Dumping.
Apr 03 14:30:17 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: Can not find tunnel 83 (refhim=0)
Apr 03 14:30:17 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: network_thread: unable to find call or tunnel to handle packet. call = 23931, tunnel = 83 Dumping.
Apr 03 14:30:18 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: Can not find tunnel 83 (refhim=0)
Apr 03 14:30:18 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: network_thread: unable to find call or tunnel to handle packet. call = 23931, tunnel = 83 Dumping.
Apr 03 14:30:18 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: Can not find tunnel 83 (refhim=0)
Apr 03 14:30:18 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: network_thread: unable to find call or tunnel to handle packet. call = 23931, tunnel = 83 Dumping.
Apr 03 14:30:19 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: Can not find tunnel 83 (refhim=0)
Apr 03 14:30:19 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: network_thread: unable to find call or tunnel to handle packet. call = 23931, tunnel = 83 Dumping.
Apr 03 14:30:19 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: Can not find tunnel 83 (refhim=0)
Apr 03 14:30:19 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: network_thread: unable to find call or tunnel to handle packet. call = 23931, tunnel = 83 Dumping.
Apr 03 14:30:19 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: death_handler: Fatal signal 15 received
Apr 03 14:30:19 my-XPS-13-9360 NetworkManager[186513]: xl2tpd[186513]: Connection 0 closed to MASKED_IP, port 1701 (Server closing)
Apr 03 14:30:19 my-XPS-13-9360 NetworkManager[3645]: <warn> [1648989019.8854] vpn[0x55e942c66940,05dccbcf-22ef-4b17-b152-3899dc4fc231,"work outofoffice"]: dbus: failure: connect-failed (1)
Apr 03 14:30:19 my-XPS-13-9360 NetworkManager[3645]: <warn> [1648989019.8856] vpn[0x55e942c66940,05dccbcf-22ef-4b17-b152-3899dc4fc231,"work outofoffice"]: dbus: failure: connect-failed (1)
Apr 03 14:30:19 my-XPS-13-9360 NetworkManager[186619]: Stopping strongSwan IPsec...
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-22ef-4b17-b152-3899dc4fc231{1} with SPIs c4bf26e4_i (2548 bytes) a5538f9e_o (544 bytes) and TS 192.168.0.27/32[udp] === MASKED_IP/32[udp/l2f]
Apr 03 14:30:19 my-XPS-13-9360 charon[186478]: 00[IKE] closing CHILD_SA 05dccbcf-22ef-4b17-b152-3899dc4fc231{1} with SPIs c4bf26e4_i (2548 bytes) a5538f9e_o (544 bytes) and TS 192.168.0.27/32[udp] === MASKED_IP/32[udp/l2f]
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-22ef-4b17-b152-3899dc4fc231[1] between 192.168.0.27[192.168.0.27]...MASKED_IP[172.31.44.31]
Apr 03 14:30:19 my-XPS-13-9360 charon[186478]: 00[IKE] deleting IKE_SA 05dccbcf-22ef-4b17-b152-3899dc4fc231[1] between 192.168.0.27[192.168.0.27]...MASKED_IP[172.31.44.31]
Apr 03 14:30:19 my-XPS-13-9360 charon[186478]: 00[IKE] sending DELETE for IKE_SA 05dccbcf-22ef-4b17-b152-3899dc4fc231[1]
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[186477]: child 186478 (charon) has quit (exit code 0)
Apr 03 14:30:19 my-XPS-13-9360 ipsec_starter[186477]:
Apr 03 14:30:19 my-XPS-13-9360 ipsec_starter[186477]: charon stopped after 200 ms
Apr 03 14:30:19 my-XPS-13-9360 ipsec_starter[186477]: ipsec starter stopped
Apr 03 14:30:20 my-XPS-13-9360 nm-l2tp-service[186365]: ipsec shut down
```

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Kirill Kozlovskiy (kirill-k2) said : 		#1

Same here. According to microtik server connection log fails after ipsec phase1.

On the client side:
...
Apr 04 11:44:10 pc nm-l2tp-service[12269]: xl2tpd started with pid 12333
Apr 04 11:44:10 pc NetworkManager[12333]: xl2tpd[12333]: Not looking for kernel SAref support.
Apr 04 11:44:10 pc NetworkManager[12333]: xl2tpd[12333]: Using l2tp kernel support.
Apr 04 11:44:10 pc NetworkManager[12333]: xl2tpd[12333]: xl2tpd version xl2tpd-1.3.16 started on pc PID:12333
Apr 04 11:44:10 pc NetworkManager[12333]: xl2tpd[12333]: Written by Mark Spencer, Copyright (C) 1998, Adtran, Inc.
Apr 04 11:44:10 pc NetworkManager[12333]: xl2tpd[12333]: Forked by Scott Balmos and David Stipp, (C) 2001
Apr 04 11:44:10 pc NetworkManager[12333]: xl2tpd[12333]: Inherited by Jeff McAdams, (C) 2002
Apr 04 11:44:10 pc NetworkManager[12333]: xl2tpd[12333]: Forked again by Xelerance (www.xelerance.com) (C) 2006-2016
Apr 04 11:44:10 pc NetworkManager[12333]: xl2tpd[12333]: Listening on IP address 0.0.0.0, port 1701
Apr 04 11:44:10 pc NetworkManager[12333]: xl2tpd[12333]: Connecting to host 185.105.168.95, port 1701
Apr 04 11:44:10 pc NetworkManager[12333]: xl2tpd[12333]: Can not find tunnel 98 (refhim=0)
Apr 04 11:44:10 pc NetworkManager[12333]: xl2tpd[12333]: network_thread: unable to find call or tunnel to handle packet. call = 21621, tunnel = 98 Dumping.
Apr 04 11:44:11 pc NetworkManager[12333]: xl2tpd[12333]: Can not find tunnel 98 (refhim=0)
Apr 04 11:44:11 pc NetworkManager[12333]: xl2tpd[12333]: network_thread: unable to find call or tunnel to handle packet. call = 21621, tunnel = 98 Dumping.
Apr 04 11:44:11 pc NetworkManager[12333]: xl2tpd[12333]: Can not find tunnel 12 (refhim=0)
Apr 04 11:44:11 pc NetworkManager[12333]: xl2tpd[12333]: network_thread: unable to find call or tunnel to handle packet. call = 21621, tunnel = 12 Dumping.

Revision history for this message
Kirill Kozlovskiy (kirill-k2) said : 		#2

I've managed the issue by downgrading xl2tpd package to 1.3.12-1.1 - got it from https://packages.ubuntu.com/impish/amd64/xl2tpd/download

This workaround was inspired by https://github.com/xelerance/xl2tpd/issues/230

Revision history for this message
Bernd (badsmoke) said : 		#3

ok thanks

of course it should still be marked as a "bug" for 22.04?

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Kirill Kozlovskiy (kirill-k2) said : 		#4

I guess so. Let's try: https://bugs.launchpad.net/ubuntu/+bug/1968336

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Douglas Kosovic (dkosovic) said : 		#5

For those using network-manager-l2tp, another workaround is to use Katalix go-l2tp which is from the authors of the L2TP kernel modules (which xl2tpd also happens to use).

With Networkmanager-l2tp >= 1.20.0, it has switched to kl2tpd as the default L2TP daemon and falls back to xl2tpd if it can't find it. kl2tpd can readily be installed with :

sudo apt install golang-go

go install "github.com/katalix/go-l2tp/...@latest"
sudo mkdir /usr/local/sbin
sudo cp go/bin/kl2tpd /usr/local/sbin

Can you help with this problem?

Provide an answer of your own, or ask Bernd for more information if necessary.

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