Site 2 Site Wireguard AllowedIPs question.
IPv4 both sites are private address ranges with no overlap, so to do split tunnel I just configure the client AllowedIPs to match the server's untunneled LAN range. Easy enough.
However for IPv6 everything has GUA addresses thanks to prefix delegation. Thing is, the ISP won't guarantee my prefix. So how do I guard against prefix changes... Or do I just have to update the client config then?