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20.1 Legacy Series / Dual WAN - WAN2 should really be used only in case WAN1 is dead (WAN2 metered)
« on: April 18, 2020, 10:05:24 pm »
Hello everybody
I am a feeder for LiveATC.net and would like to achieve high availability of my stream. Therefore I have attached a cheap TPLink 4G router (WAN2) to the OPNsense next to my main cable modem (WAN1) with a flat rate. The SIM for WAN2 is coupled with a prepaid subscription, where the data volume does not expire but costs per MB used.
Now I have configured OPNsense for dual WAN as described in the Doc (https://docs.opnsense.org/manual/how-tos/multiwan.html). That means especially with the fixed assignment of one DNS server each for WAN and for WAN2.
The setup works. But due to the monitoring ping and possibly DNS resolutions on WAN2, there is permanently a minimal load. Not much - but enough so that the prepaid subscription is used down to zero every three months.
Is there any way I can ensure that WAN2 is not at all used during normal operation (when WAN1 normally available)? Only in case of WAN1 failure, the traffic should go over WAN2 without WAN2 being permanently used for pings and DNS queries.
Thanks & best regards
Thomas
I am a feeder for LiveATC.net and would like to achieve high availability of my stream. Therefore I have attached a cheap TPLink 4G router (WAN2) to the OPNsense next to my main cable modem (WAN1) with a flat rate. The SIM for WAN2 is coupled with a prepaid subscription, where the data volume does not expire but costs per MB used.
Now I have configured OPNsense for dual WAN as described in the Doc (https://docs.opnsense.org/manual/how-tos/multiwan.html). That means especially with the fixed assignment of one DNS server each for WAN and for WAN2.
The setup works. But due to the monitoring ping and possibly DNS resolutions on WAN2, there is permanently a minimal load. Not much - but enough so that the prepaid subscription is used down to zero every three months.
Is there any way I can ensure that WAN2 is not at all used during normal operation (when WAN1 normally available)? Only in case of WAN1 failure, the traffic should go over WAN2 without WAN2 being permanently used for pings and DNS queries.
Thanks & best regards
Thomas