Toto nastavení mi nepomohlo:
peer A:
allowed ips: 192.168.10.0/24, fd00:db80:0:10::/64, 192.168.222.10/32, fd00:db80:0:222::10/128, 192.168.222.1/32, fd00:db80:0:222::1/128, 192.168.222.20/32, fd00:db80:0:222::20/128, 192.168.20.0/24, fd00:db80:0:20::/64
peer B:
allowed ips: 192.168.20.0/24, fd00:db80:0:20::/64, 192.168.222.20/32, fd00:db80:0:222::20/128, 192.168.222.1/32, fd00:db80:0:222::1/128, 192.168.222.10/32, fd00:db80:0:222::10/128, 192.168.10.0/24, fd00:db80:0:10::/64
a na serveru ve středu:
peer A:
allowed ips: 192.168.222.10/32, fd00:db80:0:222::10/128, 192.168.10.0/24, fd00:db80:0:10::/64
peer B:
allowed ips: 192.168.222.20/32, fd00:db80:0:222::20/128, 192.168.20.0/24, fd00:db80:0:20::/64