DNS Resolve failed inside openwrt

I have beelink U59 Pro with dual 1GiB Nic currently running Openwrt 25.12.0-rc2 LXC inside Proxmox. For setup & testing purpose I created two network interface (eth0 & eth1) linked to same proxmox bridge vmbr0, eth0 currently acting as WAN port and eth1 acting as LAN port. DNS queries get resolved in Proxmox host and devices connect to LAN port of openwrt and internet is working in connected device. But inside openwrt terminal ping 8.8.8.8 is reachable but ping google.com is unreachable and apk update is also get fetch error. If is run echo “nameserver 192.168.8.1” > /etc/resolv.conf, everything works well until reboot. /tmp/resolv.conf.auto points to modem dns "192.168.8.1"

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 (red circle; this works best in the 'Markdown' composer view in the blue oval):

Screenshot 2025-10-20 at 8.14.14 PM

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

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

Hi, thanks for commenting. Here is the output of all commands.

root@openwrt:~# ubus call system board
{
        "kernel": "6.17.4-2-pve",
        "hostname": "openwrt",
        "system": "Intel(R) Celeron(R) N5105 @ 2.00GHz",
        "model": "AZW U59",
        "board_name": "azw-u59",
        "rootfs_type": "ext4",
        "release": {
                "distribution": "OpenWrt",
                "version": "25.12.0-rc2",
                "firmware_url": "https://downloads.openwrt.org/",
                "revision": "r32429-d76c64ad00",
                "target": "x86/64",
                "description": "OpenWrt 25.12.0-rc2 r32429-d76c64ad00",
                "builddate": "1767653330"
        }
}
root@openwrt:~# cat /etc/config/network

config interface 'loopback'
        option device 'lo'
        option proto 'static'
        list ipaddr '127.0.0.1/8'

config globals 'globals'
        option dhcp_default_duid '0004f14768daa5de441b8e0c2be8a34f9be7'
        option ula_prefix 'fd6b:887d:71c2::/48'
        option packet_steering '1'

config interface 'lan'
        option device 'eth1'
        option proto 'static'
        list ipaddr '192.168.1.1/24'
        option ip6assign '60'

config interface 'wan'
        option device 'eth0'
        option proto 'dhcp'

config interface 'wan6'
        option device 'eth0'
        option proto 'dhcpv6'
        option reqaddress 'try'
        option reqprefix 'auto'
        option norelease '1'
root@openwrt:~# 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'
        option ra_preference 'medium'

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

config odhcpd 'odhcpd'
        option maindhcp '0'
        option leasefile '/tmp/odhcpd.leases'
        option leasetrigger '/usr/sbin/odhcpd-update'
        option loglevel '4'
        option piodir '/tmp/odhcpd-piodir'
        option hostsdir '/tmp/hosts'
root@openwrt:~# 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          DROP
        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
  1. Where is the network 192.168.8.0/24?

It doesn't appear anywhere in your configuration.

  1. Also, provide the output of: nslookup google.com and nslookup downloads.openwrt.org - ran from the OpenWrt

We can't guess what your topology is.

If you are looking for a workaround that will survive a reboot, run this:

uci set dhcp.@dnsmasq[0].noresolv='1'
uci add_list dhcp.@dnsmasq[0].server='192.168.8.1'
uci commit dhcp
service dnsmasq restart

Otherwise, you will need to post more info.

1 Like

That does not sound right. WAN and LAN need to be separate networks.

1 Like

Hi, sorry for delayed response. Update, I created the fresh proxmox lxc using latest build 25.12.0-rc3 and I assigned Openwrt WAN interface to vmbr0 and Openwrt LAN interface to vmbr1. Modem to connected vmbr0 and vmbr1 is currently unused. I ran the previously stated command and following are outputs.

root@openwrt:~# ping 8.8.8.8
PING 8.8.8.8 (8.8.8.8): 56 data bytes
64 bytes from 8.8.8.8: seq=0 ttl=114 time=41.731 ms
64 bytes from 8.8.8.8: seq=1 ttl=114 time=34.503 ms
64 bytes from 8.8.8.8: seq=2 ttl=115 time=34.360 ms
64 bytes from 8.8.8.8: seq=3 ttl=115 time=33.815 ms
^Z[2]+  Stopped                    ping 8.8.8.8
root@openwrt:~# ping google.com
ping: bad address 'google.com'
root@openwrt:~# apk update
wgetFailed to send request: Operation not permitted
ERROR: wget: exited with error 4
WARNING: updating and opening https://downloads.openwrt.org/releases/25.12.0-rc3/targets/x86/64/packages/packages.adb: unexpected end of file
[fetch https://downloads.openwrt.org/releases/25.12.0-rc3/packages/x86_64/base/packages.adb]^Z[3]+  Stopped                    apk update
root@openwrt:~# nslookup google.com
nslookup: write to '127.0.0.1': Connection refused
nslookup: write to '::1': Connection refused
;; connection timed out; no servers could be reached
 
root@openwrt:~# nslookup downloads.openwrt.org
nslookup: write to '127.0.0.1': Connection refused
nslookup: write to '::1': Connection refused
;; connection timed out; no servers could be reached
 
root@openwrt:~# ubus call system board
{
        "kernel": "6.17.4-2-pve",
        "hostname": "openwrt",
        "system": "Intel(R) Celeron(R) N5105 @ 2.00GHz",
        "model": "AZW U59",
        "board_name": "azw-u59",
        "rootfs_type": "ext4",
        "release": {
                "distribution": "OpenWrt",
                "version": "25.12.0-rc3",
                "firmware_url": "https://downloads.openwrt.org/",
                "revision": "r32486-30527a4c34",
                "target": "x86/64",
                "description": "OpenWrt 25.12.0-rc3 r32486-30527a4c34",
                "builddate": "1768954854"
        }
}
root@openwrt:~# cat /etc/config/network
 
config interface 'loopback'
        option device 'lo'
        option proto 'static'
        list ipaddr '127.0.0.1/8'
 
config globals 'globals'
        option dhcp_default_duid '0004aaf59140bd034071bcaa87cf3f8cbb04'
        option ula_prefix 'fd35:8b98:abbe::/48'
 
config device
        option name 'br-lan'
        option type 'bridge'
        list ports 'eth1'
 
config interface 'lan'
        option device 'eth1'
        option proto 'static'
        list ipaddr '192.168.1.1/24'
        option ip6assign '60'
 
config interface 'wan'
        option device 'eth0'
        option proto 'dhcp'
 
config interface 'wan6'
        option device 'eth0'
        option proto 'dhcpv6'
        option reqaddress 'try'
        option reqprefix 'auto'
        option norelease '1'
        option disabled '1'
        option auto '0'
 
root@openwrt:~# 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'
        option ra_preference 'medium'
 
config dhcp 'wan'
        option interface 'wan'
        option ignore '1'
        option leasetime '12h'
        option start '100'
        option limit '150'
 
config odhcpd 'odhcpd'
        option maindhcp '0'
        option leasefile '/tmp/odhcpd.leases'
        option leasetrigger '/usr/sbin/odhcpd-update'
        option loglevel '4'
        option piodir '/tmp/odhcpd-piodir'
        option hostsdir '/tmp/hosts'
 
root@openwrt:~# 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          DROP
        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
root@openwrt:~# ubus call network.interface.wan status
{
        "up": true,
        "pending": false,
        "available": true,
        "autostart": true,
        "dynamic": false,
        "uptime": 1745,
        "l3_device": "eth0",
        "proto": "dhcp",
        "device": "eth0",
        "updated": [
                "addresses",
                "routes",
                "data"
        ],
        "metric": 0,
        "dns_metric": 0,
        "delegation": true,
        "ipv4-address": [
                {
                        "address": "192.168.8.45",
                        "mask": 24
                }
        ],
        "ipv6-address": [
 
        ],
        "ipv6-prefix": [
 
        ],
        "ipv6-prefix-assignment": [
 
        ],
        "route": [
                {
                        "target": "0.0.0.0",
                        "mask": 0,
                        "nexthop": "192.168.8.1",
                        "source": "192.168.8.45/32"
                }
        ],
        "dns-server": [
                "192.168.8.1"
        ],
        "dns-search": [
 
        ],
        "neighbors": [
 
        ],
        "inactive": {
                "ipv4-address": [
 
                ],
                "ipv6-address": [
 
                ],
                "route": [
 
                ],
                "dns-server": [
 
                ],
                "dns-search": [
 
                ],
                "neighbors": [
 
                ]
        },
        "data": {
                "dhcpserver": "192.168.8.1",
                "leasetime": 86400
        }
}
root@openwrt:~# echo "nameserver 192.168.8.1" > /etc/resolv.conf
root@openwrt:~# nslookup google.com
Server:         192.168.8.1
Address:        192.168.8.1:53
 
Non-authoritative answer:
Name:   google.com
Address: 2a00:1450:4019:817::200e
 
Non-authoritative answer:
Name:   google.com
Address: 142.250.203.174
 
root@openwrt:~# nslookup downloads.openwrt.org
Server:         192.168.8.1
Address:        192.168.8.1:53
 
Non-authoritative answer:
downloads.openwrt.org   canonical name = dualstack.j.sni.global.fastly.net
Name:   dualstack.j.sni.global.fastly.net
Address: 2a04:4e42:80::644
 
Non-authoritative answer:
downloads.openwrt.org   canonical name = dualstack.j.sni.global.fastly.net
Name:   dualstack.j.sni.global.fastly.net
Address: 146.75.66.132

I didn't have any complex network topology. As mentioned in my first post, I'm using Beelink U59 with dual nic, U59 LAN 1 is connected to Modem and inside proxmox U59 LAN 1 is connected to vmbr0 which then connected to Proxmox host and Openwrt LXC's WAN port. U59 LAN 2 is Physically not connected to anyting but inside Proxmox it is connected to vmbr1 which is then connected to Openwrt LXC's LAN port and Lubuntu VM (to test LAN connections).

By allocating different bridges to Openwrt WAN & LAN, I noticed that LAN dhcp is also not working. I asigned static ip inside VM to access Openwrt.

Thanks to @mk24 for giving hint to seperate the WAN & LAN interfaces.

Do you have dnsmasq installed? Recently, there have been some errors in the snapshot versions when building the OpenWrt image.

Hi, dnsmasq is installed but it is not running and unable to restart using /etc/init.d/dnsmasq start

root@openwrt:~# /etc/init.d/dnsmasq status
not running

Following error appears while running dnsmasq --no-daemon. can someone help me to find which services using port 53?

root@openwrt:~# dnsmasq --no-daemon

dnsmasq: failed to create listening socket for port 53: Address in use

Google netstat.

netstat -nltup | grep ":53 "
1 Like