Guest Wifi connected but no internet access

Installing and Using OpenWrt Network and Wireless Configuration
22

It is a crappy TPLink Archer C6, i flashed OpenWRT on it because the original firmware was very insecure with Guest network enabled.

ubus call system board

root@OpenWrt:~# ubus call system board
{
        "kernel": "4.14.195",
        "hostname": "OpenWrt",
        "system": "Qualcomm Atheros QCA956X ver 1 rev 0",
        "model": "TP-Link Archer C6 v2",
        "board_name": "tplink,archer-c6-v2",
        "release": {
                "distribution": "OpenWrt",
                "version": "19.07.4",
                "revision": "r11208-ce6496d796",
                "target": "ath79/generic",
                "description": "OpenWrt 19.07.4 r11208-ce6496d796"
        }
}
23

I am not sure if there is point to troubleshoot, or it will be faster to reset to defaults and do the dumb-guest-ap guide from the beginning. It should be working now, I don't understand what is the issue and packets are not masqueraded on the way out to the lan.

24

i'm making a backup now.
tomorrow i will reset it to default and try again the configuration.

Thank you guys !!

2 Likes
25

Just finished.

Router reset to default settings.

I have set dumbAp following this guide.
Deleted Wan and wan6 interfaces(i don't need them)

I have set guest wifi following this guide.

Nothing to do, same error as yestarday. Guest clients connected, but no internet.

It's very strange.

26

The changes below assume an OpenWrt default configuration. We assume that you have a private WLAN set on 192.168.1.xxx and want a guest WLAN on 192.168.2.xxx.

You should start clean following the second guide only.
In case that doesn't work post the following:

uci export network; uci export wireless; \
uci export dhcp; uci export firewall; \
head -n -0 /etc/firewall.user; \
iptables-save -c; ip -4 addr ; ip -4 ro li tab all ; ip -4 ru; \
ls -l  /etc/resolv.* /tmp/resolv.* /tmp/resolv.*/* ; head -n -0 /etc/resolv.* /tmp/resolv.* /tmp/resolv.*/*
27

Ok in the coming days i will try and post the results here.

29

I did a reset.
The router is connected LAN to LAN.
Login back to Luci, enabled wireless, changed LAN address to 192.168.123.5 because my gateway is 192.168.123.1

Did the Guest Wifi configuration again but the problem reamin: connected, no internet.

NETWORK

root@OpenWrt:~# uci export network
package network

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 'fdc1:0abb:2611::/48'

config interface 'lan'
        option type 'bridge'
        option ifname 'eth0.1'
        option proto 'static'
        option netmask '255.255.255.0'
        option ip6assign '60'
        option gateway '192.168.123.1'
        option ipaddr '192.168.123.5'

config interface 'wan'
        option ifname 'eth0.2'
        option proto 'dhcp'

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 'guest'
        option proto 'static'
        option ipaddr '192.168.80.1'
        option netmask '255.255.255.0'

WIRELESS

root@OpenWrt:~# uci export wireless
package wireless

config wifi-device 'radio0'
        option type 'mac80211'
        option channel '36'
        option hwmode '11a'
        option path 'pci0000:00/0000:00:00.0'
        option htmode 'VHT80'

config wifi-iface 'default_radio0'
        option device 'radio0'
        option network 'lan'
        option mode 'ap'
        option key ''
        option ssid 'OpenWrt'
        option encryption 'none'

config wifi-device 'radio1'
        option type 'mac80211'
        option channel '11'
        option hwmode '11g'
        option path 'platform/ahb/18100000.wmac'
        option htmode 'HT20'

config wifi-iface 'default_radio1'
        option device 'radio1'
        option network 'lan'
        option mode 'ap'
        option key ''
        option ssid 'OpenWrt'
        option encryption 'none'

config wifi-iface 'wifinet2'
        option ssid 'OpenWrt GUEST'
        option encryption 'none'
        option device 'radio1'
        option mode 'ap'
        option network 'guest'

DHCP

root@OpenWrt:~# uci export dhcp
package dhcp

config dnsmasq
        option domainneeded '1'
        option boguspriv '1'
        option filterwin2k '0'
        option localise_queries '1'
        option rebind_protection '1'
        option rebind_localhost '1'
        option local '/lan/'
        option domain 'lan'
        option expandhosts '1'
        option nonegcache '0'
        option authoritative '1'
        option readethers '1'
        option leasefile '/tmp/dhcp.leases'
        option resolvfile '/tmp/resolv.conf.auto'
        option nonwildcard '1'
        option localservice '1'

config dhcp 'lan'
        option interface 'lan'
        option dhcpv6 'server'
        option ra 'server'
        option ra_management '1'
        option ignore '1'

config dhcp 'wan'
        option interface 'wan'
        option ignore '1'

config odhcpd 'odhcpd'
        option maindhcp '0'
        option leasefile '/tmp/hosts/odhcpd'
        option leasetrigger '/usr/sbin/odhcpd-update'
        option loglevel '4'

config dhcp 'guest'
        option start '100'
        option leasetime '12h'
        option interface 'guest'
        option limit '200'

FIREWALL

root@OpenWrt:~# uci export firewall
package firewall

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'
        list network 'wan'
        list network 'wan6'
        option input 'REJECT'
        option output 'ACCEPT'
        option forward 'REJECT'
        option masq '1'
        option mtu_fix '1'

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 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 'guest'
        option forward 'REJECT'
        option name 'guest'
        option output 'ACCEPT'
        option input 'REJECT'
        option masq '1'

config forwarding
        option dest 'lan'
        option src 'guest'

config rule
        option dest_port '67-68'
        option src 'guest'
        option name 'Guest DHCP'
        option target 'ACCEPT'
        list proto 'udp'

config rule
        option dest_port '53'
        option src 'guest'
        option name 'Guest DNS'
        option target 'ACCEPT'

config rule
        option src 'guest'
        option name 'Block Guest to LAN'
        option dest 'lan'
        list dest_ip '192.168.123.0/24'
        option target 'DROP'
        list proto 'all'

head -n -0 /etc/firewall.user

root@OpenWrt:~# head -n -0 /etc/firewall.user
# This file is interpreted as shell script.
# Put your custom iptables rules here, they will
# be executed with each firewall (re-)start.

# Internal uci firewall chains are flushed and recreated on reload, so
# put custom rules into the root chains e.g. INPUT or FORWARD or into the
# special user chains, e.g. input_wan_rule or postrouting_lan_rule.

iptables-save -c

root@OpenWrt:~# iptables-save -c
# Generated by iptables-save v1.8.3 on Sun Sep  6 16:51:09 2020
*nat
:PREROUTING ACCEPT [167:21813]
:INPUT ACCEPT [59:6786]
:OUTPUT ACCEPT [34:2687]
:POSTROUTING ACCEPT [45:3347]
:postrouting_guest_rule - [0:0]
:postrouting_lan_rule - [0:0]
:postrouting_rule - [0:0]
:postrouting_wan_rule - [0:0]
:prerouting_guest_rule - [0:0]
:prerouting_lan_rule - [0:0]
:prerouting_rule - [0:0]
:prerouting_wan_rule - [0:0]
:zone_guest_postrouting - [0:0]
:zone_guest_prerouting - [0:0]
:zone_lan_postrouting - [0:0]
:zone_lan_prerouting - [0:0]
:zone_wan_postrouting - [0:0]
:zone_wan_prerouting - [0:0]
[167:21813] -A PREROUTING -m comment --comment "!fw3: Custom prerouting rule chain" -j prerouting_rule
[167:21813] -A PREROUTING -i br-lan -m comment --comment "!fw3" -j zone_lan_prerouting
[0:0] -A PREROUTING -i eth0.2 -m comment --comment "!fw3" -j zone_wan_prerouting
[0:0] -A PREROUTING -i wlan1-1 -m comment --comment "!fw3" -j zone_guest_prerouting
[45:3347] -A POSTROUTING -m comment --comment "!fw3: Custom postrouting rule chain" -j postrouting_rule
[11:660] -A POSTROUTING -o br-lan -m comment --comment "!fw3" -j zone_lan_postrouting
[0:0] -A POSTROUTING -o eth0.2 -m comment --comment "!fw3" -j zone_wan_postrouting
[0:0] -A POSTROUTING -o wlan1-1 -m comment --comment "!fw3" -j zone_guest_postrouting
[0:0] -A zone_guest_postrouting -m comment --comment "!fw3: Custom guest postrouting rule chain" -j postrouting_guest_rule
[0:0] -A zone_guest_postrouting -m comment --comment "!fw3" -j MASQUERADE
[0:0] -A zone_guest_prerouting -m comment --comment "!fw3: Custom guest prerouting rule chain" -j prerouting_guest_rule
[11:660] -A zone_lan_postrouting -m comment --comment "!fw3: Custom lan postrouting rule chain" -j postrouting_lan_rule
[167:21813] -A zone_lan_prerouting -m comment --comment "!fw3: Custom lan prerouting rule chain" -j prerouting_lan_rule
[0:0] -A zone_wan_postrouting -m comment --comment "!fw3: Custom wan postrouting rule chain" -j postrouting_wan_rule
[0:0] -A zone_wan_postrouting -m comment --comment "!fw3" -j MASQUERADE
[0:0] -A zone_wan_prerouting -m comment --comment "!fw3: Custom wan prerouting rule chain" -j prerouting_wan_rule
COMMIT
# Completed on Sun Sep  6 16:51:09 2020
# Generated by iptables-save v1.8.3 on Sun Sep  6 16:51:09 2020
*mangle
:PREROUTING ACCEPT [1275:153341]
:INPUT ACCEPT [1134:136334]
:FORWARD ACCEPT [44:2640]
:OUTPUT ACCEPT [1070:388317]
:POSTROUTING ACCEPT [1108:390429]
[0:0] -A FORWARD -o eth0.2 -p tcp -m tcp --tcp-flags SYN,RST SYN -m comment --comment "!fw3: Zone wan MTU fixing" -j TCPMSS --clamp-mss-to-pmtu
[0:0] -A FORWARD -i eth0.2 -p tcp -m tcp --tcp-flags SYN,RST SYN -m comment --comment "!fw3: Zone wan MTU fixing" -j TCPMSS --clamp-mss-to-pmtu
COMMIT
# Completed on Sun Sep  6 16:51:09 2020
# Generated by iptables-save v1.8.3 on Sun Sep  6 16:51:09 2020
*filter
:INPUT ACCEPT [0:0]
:FORWARD DROP [0:0]
:OUTPUT ACCEPT [0:0]
:forwarding_guest_rule - [0:0]
:forwarding_lan_rule - [0:0]
:forwarding_rule - [0:0]
:forwarding_wan_rule - [0:0]
:input_guest_rule - [0:0]
:input_lan_rule - [0:0]
:input_rule - [0:0]
:input_wan_rule - [0:0]
:output_guest_rule - [0:0]
:output_lan_rule - [0:0]
:output_rule - [0:0]
:output_wan_rule - [0:0]
:reject - [0:0]
:syn_flood - [0:0]
:zone_guest_dest_ACCEPT - [0:0]
:zone_guest_dest_REJECT - [0:0]
:zone_guest_forward - [0:0]
:zone_guest_input - [0:0]
:zone_guest_output - [0:0]
:zone_guest_src_REJECT - [0:0]
:zone_lan_dest_ACCEPT - [0:0]
:zone_lan_dest_DROP - [0:0]
:zone_lan_forward - [0:0]
:zone_lan_input - [0:0]
:zone_lan_output - [0:0]
:zone_lan_src_ACCEPT - [0:0]
:zone_wan_dest_ACCEPT - [0:0]
:zone_wan_dest_REJECT - [0:0]
:zone_wan_forward - [0:0]
:zone_wan_input - [0:0]
:zone_wan_output - [0:0]
:zone_wan_src_REJECT - [0:0]
[294:22446] -A INPUT -i lo -m comment --comment "!fw3" -j ACCEPT
[842:113968] -A INPUT -m comment --comment "!fw3: Custom input rule chain" -j input_rule
[534:83666] -A INPUT -m conntrack --ctstate RELATED,ESTABLISHED -m comment --comment "!fw3" -j ACCEPT
[3:156] -A INPUT -p tcp -m tcp --tcp-flags FIN,SYN,RST,ACK SYN -m comment --comment "!fw3" -j syn_flood
[308:30302] -A INPUT -i br-lan -m comment --comment "!fw3" -j zone_lan_input
[0:0] -A INPUT -i eth0.2 -m comment --comment "!fw3" -j zone_wan_input
[0:0] -A INPUT -i wlan1-1 -m comment --comment "!fw3" -j zone_guest_input
[44:2640] -A FORWARD -m comment --comment "!fw3: Custom forwarding rule chain" -j forwarding_rule
[0:0] -A FORWARD -m conntrack --ctstate RELATED,ESTABLISHED -m comment --comment "!fw3" -j ACCEPT
[44:2640] -A FORWARD -i br-lan -m comment --comment "!fw3" -j zone_lan_forward
[0:0] -A FORWARD -i eth0.2 -m comment --comment "!fw3" -j zone_wan_forward
[0:0] -A FORWARD -i wlan1-1 -m comment --comment "!fw3" -j zone_guest_forward
[0:0] -A FORWARD -m comment --comment "!fw3" -j reject
[294:22446] -A OUTPUT -o lo -m comment --comment "!fw3" -j ACCEPT
[775:366407] -A OUTPUT -m comment --comment "!fw3: Custom output rule chain" -j output_rule
[775:366407] -A OUTPUT -m conntrack --ctstate RELATED,ESTABLISHED -m comment --comment "!fw3" -j ACCEPT
[0:0] -A OUTPUT -o br-lan -m comment --comment "!fw3" -j zone_lan_output
[0:0] -A OUTPUT -o eth0.2 -m comment --comment "!fw3" -j zone_wan_output
[0:0] -A OUTPUT -o wlan1-1 -m comment --comment "!fw3" -j zone_guest_output
[0:0] -A reject -p tcp -m comment --comment "!fw3" -j REJECT --reject-with tcp-reset
[0:0] -A reject -m comment --comment "!fw3" -j REJECT --reject-with icmp-port-unreachable
[3:156] -A syn_flood -p tcp -m tcp --tcp-flags FIN,SYN,RST,ACK SYN -m limit --limit 25/sec --limit-burst 50 -m comment --comment "!fw3" -j RETURN
[0:0] -A syn_flood -m comment --comment "!fw3" -j DROP
[0:0] -A zone_guest_dest_ACCEPT -o wlan1-1 -m conntrack --ctstate INVALID -m comment --comment "!fw3: Prevent NAT leakage" -j DROP
[0:0] -A zone_guest_dest_ACCEPT -o wlan1-1 -m comment --comment "!fw3" -j ACCEPT
[0:0] -A zone_guest_dest_REJECT -o wlan1-1 -m comment --comment "!fw3" -j reject
[0:0] -A zone_guest_forward -m comment --comment "!fw3: Custom guest forwarding rule chain" -j forwarding_guest_rule
[0:0] -A zone_guest_forward -d 192.168.123.0/24 -m comment --comment "!fw3: Block Guest to LAN" -j zone_lan_dest_DROP
[0:0] -A zone_guest_forward -m comment --comment "!fw3: Zone guest to lan forwarding policy" -j zone_lan_dest_ACCEPT
[0:0] -A zone_guest_forward -m conntrack --ctstate DNAT -m comment --comment "!fw3: Accept port forwards" -j ACCEPT
[0:0] -A zone_guest_forward -m comment --comment "!fw3" -j zone_guest_dest_REJECT
[0:0] -A zone_guest_input -m comment --comment "!fw3: Custom guest input rule chain" -j input_guest_rule
[0:0] -A zone_guest_input -p udp -m udp --dport 67:68 -m comment --comment "!fw3: Guest DHCP" -j ACCEPT
[0:0] -A zone_guest_input -p tcp -m tcp --dport 53 -m comment --comment "!fw3: Guest DNS" -j ACCEPT
[0:0] -A zone_guest_input -p udp -m udp --dport 53 -m comment --comment "!fw3: Guest DNS" -j ACCEPT
[0:0] -A zone_guest_input -m conntrack --ctstate DNAT -m comment --comment "!fw3: Accept port redirections" -j ACCEPT
[0:0] -A zone_guest_input -m comment --comment "!fw3" -j zone_guest_src_REJECT
[0:0] -A zone_guest_output -m comment --comment "!fw3: Custom guest output rule chain" -j output_guest_rule
[0:0] -A zone_guest_output -m comment --comment "!fw3" -j zone_guest_dest_ACCEPT
[0:0] -A zone_guest_src_REJECT -i wlan1-1 -m comment --comment "!fw3" -j reject
[44:2640] -A zone_lan_dest_ACCEPT -o br-lan -m comment --comment "!fw3" -j ACCEPT
[0:0] -A zone_lan_dest_DROP -o br-lan -m comment --comment "!fw3" -j DROP
[44:2640] -A zone_lan_forward -m comment --comment "!fw3: Custom lan forwarding rule chain" -j forwarding_lan_rule
[44:2640] -A zone_lan_forward -m comment --comment "!fw3: Zone lan to wan forwarding policy" -j zone_wan_dest_ACCEPT
[0:0] -A zone_lan_forward -m conntrack --ctstate DNAT -m comment --comment "!fw3: Accept port forwards" -j ACCEPT
[44:2640] -A zone_lan_forward -m comment --comment "!fw3" -j zone_lan_dest_ACCEPT
[308:30302] -A zone_lan_input -m comment --comment "!fw3: Custom lan input rule chain" -j input_lan_rule
[0:0] -A zone_lan_input -m conntrack --ctstate DNAT -m comment --comment "!fw3: Accept port redirections" -j ACCEPT
[308:30302] -A zone_lan_input -m comment --comment "!fw3" -j zone_lan_src_ACCEPT
[0:0] -A zone_lan_output -m comment --comment "!fw3: Custom lan output rule chain" -j output_lan_rule
[0:0] -A zone_lan_output -m comment --comment "!fw3" -j zone_lan_dest_ACCEPT
[308:30302] -A zone_lan_src_ACCEPT -i br-lan -m conntrack --ctstate NEW,UNTRACKED -m comment --comment "!fw3" -j ACCEPT
[0:0] -A zone_wan_dest_ACCEPT -o eth0.2 -m conntrack --ctstate INVALID -m comment --comment "!fw3: Prevent NAT leakage" -j DROP
[0:0] -A zone_wan_dest_ACCEPT -o eth0.2 -m comment --comment "!fw3" -j ACCEPT
[0:0] -A zone_wan_dest_REJECT -o eth0.2 -m comment --comment "!fw3" -j reject
[0:0] -A zone_wan_forward -m comment --comment "!fw3: Custom wan forwarding rule chain" -j forwarding_wan_rule
[0:0] -A zone_wan_forward -p esp -m comment --comment "!fw3: Allow-IPSec-ESP" -j zone_lan_dest_ACCEPT
[0:0] -A zone_wan_forward -p udp -m udp --dport 500 -m comment --comment "!fw3: Allow-ISAKMP" -j zone_lan_dest_ACCEPT
[0:0] -A zone_wan_forward -m conntrack --ctstate DNAT -m comment --comment "!fw3: Accept port forwards" -j ACCEPT
[0:0] -A zone_wan_forward -m comment --comment "!fw3" -j zone_wan_dest_REJECT
[0:0] -A zone_wan_input -m comment --comment "!fw3: Custom wan input rule chain" -j input_wan_rule
[0:0] -A zone_wan_input -p udp -m udp --dport 68 -m comment --comment "!fw3: Allow-DHCP-Renew" -j ACCEPT
[0:0] -A zone_wan_input -p icmp -m icmp --icmp-type 8 -m comment --comment "!fw3: Allow-Ping" -j ACCEPT
[0:0] -A zone_wan_input -p igmp -m comment --comment "!fw3: Allow-IGMP" -j ACCEPT
[0:0] -A zone_wan_input -m conntrack --ctstate DNAT -m comment --comment "!fw3: Accept port redirections" -j ACCEPT
[0:0] -A zone_wan_input -m comment --comment "!fw3" -j zone_wan_src_REJECT
[0:0] -A zone_wan_output -m comment --comment "!fw3: Custom wan output rule chain" -j output_wan_rule
[0:0] -A zone_wan_output -m comment --comment "!fw3" -j zone_wan_dest_ACCEPT
[0:0] -A zone_wan_src_REJECT -i eth0.2 -m comment --comment "!fw3" -j reject
COMMIT
# Completed on Sun Sep  6 16:51:09 2020

OTHER COMMANDS

root@OpenWrt:~# iptables-save -c; ip -4 addr ; ip -4 ro li tab all ; ip -4 ru; \
> ls -l  /etc/resolv.* /tmp/resolv.* /tmp/resolv.*/* ; head -n -0 /etc/resolv.* /tmp/resolv.* /tmp/resolv.*/*
# Generated by iptables-save v1.8.3 on Sun Sep  6 16:52:22 2020
*nat
:PREROUTING ACCEPT [204:27039]
:INPUT ACCEPT [71:8368]
:OUTPUT ACCEPT [34:2687]
:POSTROUTING ACCEPT [45:3347]
:postrouting_guest_rule - [0:0]
:postrouting_lan_rule - [0:0]
:postrouting_rule - [0:0]
:postrouting_wan_rule - [0:0]
:prerouting_guest_rule - [0:0]
:prerouting_lan_rule - [0:0]
:prerouting_rule - [0:0]
:prerouting_wan_rule - [0:0]
:zone_guest_postrouting - [0:0]
:zone_guest_prerouting - [0:0]
:zone_lan_postrouting - [0:0]
:zone_lan_prerouting - [0:0]
:zone_wan_postrouting - [0:0]
:zone_wan_prerouting - [0:0]
[204:27039] -A PREROUTING -m comment --comment "!fw3: Custom prerouting rule chain" -j prerouting_rule
[204:27039] -A PREROUTING -i br-lan -m comment --comment "!fw3" -j zone_lan_prerouting
[0:0] -A PREROUTING -i eth0.2 -m comment --comment "!fw3" -j zone_wan_prerouting
[0:0] -A PREROUTING -i wlan1-1 -m comment --comment "!fw3" -j zone_guest_prerouting
[45:3347] -A POSTROUTING -m comment --comment "!fw3: Custom postrouting rule chain" -j postrouting_rule
[11:660] -A POSTROUTING -o br-lan -m comment --comment "!fw3" -j zone_lan_postrouting
[0:0] -A POSTROUTING -o eth0.2 -m comment --comment "!fw3" -j zone_wan_postrouting
[0:0] -A POSTROUTING -o wlan1-1 -m comment --comment "!fw3" -j zone_guest_postrouting
[0:0] -A zone_guest_postrouting -m comment --comment "!fw3: Custom guest postrouting rule chain" -j postrouting_guest_rule
[0:0] -A zone_guest_postrouting -m comment --comment "!fw3" -j MASQUERADE
[0:0] -A zone_guest_prerouting -m comment --comment "!fw3: Custom guest prerouting rule chain" -j prerouting_guest_rule
[11:660] -A zone_lan_postrouting -m comment --comment "!fw3: Custom lan postrouting rule chain" -j postrouting_lan_rule
[204:27039] -A zone_lan_prerouting -m comment --comment "!fw3: Custom lan prerouting rule chain" -j prerouting_lan_rule
[0:0] -A zone_wan_postrouting -m comment --comment "!fw3: Custom wan postrouting rule chain" -j postrouting_wan_rule
[0:0] -A zone_wan_postrouting -m comment --comment "!fw3" -j MASQUERADE
[0:0] -A zone_wan_prerouting -m comment --comment "!fw3: Custom wan prerouting rule chain" -j prerouting_wan_rule
COMMIT
# Completed on Sun Sep  6 16:52:22 2020
# Generated by iptables-save v1.8.3 on Sun Sep  6 16:52:22 2020
*mangle
:PREROUTING ACCEPT [1596:184313]
:INPUT ACCEPT [1430:163662]
:FORWARD ACCEPT [44:2640]
:OUTPUT ACCEPT [1219:414449]
:POSTROUTING ACCEPT [1257:416561]
[0:0] -A FORWARD -o eth0.2 -p tcp -m tcp --tcp-flags SYN,RST SYN -m comment --comment "!fw3: Zone wan MTU fixing" -j TCPMSS --clamp-mss-to-pmtu
[0:0] -A FORWARD -i eth0.2 -p tcp -m tcp --tcp-flags SYN,RST SYN -m comment --comment "!fw3: Zone wan MTU fixing" -j TCPMSS --clamp-mss-to-pmtu
COMMIT
# Completed on Sun Sep  6 16:52:22 2020
# Generated by iptables-save v1.8.3 on Sun Sep  6 16:52:22 2020
*filter
:INPUT ACCEPT [0:0]
:FORWARD DROP [0:0]
:OUTPUT ACCEPT [0:0]
:forwarding_guest_rule - [0:0]
:forwarding_lan_rule - [0:0]
:forwarding_rule - [0:0]
:forwarding_wan_rule - [0:0]
:input_guest_rule - [0:0]
:input_lan_rule - [0:0]
:input_rule - [0:0]
:input_wan_rule - [0:0]
:output_guest_rule - [0:0]
:output_lan_rule - [0:0]
:output_rule - [0:0]
:output_wan_rule - [0:0]
:reject - [0:0]
:syn_flood - [0:0]
:zone_guest_dest_ACCEPT - [0:0]
:zone_guest_dest_REJECT - [0:0]
:zone_guest_forward - [0:0]
:zone_guest_input - [0:0]
:zone_guest_output - [0:0]
:zone_guest_src_REJECT - [0:0]
:zone_lan_dest_ACCEPT - [0:0]
:zone_lan_dest_DROP - [0:0]
:zone_lan_forward - [0:0]
:zone_lan_input - [0:0]
:zone_lan_output - [0:0]
:zone_lan_src_ACCEPT - [0:0]
:zone_wan_dest_ACCEPT - [0:0]
:zone_wan_dest_REJECT - [0:0]
:zone_wan_forward - [0:0]
:zone_wan_input - [0:0]
:zone_wan_output - [0:0]
:zone_wan_src_REJECT - [0:0]
[294:22446] -A INPUT -i lo -m comment --comment "!fw3" -j ACCEPT
[1136:141216] -A INPUT -m comment --comment "!fw3: Custom input rule chain" -j input_rule
[766:104786] -A INPUT -m conntrack --ctstate RELATED,ESTABLISHED -m comment --comment "!fw3" -j ACCEPT
[3:156] -A INPUT -p tcp -m tcp --tcp-flags FIN,SYN,RST,ACK SYN -m comment --comment "!fw3" -j syn_flood
[370:36430] -A INPUT -i br-lan -m comment --comment "!fw3" -j zone_lan_input
[0:0] -A INPUT -i eth0.2 -m comment --comment "!fw3" -j zone_wan_input
[0:0] -A INPUT -i wlan1-1 -m comment --comment "!fw3" -j zone_guest_input
[44:2640] -A FORWARD -m comment --comment "!fw3: Custom forwarding rule chain" -j forwarding_rule
[0:0] -A FORWARD -m conntrack --ctstate RELATED,ESTABLISHED -m comment --comment "!fw3" -j ACCEPT
[44:2640] -A FORWARD -i br-lan -m comment --comment "!fw3" -j zone_lan_forward
[0:0] -A FORWARD -i eth0.2 -m comment --comment "!fw3" -j zone_wan_forward
[0:0] -A FORWARD -i wlan1-1 -m comment --comment "!fw3" -j zone_guest_forward
[0:0] -A FORWARD -m comment --comment "!fw3" -j reject
[294:22446] -A OUTPUT -o lo -m comment --comment "!fw3" -j ACCEPT
[919:391475] -A OUTPUT -m comment --comment "!fw3: Custom output rule chain" -j output_rule
[919:391475] -A OUTPUT -m conntrack --ctstate RELATED,ESTABLISHED -m comment --comment "!fw3" -j ACCEPT
[0:0] -A OUTPUT -o br-lan -m comment --comment "!fw3" -j zone_lan_output
[0:0] -A OUTPUT -o eth0.2 -m comment --comment "!fw3" -j zone_wan_output
[0:0] -A OUTPUT -o wlan1-1 -m comment --comment "!fw3" -j zone_guest_output
[0:0] -A reject -p tcp -m comment --comment "!fw3" -j REJECT --reject-with tcp-reset
[0:0] -A reject -m comment --comment "!fw3" -j REJECT --reject-with icmp-port-unreachable
[3:156] -A syn_flood -p tcp -m tcp --tcp-flags FIN,SYN,RST,ACK SYN -m limit --limit 25/sec --limit-burst 50 -m comment --comment "!fw3" -j RETURN
[0:0] -A syn_flood -m comment --comment "!fw3" -j DROP
[0:0] -A zone_guest_dest_ACCEPT -o wlan1-1 -m conntrack --ctstate INVALID -m comment --comment "!fw3: Prevent NAT leakage" -j DROP
[0:0] -A zone_guest_dest_ACCEPT -o wlan1-1 -m comment --comment "!fw3" -j ACCEPT
[0:0] -A zone_guest_dest_REJECT -o wlan1-1 -m comment --comment "!fw3" -j reject
[0:0] -A zone_guest_forward -m comment --comment "!fw3: Custom guest forwarding rule chain" -j forwarding_guest_rule
[0:0] -A zone_guest_forward -d 192.168.123.0/24 -m comment --comment "!fw3: Block Guest to LAN" -j zone_lan_dest_DROP
[0:0] -A zone_guest_forward -m comment --comment "!fw3: Zone guest to lan forwarding policy" -j zone_lan_dest_ACCEPT
[0:0] -A zone_guest_forward -m conntrack --ctstate DNAT -m comment --comment "!fw3: Accept port forwards" -j ACCEPT
[0:0] -A zone_guest_forward -m comment --comment "!fw3" -j zone_guest_dest_REJECT
[0:0] -A zone_guest_input -m comment --comment "!fw3: Custom guest input rule chain" -j input_guest_rule
[0:0] -A zone_guest_input -p udp -m udp --dport 67:68 -m comment --comment "!fw3: Guest DHCP" -j ACCEPT
[0:0] -A zone_guest_input -p tcp -m tcp --dport 53 -m comment --comment "!fw3: Guest DNS" -j ACCEPT
[0:0] -A zone_guest_input -p udp -m udp --dport 53 -m comment --comment "!fw3: Guest DNS" -j ACCEPT
[0:0] -A zone_guest_input -m conntrack --ctstate DNAT -m comment --comment "!fw3: Accept port redirections" -j ACCEPT
[0:0] -A zone_guest_input -m comment --comment "!fw3" -j zone_guest_src_REJECT
[0:0] -A zone_guest_output -m comment --comment "!fw3: Custom guest output rule chain" -j output_guest_rule
[0:0] -A zone_guest_output -m comment --comment "!fw3" -j zone_guest_dest_ACCEPT
[0:0] -A zone_guest_src_REJECT -i wlan1-1 -m comment --comment "!fw3" -j reject
[44:2640] -A zone_lan_dest_ACCEPT -o br-lan -m comment --comment "!fw3" -j ACCEPT
[0:0] -A zone_lan_dest_DROP -o br-lan -m comment --comment "!fw3" -j DROP
[44:2640] -A zone_lan_forward -m comment --comment "!fw3: Custom lan forwarding rule chain" -j forwarding_lan_rule
[44:2640] -A zone_lan_forward -m comment --comment "!fw3: Zone lan to wan forwarding policy" -j zone_wan_dest_ACCEPT
[0:0] -A zone_lan_forward -m conntrack --ctstate DNAT -m comment --comment "!fw3: Accept port forwards" -j ACCEPT
[44:2640] -A zone_lan_forward -m comment --comment "!fw3" -j zone_lan_dest_ACCEPT
[370:36430] -A zone_lan_input -m comment --comment "!fw3: Custom lan input rule chain" -j input_lan_rule
[0:0] -A zone_lan_input -m conntrack --ctstate DNAT -m comment --comment "!fw3: Accept port redirections" -j ACCEPT
[370:36430] -A zone_lan_input -m comment --comment "!fw3" -j zone_lan_src_ACCEPT
[0:0] -A zone_lan_output -m comment --comment "!fw3: Custom lan output rule chain" -j output_lan_rule
[0:0] -A zone_lan_output -m comment --comment "!fw3" -j zone_lan_dest_ACCEPT
[370:36430] -A zone_lan_src_ACCEPT -i br-lan -m conntrack --ctstate NEW,UNTRACKED -m comment --comment "!fw3" -j ACCEPT
[0:0] -A zone_wan_dest_ACCEPT -o eth0.2 -m conntrack --ctstate INVALID -m comment --comment "!fw3: Prevent NAT leakage" -j DROP
[0:0] -A zone_wan_dest_ACCEPT -o eth0.2 -m comment --comment "!fw3" -j ACCEPT
[0:0] -A zone_wan_dest_REJECT -o eth0.2 -m comment --comment "!fw3" -j reject
[0:0] -A zone_wan_forward -m comment --comment "!fw3: Custom wan forwarding rule chain" -j forwarding_wan_rule
[0:0] -A zone_wan_forward -p esp -m comment --comment "!fw3: Allow-IPSec-ESP" -j zone_lan_dest_ACCEPT
[0:0] -A zone_wan_forward -p udp -m udp --dport 500 -m comment --comment "!fw3: Allow-ISAKMP" -j zone_lan_dest_ACCEPT
[0:0] -A zone_wan_forward -m conntrack --ctstate DNAT -m comment --comment "!fw3: Accept port forwards" -j ACCEPT
[0:0] -A zone_wan_forward -m comment --comment "!fw3" -j zone_wan_dest_REJECT
[0:0] -A zone_wan_input -m comment --comment "!fw3: Custom wan input rule chain" -j input_wan_rule
[0:0] -A zone_wan_input -p udp -m udp --dport 68 -m comment --comment "!fw3: Allow-DHCP-Renew" -j ACCEPT
[0:0] -A zone_wan_input -p icmp -m icmp --icmp-type 8 -m comment --comment "!fw3: Allow-Ping" -j ACCEPT
[0:0] -A zone_wan_input -p igmp -m comment --comment "!fw3: Allow-IGMP" -j ACCEPT
[0:0] -A zone_wan_input -m conntrack --ctstate DNAT -m comment --comment "!fw3: Accept port redirections" -j ACCEPT
[0:0] -A zone_wan_input -m comment --comment "!fw3" -j zone_wan_src_REJECT
[0:0] -A zone_wan_output -m comment --comment "!fw3: Custom wan output rule chain" -j output_wan_rule
[0:0] -A zone_wan_output -m comment --comment "!fw3" -j zone_wan_dest_ACCEPT
[0:0] -A zone_wan_src_REJECT -i eth0.2 -m comment --comment "!fw3" -j reject
COMMIT
# Completed on Sun Sep  6 16:52:22 2020
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1000
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
6: br-lan: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP qlen 1000
    inet 192.168.123.5/24 brd 192.168.123.255 scope global br-lan
       valid_lft forever preferred_lft forever
11: wlan1-1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP qlen 1000
    inet 192.168.80.1/24 brd 192.168.80.255 scope global wlan1-1
       valid_lft forever preferred_lft forever
default via 192.168.123.1 dev br-lan
192.168.80.0/24 dev wlan1-1 scope link  src 192.168.80.1
192.168.123.0/24 dev br-lan scope link  src 192.168.123.5
broadcast 127.0.0.0 dev lo table local scope link  src 127.0.0.1
local 127.0.0.0/8 dev lo table local scope host  src 127.0.0.1
local 127.0.0.1 dev lo table local scope host  src 127.0.0.1
broadcast 127.255.255.255 dev lo table local scope link  src 127.0.0.1
broadcast 192.168.80.0 dev wlan1-1 table local scope link  src 192.168.80.1
local 192.168.80.1 dev wlan1-1 table local scope host  src 192.168.80.1
broadcast 192.168.80.255 dev wlan1-1 table local scope link  src 192.168.80.1
broadcast 192.168.123.0 dev br-lan table local scope link  src 192.168.123.5
local 192.168.123.5 dev br-lan table local scope host  src 192.168.123.5
broadcast 192.168.123.255 dev br-lan table local scope link  src 192.168.123.5
0:      from all lookup local
32766:  from all lookup main
32767:  from all lookup default
ls: /tmp/resolv.*/*: No such file or directory
lrwxrwxrwx    1 root     root            16 Sep  6 16:19 /etc/resolv.conf -> /tmp/resolv.conf
-rw-r--r--    1 root     root            32 Sep  6 16:45 /tmp/resolv.conf
-rw-r--r--    1 root     root             0 Sep  6 16:44 /tmp/resolv.conf.auto
==> /etc/resolv.conf <==
search lan
nameserver 127.0.0.1

==> /tmp/resolv.conf <==
search lan
nameserver 127.0.0.1

==> /tmp/resolv.conf.auto <==
head: /tmp/resolv.*/*: No such file or directory
30
  1. dns is missing from lan interface
  2. guest dhcp range goes out of the subnet, reduce limit to 150.
  3. lan zone hasn't masquerade enabled.
  4. guest zone has masquerade enabled.
    That should be all.
3 Likes
31

It worked ! Thank you very much for your time @trendy

1 Like
32

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