I’m setting up a TL-MR6400 router with a SIM card as a failover on PFSense, with a “pay what you use” 4G SIMcard in it.
Here is the question :
When setting up a PPPOE WAN in PFSense you can select “dail on demand”, so it only establishes this WAN connection when it’s actually needed (when it actually fails over essentially).
The problem is, that the TL-MR6400 is not PPPOE, it can only be set to “bridged” (because we don’t want double NAT, of course), so it transparently offers the WAN IP of the cable ISP as a DHCP IP to the PFSense port …
… and this type of WAN (DHCP) doesn’t seem to have this “dail on demand” function, or somethins similar.
Is there a way to do this ?
maybe with a firewall rule, or some other option ?
The reason is : when the main WAN is up (= no failover), it doesn’t need to make any connection to the failover WAN, because it’s just wasting data (and money because it’s “pay what you use”) for nothing (just for checking “are you still there, are you ok ?”, which it does constantly, as I can see in the traffic graphs …
It should only establish the second (failover) WAN connection when it’s actually needed (on actual failover).
Is there a way to basically shut it up, unless it’s actually needed for failover ?