Hi there I just had an odd issue with my Ubutnu-14.04 laptop that I think implies a bug. I had successfully openvpn-ed (version 2.3.2) into work last night, and this morning saw that I'd lost my connection. I run openvpn as a service and it was in a loop: it was connecting for about "--ping-restart" seconds, then generated a couple of LZO errors and restarted - repeating the same pattern. The server was reporting "mtu-dynamic" and "link-mtu" warnings about the repeated connections (even though I do not set mtu in either the server or the client config)
I was a bit confused as it was rock-solid last night. So I simply killed the openvpn client and restarted it and all the problems went away. ie there have been no changes made on either the client or the server, it wasn't working - and yet a full restart of the client software fixed it. Once fully restarted, the LZO client errors and the mtu server warnings disappeared This implies some bug condition is flowing over between the session attempts doesn't it? Or does it imply my mtu changed somehow and that's sticky until a restart? (but apparently they're only off by 4 bytes, why does that matter?) *** client syslogs *** Apr 27 05:06:42 jhaar-nz-ll openvpn[21899]: SENT CONTROL [internet.srv.host]: 'PUSH_REQUEST' (status=1) Apr 27 05:06:47 jhaar-nz-ll openvpn[21899]: SENT CONTROL [internet.srv.host]: 'PUSH_REQUEST' (status=1) Apr 27 05:06:47 jhaar-nz-ll openvpn[21899]: Bad LZO decompression header byte: 0 Apr 27 05:06:52 jhaar-nz-ll openvpn[21899]: Bad LZO decompression header byte: 0 Apr 27 05:06:52 jhaar-nz-ll openvpn[21899]: SENT CONTROL [internet.srv.host]: 'PUSH_REQUEST' (status=1) Apr 27 05:06:52 jhaar-nz-ll openvpn[21899]: NOTE: --mute triggered... Apr 27 05:06:52 jhaar-nz-ll openvpn[21899]: 6 variation(s) on previous 2 message(s) suppressed by --mute Apr 27 05:06:52 jhaar-nz-ll openvpn[21899]: TUN/TAP device vpn1 opened Apr 27 05:06:52 jhaar-nz-ll openvpn[21899]: TUN/TAP TX queue length set to 100 Apr 27 05:06:52 jhaar-nz-ll openvpn[21899]: do_ifconfig, tt->ipv6=0, tt->did_ifconfig_ipv6_setup=0 Apr 27 05:06:52 jhaar-nz-ll openvpn[21899]: /sbin/ip link set dev vpn1 up mtu 1500 Apr 27 05:06:52 jhaar-nz-ll openvpn[21899]: /sbin/ip addr add dev vpn1 10.99.99.99.22/24 broadcast 10.99.99.99.255 Apr 27 05:06:52 jhaar-nz-ll openvpn[21899]: /sbin/ip route add 10.0.0.0/8 via 10.99.99.99.1 metric 500 Apr 27 05:06:52 jhaar-nz-ll openvpn[21899]: Initialization Sequence Completed Apr 27 05:06:57 jhaar-nz-ll openvpn[21899]: Bad LZO decompression header byte: 0 Apr 27 05:07:02 jhaar-nz-ll openvpn[21899]: Bad LZO decompression header byte: 0 Apr 27 05:07:05 jhaar-nz-ll openvpn[21899]: [internet.srv.host] Inactivity timeout (--ping-restart), restarting Apr 27 05:07:05 jhaar-nz-ll openvpn[21899]: /sbin/ip route del 10.0.0.0/8 metric 500 Apr 27 05:07:05 jhaar-nz-ll openvpn[21899]: Closing TUN/TAP interface Apr 27 05:07:05 jhaar-nz-ll openvpn[21899]: /sbin/ip addr del dev vpn1 10.99.99.99.22/24 *** server syslogs *** WARNING: 'link-mtu' is used inconsistently, local='link-mtu 1546', remote='link-mtu 1542' WARNING: 'mtu-dynamic' is present in local config but missing in remote config, local='mtu-dynamic' -- Cheers Jason Haar Corporate Information Security Manager, Trimble Navigation Ltd. Phone: +1 408 481 8171 PGP Fingerprint: 7A2E 0407 C9A6 CAF6 2B9F 8422 C063 5EBB FE1D 66D1 ------------------------------------------------------------------------------ One dashboard for servers and applications across Physical-Virtual-Cloud Widest out-of-the-box monitoring support with 50+ applications Performance metrics, stats and reports that give you Actionable Insights Deep dive visibility with transaction tracing using APM Insight. http://ad.doubleclick.net/ddm/clk/290420510;117567292;y _______________________________________________ Openvpn-users mailing list Openvpn-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/openvpn-users
