Quetion about my wireguard setup

Installing and Using OpenWrt Network and Wireless Configuration
1

hey there,

I followed this guide to setup a wireguard client on mine TP-Link TL-WDR3600

I would like an opinion from you on the firewall section and if this configuration may act like a killswitch
on the wg tunnel.
I did some tests and I think so.
Is it better if I assign the lan firewall zone to the wg interface?
Ty

fw conf

config defaults
option input 'ACCEPT'
option output 'ACCEPT'
option forward 'REJECT'
option synflood_protect '1'

config zone
option name 'lan'
list network 'lan'
option input 'ACCEPT'
option output 'ACCEPT'
option forward 'ACCEPT'

config zone
option name 'wan'
option input 'REJECT'
option output 'ACCEPT'
option forward 'REJECT'
option masq '1'
option mtu_fix '1'
option network 'wan wan6'

config rule
option name 'Allow-DHCP-Renew'
option src 'wan'
option proto 'udp'
option dest_port '68'
option target 'ACCEPT'
option family 'ipv4'

config rule
option name 'Allow-Ping'
option src 'wan'
option proto 'icmp'
option icmp_type 'echo-request'
option family 'ipv4'
option target 'ACCEPT'

config rule
option name 'Allow-IGMP'
option src 'wan'
option proto 'igmp'
option family 'ipv4'
option target 'ACCEPT'

config rule
option name 'Allow-DHCPv6'
option src 'wan'
option proto 'udp'
option src_ip 'fc00::/6'
option dest_ip 'fc00::/6'
option dest_port '546'
option family 'ipv6'
option target 'ACCEPT'

config rule
option name 'Allow-MLD'
option src 'wan'
option proto 'icmp'
option src_ip 'fe80::/10'
list icmp_type '130/0'
list icmp_type '131/0'
list icmp_type '132/0'
list icmp_type '143/0'
option family 'ipv6'
option target 'ACCEPT'

config rule
option name 'Allow-ICMPv6-Input'
option src 'wan'
option proto 'icmp'
list icmp_type 'echo-request'
list icmp_type 'echo-reply'
list icmp_type 'destination-unreachable'
list icmp_type 'packet-too-big'
list icmp_type 'time-exceeded'
list icmp_type 'bad-header'
list icmp_type 'unknown-header-type'
list icmp_type 'router-solicitation'
list icmp_type 'neighbour-solicitation'
list icmp_type 'router-advertisement'
list icmp_type 'neighbour-advertisement'
option limit '1000/sec'
option family 'ipv6'
option target 'ACCEPT'

config rule
option name 'Allow-ICMPv6-Forward'
option src 'wan'
option dest '*'
option proto 'icmp'
list icmp_type 'echo-request'
list icmp_type 'echo-reply'
list icmp_type 'destination-unreachable'
list icmp_type 'packet-too-big'
list icmp_type 'time-exceeded'
list icmp_type 'bad-header'
list icmp_type 'unknown-header-type'
option limit '1000/sec'
option family 'ipv6'
option target 'ACCEPT'

config rule
option name 'Allow-IPSec-ESP'
option src 'wan'
option dest 'lan'
option proto 'esp'
option target 'ACCEPT'

config rule
option name 'Allow-ISAKMP'
option src 'wan'
option dest 'lan'
option dest_port '500'
option proto 'udp'
option target 'ACCEPT'

config include
option path '/etc/firewall.user'

config zone
option network 'wg'
option name 'wgzone'
option mtu_fix '1'
option input 'REJECT'
option forward 'REJECT'
option masq '1'
option output 'ACCEPT'

config forwarding
option dest 'wgzone'
option src 'lan'

net conf

config interface 'loopback'
option ifname 'lo'
option proto 'static'
option ipaddr '127.0.0.1'
option netmask '255.0.0.0'

config globals 'globals'
option ula_prefix 'xxx::/48'

config interface 'lan'
option type 'bridge'
option ifname 'eth0.1'
option proto 'static'
option netmask '255.255.255.0'
option ip6assign '60'
option ipaddr '192.168.1.12'

config interface 'wan'
option ifname 'eth0.2'
option proto 'static'
option netmask '255.255.255.0'
option ipaddr '192.168.1.254'
option gateway '192.168.1.1'
list dns '1.1.1.1'
list dns '8.8.8.8'

config device 'wan_eth0_2_dev'
option name 'eth0.2'
option macaddr 'xxx'

config interface 'wan6'
option ifname 'eth0.2'
option proto 'dhcpv6'

config switch
option name 'switch0'
option reset '1'
option enable_vlan '1'

config switch_vlan
option device 'switch0'
option vlan '1'
option ports '2 3 4 5 0t'

config switch_vlan
option device 'switch0'
option vlan '2'
option ports '1 0t'

config interface 'wg'
option proto 'wireguard'
list addresses '10.66.66.10/24'
option private_key 'xxx'

config wireguard_wg
option persistent_keepalive '25'
option public_key 'xxx'
option description 'ovhuk10'
option endpoint_port 'xxx'
option endpoint_host 'xxx'
list allowed_ips '0.0.0.0/0'
list allowed_ips '::/0'
option preshared_key 'xxx'
option route_allowed_ips '1'

2

I suggest you change your private keys as they were visible in your original post that you deleted. Even so it was a short time they might still be compromised.

3

good point

4

Yes, it can.