if you have a router with two interfaces LAN and WAN (cloud)
Can i create an subinterface on the WAN interface then assign a GRE tunnel to my subinterface (the tunnel goes to another site let's say siteB)
then based on my traffic's destination, I tell my router to:
Either send the info through the tunnel (if that traffic is destined for SiteB which is the far end of my site-to-site tunnel
or
if the traffic not meant for siteB but meant for other WAN destinations which are reachable from the WAN interface then don't use the tunnel but send traffic outside
the purpose of the tunnel is to secure my traffic from & to SiteB
will this work ???
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