Package: openvpn Version: 2.4.0-4
This issue has also been reported as a openVPN @ openVPN: https://community.openvpn.net/openvpn/ticket/861 When I connect to a 2.3.12 FreeBSD via 2.4.* Linux Client with this configuration: client dev tun tun-ipv6 # In DebianStretch this option was disabled. Because of Note: option tun-ipv6 is ignored because modern operating systems do not need special IPv6 tun handling anymore nobind inactive 86400 comp-lzo no <connection> remote server port udp </connection> cipher AES-256-CBC auth sha256 pkcs12 /<path>/file.p12 verify-x509-name server name user nobody persist-key persist-tun I see this warning if I connect to a IPv4 host: Thu Mar 23 13:35:38 2017 UID set to nobody Thu Mar 23 13:35:38 2017 Initialization Sequence Completed Thu Mar 23 13:35:50 2017 Bad compression stub decompression header byte: 102 Thu Mar 23 13:35:50 2017 Bad compression stub decompression header byte: 102 Thu Mar 23 13:35:50 2017 Bad compression stub decompression header byte: 102 Thu Mar 23 13:35:51 2017 Bad compression stub decompression header byte: 102 Thu Mar 23 13:35:51 2017 Bad compression stub decompression header byte: 102 Thu Mar 23 13:35:53 2017 Bad compression stub decompression header byte: 102 Thu Mar 23 13:35:56 2017 Bad compression stub decompression header byte: 102 Thu Mar 23 13:36:48 2017 Bad compression stub decompression header byte: 102 Thu Mar 23 13:36:48 2017 Bad compression stub decompression header byte: 102 Thu Mar 23 13:36:48 2017 Bad compression stub decompression header byte: 102 Thu Mar 23 13:36:49 2017 Bad compression stub decompression header byte: 102 Thu Mar 23 13:36:49 2017 Bad compression stub decompression header byte: 102 Thu Mar 23 13:36:51 2017 Bad compression stub decompression header byte: 102 Thu Mar 23 13:37:27 2017 Bad compression stub decompression header byte: 102 Thu Mar 23 13:37:27 2017 Bad compression stub decompression header byte: 102 Thu Mar 23 13:37:28 2017 Bad compression stub decompression header byte: 102 Thu Mar 23 13:37:28 2017 Bad compression stub decompression header byte: 102 Thu Mar 23 13:37:29 2017 Bad compression stub decompression header byte: 102 Thu Mar 23 13:37:30 2017 Bad compression stub decompression header byte: 102 If I connect via IPv6 I don't have any issue. If I change option comp-lzo For: comp-lzo no To: comp-lzo yes Everything is fine too, even tough the server has been configured, with: comp-lzo no This has been tested on openvpn 2.4.0 as well as openvpn 2.4.1 Have tested in on openSUSE toop version 2.4.0 and 2.4.1 with the same issue. There for it looks like a openVPN issue.
