[GH-ISSUE #185] Not working on Ubuntu 20.04 #170

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opened 2026-03-02 07:44:25 +03:00 by kerem · 1 comment

kerem commented

2026-03-02 07:44:25 +03:00

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Originally created by @vlasick on GitHub (May 2, 2020).
Original GitHub issue: https://github.com/hwdsl2/docker-ipsec-vpn-server/issues/185

Doker logs with running:

ipsec-vpn-server_1  | xl2tpd[1]: Not looking for kernel SAref support.
ipsec-vpn-server_1  | xl2tpd[1]: L2TP kernel support not detected (try modprobing l2tp_ppp and pppol2tp

Doker logs with trying to connect from client:

ipsec-vpn-server_1  | /usr/sbin/pppd: Please load the ppp_generic kernel module.
ipsec-vpn-server_1  |
ipsec-vpn-server_1  | xl2tpd[1]: child_handler : pppd exited for call 2657 with code 4
ipsec-vpn-server_1  | xl2tpd[1]: call_close: Call 25735 to XXX.XXX.XXX.XXX disconnected
ipsec-vpn-server_1  | xl2tpd[1]: result_code_avp: result code endianness fix for buggy Apple client. network=768, le=3
ipsec-vpn-server_1  | xl2tpd[1]: control_finish: Connection closed to XXX.XXX.XXX.XXX, serial 1 ()
ipsec-vpn-server_1  | xl2tpd[1]: Terminating pppd: sending TERM signal to pid 297
ipsec-vpn-server_1  | xl2tpd[1]: result_code_avp: result code endianness fix for buggy Apple client. network=256, le=1

Trying to modprobe l2tp_ppp:

$ sudo modprobe l2tp_ppp
modprobe: FATAL: Module l2tp_ppp not found in directory /lib/modules/5.4.0-1009-kvm

Originally created by @vlasick on GitHub (May 2, 2020). Original GitHub issue: https://github.com/hwdsl2/docker-ipsec-vpn-server/issues/185 Doker logs with running: ``` ipsec-vpn-server_1 | xl2tpd[1]: Not looking for kernel SAref support. ipsec-vpn-server_1 | xl2tpd[1]: L2TP kernel support not detected (try modprobing l2tp_ppp and pppol2tp ``` Doker logs with trying to connect from client: ``` ipsec-vpn-server_1 | /usr/sbin/pppd: Please load the ppp_generic kernel module. ipsec-vpn-server_1 | ipsec-vpn-server_1 | xl2tpd[1]: child_handler : pppd exited for call 2657 with code 4 ipsec-vpn-server_1 | xl2tpd[1]: call_close: Call 25735 to XXX.XXX.XXX.XXX disconnected ipsec-vpn-server_1 | xl2tpd[1]: result_code_avp: result code endianness fix for buggy Apple client. network=768, le=3 ipsec-vpn-server_1 | xl2tpd[1]: control_finish: Connection closed to XXX.XXX.XXX.XXX, serial 1 () ipsec-vpn-server_1 | xl2tpd[1]: Terminating pppd: sending TERM signal to pid 297 ipsec-vpn-server_1 | xl2tpd[1]: result_code_avp: result code endianness fix for buggy Apple client. network=256, le=1 ``` Trying to modprobe l2tp_ppp: ``` $ sudo modprobe l2tp_ppp modprobe: FATAL: Module l2tp_ppp not found in directory /lib/modules/5.4.0-1009-kvm ```

kerem closed this issue

2026-03-02 07:44:26 +03:00

kerem commented

2026-03-02 07:44:26 +03:00

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@hwdsl2 commented on GitHub (May 2, 2020):

@vlasick Hello! This Docker image has been tested on Ubuntu 20.04 and works fine. It is likely that your server lacks PPP kernel support. Try modprobe ppp_generic from your Docker host. Then re-create the Docker container. If that does not work and /dev/ppp does not exist on your Docker host, then it is likely an issue with your host server's Linux kernel.

@hwdsl2 commented on GitHub (May 2, 2020): @vlasick Hello! This Docker image has been tested on Ubuntu 20.04 and works fine. It is likely that your server lacks PPP kernel support. Try `modprobe ppp_generic` from your Docker host. Then re-create the Docker container. If that does not work and `/dev/ppp` does not exist on your Docker host, then it is likely an issue with your host server's Linux kernel.

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starred/docker-ipsec-vpn-server#170

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