@Richard_Velox wrote: We're a small WISP that's been allocated a small sliver of IPv4 addresses and we're a little stingy about needlessly allocating them; Also the scheme is incredibly flexible. Most vendor's routers work with this allocation scheme like Sonicwall, Unifi, Cisco-Linksys, AirCube, some Edgerouter, Watchguard, some? Asus, Fortigate) and others need 1:1 NAT like PFSENSE, Meraki, Luxul. Routing between towers is accomplished using OSPF. An event triggered script can add the route or it can be added to the configuration. Gateways have IPs in the 100.64.0.0/10 range. Have you tried the "asking ARIN for an IPv6 allocation and a wee bit of IPv4 to help with your transition" trick? 😉 Assuming ARIN is your people! @MerakiDave and his friends might be able to give us a conclusive answer. But I suspect that if it hasn't worked before, you're going to have to stick with providing NAT to your customers. How's using that space been working for your customers? Have you got yourself setup so they can use VPNs, or nah? I'm eternally curious about WISPs!
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