My setup seems ok?

Installing and Using OpenWrt Network and Wireless Configuration
1

Hi,

my firewall seems ok vs my network setup?

thanks


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

config globals 'globals'
	option packet_steering '1'

config device
	option name 'br-lan'
	option type 'bridge'
	list ports 'lan1'
	list ports 'lan2'
	list ports 'lan3'
	list ports 'lan4'
	list ports 'lan5'

config interface 'lan'
	option device 'br-lan'
	option proto 'static'
	option ipaddr '192.168.1.1'
	option netmask '255.255.255.0'
	option ip6assign '60'

config interface 'wan'
	option device 'eth1'
	option proto 'dhcp'
	option peerdns '0'
	list dns '9.9.9.9'
	list dns '1.1.1.1'

config interface 'wg0'
	option proto 'wireguard'
	option private_key 'xxxxxxxxxxxxxxxxxxxxxxxxx'
	list addresses 'x.x.x.x'
	option mtu '1390'

config wireguard_wg0
	option description 'mtl'
	option public_key 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx'
	list allowed_ips '0.0.0.0/0'
	option route_allowed_ips '1'
	option endpoint_host 'xx.xx.xx'
	option persistent_keepalive '25'
	option endpoint_port '51820'

root@nnnn:~# cat /etc/config/firewall

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

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

config zone
	option name 'wan'
	option input 'REJECT'
	option output 'ACCEPT'
	option forward 'REJECT'
	option masq '1'
	option mtu_fix '1'
	list network 'wan'
	list network 'wan6'
	list network 'wg0'

config forwarding
	option src 'lan'
	option dest 'wan'

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 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 redirect 'dns_int'
	option name 'Intercept-DNS'
	option family 'any'
	option proto 'tcp udp'
	option src 'lan'
	option src_dport '53'
	option target 'DNAT'

config include 'pbr'
	option fw4_compatible '1'
	option type 'script'
	option path '/usr/share/pbr/firewall.include'
2

Depends on your goals... but looks fine. Does it work the way you want?

1 Like
3

yes, I was not sure about firewall, but if you do not see any problem, it is fine.

thanks

4

You have PBR for wg and DNS interception enabled - rest is completely default (and you did not introduce extra "exposure")

If you want to spend some time being admin-creative

  • DROP ipo REJECT wan zone input and forward
  • split wg to different firewall zone from wan
1 Like
5

Could you elaborate?

Or do you have some links to read on it?

Thanks

6

Read my post, this is not wikipedia where one posts 50 sources per word

7

Why?

Maybe you can clarify why you're concerned about 1 firewall rule. Your device looks like mainly a default configuration. Is there information you haven't discussed?

1 Like
8

Change on the wan zone the action from drop to reject...

And create an additional zone for wg to apply more or less strict rules then for lan....
I have to agree with @brada4 here there is no complicated instructions here.

If you need more information then grab a book about basic networking and zone based firewalls...

1 Like
9

Indeed intended as a learning excersise on top of current already good setup.

1 Like