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setup wireguard @ ddwrt

  • install latest ddwrt firmware, BS build is recommended
  • setup wireguard endpoint by following QuickStart@WireGuard
  • add peer config in ddwrt SETUP/TUNNEL
  • add a VAP (wl1.1 192.168.18.1) in Wireless_Basic.asp VAP
  • save startup rules to forward traffice from wl1.1 to wireguard oet1 (Administration/Command)
ip rule add from 192.168.18.0/24 lookup 100
ip route add table 100 default via 192.168.2.1 dev oet1
iptables -t nat -A POSTROUTING -s 192.168.18.0/24 -o oet1 -j MASQUERADE

  • Services -> Services and ensure that DNSMasq is enabled, in Dnsmasq section, Enter the following Additional DNSMasq Options: dhcp-option=wl1.1,6,8.8.8.8,1.1.1.1 DNSMASQ

  • Setup -> Networking, in DHCPD section add 'Multiple DHCP Server' for VAP interface

Now after your mobile phone connect to VAP, all traffic should forward to wireguard oet1

NOTICE:

  • MUST disable AP Isolation for Google home setup
  • If something wrong, try to disable SFE(Shortcut Forwarding Engine) @ basic setup.