[Solved] Can't connect to WAN static IP on ASUS TUF-AX4200

thewebmasterp · December 31, 2023, 5:06pm

Hi all! Got an ASUS TUF-AX4200 a few days ago and flashed OpenWrt through serial successfully but can't connect to a WAN static IP.

Here's what I've tried:

I have an old TP-Link with OpenWrt installed which connects to the WAN flawlessly. I enter the interface, go to Network/Interfaces, change the protocol to "Static address", enter in the details and it works. Following the same steps on the ASUS TUF-AX4200, it doesn't
I read that since v21.02 DSA support has been added to OpenWrt so I followed those instructions for additional setup I found on Reddit, multiple times with slight differences of the config to no avail.
Tried changing the config so that lan4 is used as the WAN port if the actual WAN port (eth0) has flaws but it didn't help
Tried all of the steps above on three versions of OpenWrt:

23.05.0 (suggested in wiki)
23.05.1
23.05.2 (the one I'm on currently)

Since the forum allows me to post only one image, I merged all these screenshots in case they'd be of help:

Please let me know if you need any additional info, thanks!

frollic · December 31, 2023, 5:12pm

tried cloning the TP-Links WAN IP, and putting it on the WAN port of the TUF ?

psherman · December 31, 2023, 5:42pm

Please connect to your OpenWrt device using ssh and copy the output of the following commands and post it here using the "Preformatted text </> " button:

Remember to redact passwords, MAC addresses and any public IP addresses you may have:

ubus call system board
cat /etc/config/network
cat /etc/config/wireless
cat /etc/config/dhcp
cat /etc/config/firewall

thewebmasterp · January 1, 2024, 1:15am

$ ubus call system board


{
	"kernel": "5.15.137",
	"hostname": "OpenWr",
	"system": "ARMv8 Processor rev 4",
	"model": "ASUS TUF-AX4200",
	"board_name": "asus,tuf-ax4200",
	"rootfs_type": "squashfs",
	"release": {
		"distribution": "OpenWrt",
		"version": "23.05.2",
		"revision": "r23630-842932a63d",
		"target": "mediatek/filogic",
		"description": "OpenWrt 23.05.2 r23630-842932a63d"
	}
}

$ cat /etc/config/network


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 ula_prefix 'fd90:d375:66e4::/48'

config device
	option name 'br-lan'
	option type 'bridge'
	list ports 'eth0'
	list ports 'eth1'
	list ports 'lan1'
	list ports 'lan2'
	list ports 'lan3'
	list ports 'lan4'
	option bridge_empty '1'

config device
	option name 'lan1'
	option macaddr 'xx:xx:xx:xx:xx:xx'

config device
	option name 'lan2'
	option macaddr 'xx:xx:xx:xx:xx:xx'

config device
	option name 'lan3'
	option macaddr 'xx:xx:xx:xx:xx:xx'

config device
	option name 'lan4'
	option macaddr 'xx:xx:xx:xx:xx:xx'

config interface 'lan'
	option device 'br-lan.1'
	option proto 'static'
	option ipaddr '192.168.1.1'
	option netmask '255.255.255.0'
	option ip6assign '60'

config device
	option name 'eth1'
	option macaddr '---'

config interface 'wan'
	option device 'br-lan.2'
	option proto 'static'
	option ipaddr 'xxx.xxx.xxx.xxx'
	option netmask '255.255.255.0'
	option gateway 'xxx.xxx.xxx.x'
	list dns 'xxx.xxx.xxx.x'
	list dns 'xxx.xxx.xxx.x'
	list dns 'x.x.x.x'

config interface 'wan6'
	option device 'br-lan.2'
	option proto 'dhcpv6'
	option reqaddress 'try'
	option reqprefix 'auto'

config bridge-vlan
	option device 'br-lan'
	option vlan '1'
	list ports 'eth0:t'
	list ports 'lan1'
	list ports 'lan2'
	list ports 'lan3'
	list ports 'lan4'

config bridge-vlan
	option device 'br-lan'
	option vlan '2'
	list ports 'eth0:t'
	list ports 'eth1'

$ cat /etc/config/wireless


config wifi-device 'radio0'
	option type 'mac80211'
	option path 'platform/soc/18000000.wifi'
	option channel '1'
	option band '2g'
	option htmode 'HE20'
	option cell_density '0'

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

config wifi-device 'radio1'
	option type 'mac80211'
	option path 'platform/soc/18000000.wifi+1'
	option channel '36'
	option band '5g'
	option htmode 'HE80'
	option disabled '1'

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

$ cat /etc/config/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 cachesize '1000'
	option authoritative '1'
	option readethers '1'
	option leasefile '/tmp/dhcp.leases'
	option resolvfile '/tmp/resolv.conf.d/resolv.conf.auto'
	option nonwildcard '1'
	option localservice '1'
	option ednspacket_max '1232'
	option filter_aaaa '0'
	option filter_a '0'

config dhcp 'lan'
	option interface 'lan'
	option start '100'
	option limit '150'
	option leasetime '12h'
	option dhcpv4 'server'
	option dhcpv6 'server'
	option ra 'server'
	list ra_flags 'managed-config'
	list ra_flags 'other-config'

config dhcp 'wan'
	option interface 'wan'
	option ignore '1'
	option start '100'
	option limit '150'
	option leasetime '12h'

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

cat /etc/config/firewall

config defaults
	option syn_flood	1
	option input		REJECT
	option output		ACCEPT
	option forward		REJECT
# Uncomment this line to disable ipv6 rules
#	option disable_ipv6	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

# We need to accept udp packets on port 68,
# see https://dev.openwrt.org/ticket/4108
config rule
	option name		Allow-DHCP-Renew
	option src		wan
	option proto		udp
	option dest_port	68
	option target		ACCEPT
	option family		ipv4

# Allow IPv4 ping
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

# Allow DHCPv6 replies
# see https://github.com/openwrt/openwrt/issues/5066
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

# Allow essential incoming IPv6 ICMP traffic
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

# Allow essential forwarded IPv6 ICMP traffic
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


### EXAMPLE CONFIG SECTIONS
# do not allow a specific ip to access wan
#config rule
#	option src		lan
#	option src_ip	192.168.45.2
#	option dest		wan
#	option proto	tcp
#	option target	REJECT

# block a specific mac on wan
#config rule
#	option dest		wan
#	option src_mac	xx:xx:xx:xx:xx:xx
#	option target	REJECT

# block incoming ICMP traffic on a zone
#config rule
#	option src		lan
#	option proto	ICMP
#	option target	DROP

# port redirect port coming in on wan to lan
#config redirect
#	option src			wan
#	option src_dport	80
#	option dest			lan
#	option dest_ip		192.168.16.235
#	option dest_port	80
#	option proto		tcp

# port redirect of remapped ssh port (22001) on wan
#config redirect
#	option src		wan
#	option src_dport	22001
root@OpenWr:~# cat /etc/config/firewall
config defaults
	option syn_flood	1
	option input		REJECT
	option output		ACCEPT
	option forward		REJECT
# Uncomment this line to disable ipv6 rules
#	option disable_ipv6	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

# We need to accept udp packets on port 68,
# see https://dev.openwrt.org/ticket/4108
config rule
	option name		Allow-DHCP-Renew
	option src		wan
	option proto		udp
	option dest_port	68
	option target		ACCEPT
	option family		ipv4

# Allow IPv4 ping
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

# Allow DHCPv6 replies
# see https://github.com/openwrt/openwrt/issues/5066
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

# Allow essential incoming IPv6 ICMP traffic
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

# Allow essential forwarded IPv6 ICMP traffic
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


### EXAMPLE CONFIG SECTIONS
# do not allow a specific ip to access wan
#config rule
#	option src		lan
#	option src_ip	192.168.45.2
#	option dest		wan
#	option proto	tcp
#	option target	REJECT

# block a specific mac on wan
#config rule
#	option dest		wan
#	option src_mac	00:11:22:33:44:66
#	option target	REJECT

# block incoming ICMP traffic on a zone
#config rule
#	option src		lan
#	option proto	ICMP
#	option target	DROP

# port redirect port coming in on wan to lan
#config redirect
#	option src			wan
#	option src_dport	80
#	option dest			lan
#	option dest_ip		192.168.16.235
#	option dest_port	80
#	option proto		tcp

# port redirect of remapped ssh port (22001) on wan
#config redirect
#	option src		wan
#	option src_dport	22001
#	option dest		lan
#	option dest_port	22
#	option proto		tcp

### FULL CONFIG SECTIONS
#config rule
#	option src		lan
#	option src_ip	192.168.45.2
#	option src_mac	00:11:22:33:44:55
#	option src_port	80
#	option dest		wan
#	option dest_ip	194.25.2.129
#	option dest_port	120
#	option proto	tcp
#	option target	REJECT

#config redirect
#	option src		lan
#	option src_ip	192.168.45.2
#	option src_mac	00:11:22:33:44:55
#	option src_port		1024
#	option src_dport	80
#	option dest_ip	194.25.2.129
#	option dest_port	120
#	option proto	tcp

psherman · January 1, 2024, 1:18am

Where does the upstream connection come from (what kind of device and to what physical port)? And is it tagged (if so what VLAN)?

I see your wan using br-lan.2 which is tagged on eth0 and untagged on eth1. We need to know how it is connected and why you have the wan in a bridge.

thewebmasterp · January 1, 2024, 1:21am

Yes, I tried replicating the same configuration on the TUF as on the TP-Link, especially double checked the WAN configs. Important to know that the TP-Link which I configure without issues is TP-Link TL-WR840N v2 which uses OpenWrt 18.06.9 (pre-DSA support)

psherman · January 1, 2024, 1:22am

ok... but why is the wan in a bridge? what is connected to eth0? And what is connected to eth1? Where does the internet connection connect?

thewebmasterp · January 1, 2024, 1:45am

Where does the upstream connection come from (what kind of device and to what physical port)?

The upstream connection comes from a modem (my ISP) and connects to the router to the WAN physical port. All they've provided me is a static IP, the default gateway and subnet mask 255.255.255.0.

And is it tagged (if so what VLAN)?

To my knowledge it shouldn't be tagged.

I see your wan using br-lan.2 which is tagged on eth0 and untagged on eth1. We need to know how it is connected and why you have the wan in a bridge.

So my understanding is that eth0 is the router's cpu so it needs to be aware of the VLAN filterings we're doing. That's why on the 2 VLAN's I have, eth0 interface is set to "T" (tagged), so it's aware of the vlans. I might be wrong!

eth1 is the WAN physical port therefore on br-lan.1 I leave it as "Not Member" and set lan1..4 to "Untagged" (so that br-lan.1 is then connected to the lan interface under "Interfaces" tab)

Contrary, on br-lan.2 I set eth1 as untagged so that all traffic coming at eth1 would be let through to br-lan.2 and all of the rest lan1..4 are set as "Not Member" so that packets on those 4 lan ports won't come at the br-lan.2.

Thus I have two VLANs - br-lan.1 which is for LAN and br-lan.2 for WAN. Then what I do is I use these under the "Interfaces tab" instead of the physical devices.

EDIT:
To my understanding this additional layer of VLAN's is required in order for the LAN network to be able to access the WAN network and without it they'd just stay separated from one another

psherman · January 1, 2024, 1:51am

Ok... I'm pretty sure this config is messed up, but I don't know what the default should look like for your device (each device is a bit different). If your device is properly DSA, it likely doesn't expose eth0 and eth1 as ports; if it is swconfig or has individually routed ports, it would expose those.

The best route here is to simply reset to defaults. From there, you can post your /etc/config/network file and we can get it sorted out.

Feel free to take a backup before you do the reset, but I don't think we'll be using that backup at all.

thewebmasterp · January 1, 2024, 2:15am

This is /etc/config/network after "reset to defaults" (only user password changed)

$ cat /etc/config/network

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 ula_prefix 'fd5f:g3dd:1ce8::/48'

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

config device
	option name 'lan1'
	option macaddr '-'

config device
	option name 'lan2'
	option macaddr '-'

config device
	option name 'lan3'
	option macaddr '-'

config device
	option name 'lan4'
	option macaddr '-'

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 device
	option name 'eth1'
	option macaddr '-'

config interface 'wan'
	option device 'eth1'
	option proto 'dhcp'

config interface 'wan6'
	option device 'eth1'
	option proto 'dhcpv6'

After this I'd expect to go to the WAN interface and set it up as follows through luCI (posting the diff before "save & apply"):

# /etc/config/dhcp
uci set dhcp.wan.start='100'
uci set dhcp.wan.limit='150'
uci set dhcp.wan.leasetime='12h'
# /etc/config/network
uci set network.wan.proto='static'
uci set network.wan.ipaddr='xxx.xxx.xxx.xxx'
uci set network.wan.netmask='255.255.255.0'
uci set network.wan.gateway='xxx.xxx.211.1'
uci add_list network.wan.dns='xxx.xxx.192.1'
uci add_list network.wan.dns='xxx.xxx.192.2'
uci add_list network.wan.dns='8.8.8.8'

But obviously this doesn't work at all..

LilRedDog · January 1, 2024, 2:19am

They tried to make lan4 eth1 because they worried eth0 might be bad.

But something did not stick because they still have a lan4 port in br-lan and, obviously, this configuration is not going to work.
And according to LuCI, all of his ports are bridged to br-lan.

psherman · January 1, 2024, 2:19am

All you need to do is change this:

to this:

config interface 'wan'
	option device 'eth1'
	option proto 'static'
	option ipaddr '<IP.from.your.isp>'
	option netmask '<subnet.from.your.isp>'
	option gateway '<gateway.from.your.isp>'
	option dns '<dns.from.your.isp>'

(DNS can be a public DNS if you prefer).

thewebmasterp · January 1, 2024, 2:30am

I did change the config to what you suggested but still to no avail

config interface 'wan'
	option device 'eth1'
	option proto 'static'
	option ipaddr 'xxx.xxx.xxx.xxx'
	option netmask '255.255.255.0'
	option gateway 'xxx.xxx.xxx.1'
        option dns '8.8.8.8'

psherman · January 1, 2024, 2:32am

is this the netmask the ISP gave you?

And is this the gateway from the ISP?

Have you tried connecting a computer directly to the modem and configuring your computer's interface with the same static IP info that the ISP gave you?

thewebmasterp · January 1, 2024, 2:37am

This is not the first time I'm trying out this config handed me by the ISP, it worked flawlessly for months on my old TP-Link. I can even wire it up now and extract logs from it if needed (it's running OpenWrt too). Thanks for sticking with the issue and helping out by the way!!

psherman · January 1, 2024, 2:37am

Is this address, by any chance 192.168.1.1?

LilRedDog · January 1, 2024, 2:38am

Try cloning your old router's mac on the new one and why do your lan ports have mac addresses?

I see now, they are vlans.

thewebmasterp · January 1, 2024, 2:40am

No, the first 3 bits (xxx.xxx.xxx) of my gateway are the same as the first 3 bits of ipaddr

psherman · January 1, 2024, 2:42am

and to verify, the first to octets are not 192.168, correct?

The reason to test it on a regular computer is to make sure it isn't locked against the MAC address of your old router or to confirm that it is working as expected on a different device.

thewebmasterp · January 1, 2024, 2:49am

I haven't tried assigning the old MAC address to my new router. Does the MAC address of the device change after you install OpenWrt? I guess it does. And if so MAC shouldn't be the issue in my case.