How to prevent restarting OpenVPN tunnels/ifaces if gateway monitor goes down
-
I'm already using traffic shaper with scheduler type PRIQ for each interface.
To avoid that WAN_2 connection goes down frequently I changed bandwith to 4Mbits, before it was set to 6Mbits.
Normally this connection should have 200Mbit/s down and 12Mbit's up, but it seems it's only stable when limiting the upstream to 4Mbit/s.
With this change, it currently seems the connection is stable as well there is a high utilization.Maybe, you can help me concerning my initial question why both OpenVPN and IPSec tunnels will be restarted if WAN_2 connection will be omitted and added back again to routing group Multi_WAN_Failover_P1 as showing below:
Jul 13 14:48:53 php-fpm 21033 /rc.dyndns.update: MONITOR: WAN_2 is down, omitting from routing group Multi_WAN_Failover_P1 8.8.4.4|x.x.x.x|WAN_2|0ms|0ms|100%|down
Jul 13 14:48:54 php-fpm 21033 /rc.dyndns.update: Message sent to xxx@xxx OK
Jul 13 14:48:54 php-fpm 35935 /rc.openvpn: OpenVPN: One or more OpenVPN tunnel endpoints may have changed its IP. Reloading endpoints that may use WAN_2.
Jul 13 14:48:54 check_reload_status updating dyndns WAN_2
Jul 13 14:48:54 check_reload_status Restarting ipsec tunnels
Jul 13 14:48:54 check_reload_status Restarting OpenVPN tunnels/interfaces
Jul 13 14:48:54 check_reload_status Reloading filter
Jul 13 14:48:56 php-fpm 35935 /rc.openvpn: OpenVPN: One or more OpenVPN tunnel endpoints may have changed its IP. Reloading endpoints that may use WAN_2.
Jul 13 14:48:57 php-fpm 35935 /rc.filter_configure_sync: MONITOR: WAN_2 is available now, adding to routing group Multi_WAN_Failover_P1 8.8.4.4|x.x.x.x|WAN_2|114.333ms|205.948ms|0.0%|none
Jul 13 14:48:57 php-fpm 35935 /rc.filter_configure_sync: Message sent to xxx@xxx OK
Jul 13 14:49:03 check_reload_status updating dyndns WAN_2
Jul 13 14:49:03 check_reload_status Restarting ipsec tunnels
Jul 13 14:49:03 check_reload_status Restarting OpenVPN tunnels/interfaces
Jul 13 14:49:03 check_reload_status Reloading filterIn my understanding, this may be by design, because OpenVPN server is running on WAN_1 carp and the appropriate interface is a member of routing group Multi_WAN_Failover_P1.
Please correct me if I'm wrong. -
If you bind the OpenVPN server to localhost instead and port forward CARP:1194 to 127.0.0.1:1194 it might help.
I do not think there is much selectivity in what services are restarted when a gateway goes down. Multi-WAN gateway events are kind of expensive.
-
If you bind the OpenVPN server to localhost instead and port forward CARP:1194 to 127.0.0.1:1194 it might help.
I use this configuration (binding OpenVPN servers to localhost) daily. It works.
-
If you bind the OpenVPN server to localhost instead and port forward CARP:1194 to 127.0.0.1:1194 it might help.
I use this configuration (binding OpenVPN servers to localhost) daily. It works.
Are you using this configuration because of the same issue (Tunnel restart when the appropriate interface will be omitted and added back again to multi wan group as in my case)?
If not, do you have any other pros/cons for this config?
-
I use that configuration in HA clusters so OpenVPN server does not stop/start based on who is the master.
The servers just stay running on both and whichever one is master receives the traffic.
-
If you bind the OpenVPN server to localhost instead and port forward CARP:1194 to 127.0.0.1:1194 it might help.
I use this configuration (binding OpenVPN servers to localhost) daily. It works.
Are you using this configuration because of the same issue (Tunnel restart when the appropriate interface will be omitted and added back again to multi wan group as in my case)?
If not, do you have any other pros/cons for this config?
Somewhat.
It is easier to toss around endpoint in case of multiple IPs/multihomed setups (and for RR/FO multihomed endpoint this is a must).
It is easier to control outbound connections (for 'client' VPN) using floating rules.
…
and I use it like that for so long I don't even remember all nuances.
But less daemon restarts is one of them. -
Thank you guys.
I'm now using the OpenVPN server bound to localhost with appropriate port forwarding from carp to localhost.
That's working perfectly. -
Hello !
I use the same kind of solution for OpenVPN servers (binding the OpenVPN server to localhost when using CARP).
But I still have the problem for the OpenVPN site to site clients. Indeed these clients are bound to a Gateway group and when the backup gateway (which doesn't route any traffic when active gateway is UP) goes down, the OpenVPN clients restart and for example SSH connexions through VPN get broken.
Did someone find a good solution for this ?
Regards,
-
No. Those states are going to break. They will need to reconnect.
-
OK that's crystal clear, thanks !
-
Actually, it looks like SSH don't break anymore when unsetting ""State Killing on Gateway Failure / Flush all states when a gateway goes down".
But I have to check if there are negative side effects, since this option was set in order to improve WAN failover with different OpenVPN clients bound to different gateway groups.
-
If it doesn't it is because it actually reconnects.
I have never seen ssh do that.
