Newbie with OpenWrt. DNS problem IP ok but not URL

ggcom · July 1, 2022, 7:31pm

Hi,
I've got a new installation on a TP-Link Archer C7 v5.
OpenWrt 21.02.3 r16554-1d4dea6d4f / LuCI openwrt-21.02 branch git-22.083.69138-0a0ce2a
LAN : 192.168.10.1 / WAN 192.168.1.251
I can ping IP address
̀

ping 216.58.201.227
PING 216.58.201.227 (216.58.201.227) 56(84) bytes of data.
64 bytes from 216.58.201.227: icmp_seq=1 ttl=248 time=13.3 ms
64 bytes from 216.58.201.227: icmp_seq=2 ttl=248 time=12.8 ms
64 bytes from 216.58.201.227: icmp_seq=3 ttl=248 time=12.8 ms
^C
--- 216.58.201.227 ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2003ms
rtt min/avg/max/mdev = 12.820/12.995/13.330/0.236 ms

but not an url :

ping google.fr
ping: google.fr: Name or service unknown

Can you have an idea ?
If you know the documentation where is the solution, I take it

Thanks a lot

dig google.fr @192.168.10.1

; <<>> DiG 9.18.1-1ubuntu1.1-Ubuntu <<>> google.fr @192.168.10.1
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 64828
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
;; QUESTION SECTION:
;google.fr.			IN	A

;; ANSWER SECTION:
google.fr.		183	IN	A	216.58.201.227

;; Query time: 11 msec
;; SERVER: 192.168.10.1#53(192.168.10.1) (UDP)
;; WHEN: Fri Jul 01 21:16:06 CEST 2022
;; MSG SIZE  rcvd: 54

psherman · July 1, 2022, 7:41pm

sounds like you have a DNS issue.

Please 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:

cat /etc/config/network
cat /etc/config/dhcp
cat /etc/config/firewall

ggcom · July 1, 2022, 7:47pm

# 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 'fdbe:c30b:018d::/48'

config device
	option name 'br-lan'
	option type 'bridge'
	list ports 'eth0.1'

config interface 'lan'
	option device 'br-lan'
	option proto 'static'
	option ipaddr '192.168.10.1'
	option netmask '255.255.255.0'
	option ip6assign '60'

config device
	option name 'eth0.2'
	option macaddr '00:31:92:b1:21:ea'

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

config interface 'wan6'
	option device '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'
# 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 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'

config dhcp 'lan'
	option interface 'lan'
	option start '100'
	option limit '150'
	option leasetime '2m'
	option dhcpv4 'server'
	option dhcpv6 'server'
	option ra 'server'
	option ra_slaac '1'
	list ra_flags 'managed-config'
	list ra_flags 'other-config'

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'

and the last

# cat /etc/config/firewall 
config defaults
	option syn_flood	1
	option input		ACCEPT
	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://dev.openwrt.org/ticket/10381
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

# 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

# allow interoperability with traceroute classic
# note that traceroute uses a fixed port range, and depends on getting
# back ICMP Unreachables.  if we're operating in DROP mode, it won't
# work so we explicitly REJECT packets on these ports.
config rule
	option name		Support-UDP-Traceroute
	option src		wan
	option dest_port	33434:33689
	option proto		udp
	option family		ipv4
	option target		REJECT
	option enabled		false

# include a file with users custom iptables rules
config include
	option path /etc/firewall.user


### 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

I don't read the /etc/config/firewall
Thanks for idea

psherman · July 1, 2022, 8:43pm

Is your upstream router providing DHCP? And if so, is it advertising a DNS server?

ggcom · July 1, 2022, 8:46pm

Yes
I install nmcli to confirm it ?

ggcom · July 1, 2022, 8:50pm

from openwrt traceroute is ok

# traceroute google.fr
traceroute to google.fr (2a00:1450:4007:80d::2003), 30 hops max, 64 byte packets
 1  box (2a02:xxxx:xxxx:xxxx::1)  0.703 ms  0.603 ms  0.588 ms

psherman · July 1, 2022, 8:50pm

What is the output of:

 cat /tmp/resolv.conf.d/resolv.conf.auto

ggcom · July 1, 2022, 8:52pm

#  cat /tmp/resolv.conf.d/resolv.conf.auto
# Interface wan
nameserver 192.168.1.1
# Interface wan6
nameserver 2a02:xxxx:xxxx:xxxx::1

ggcom · July 1, 2022, 8:52pm

same nameserver 2a02 as traceroute

psherman · July 1, 2022, 9:22pm

So DNS resolution works from your router... does it fall on all client devices, or only the one that was shown at the beginning?

ggcom · July 1, 2022, 9:32pm

I think you find something
My smartphone with wifi can connect to an URL.
I'm trying with ethernet

psherman · July 1, 2022, 9:35pm

Check the DNS settings for the device that is failing (from the first post)... it is possible it has something invalid.

ggcom · July 1, 2022, 9:56pm

I don't know why but ping google.fr work in root
OpenWRT is OK but not my connexion
Edit
work with user
I think I make a mistake and when I unplugged wire everything go to the correct configuration
Thanks a lot psherman
I have 2 activ connexionswhen it's working
With only OpenWRT, that 's not working sniff

psherman · July 1, 2022, 10:13pm

I'm not sure if there is still an issue... if so, can you elaborate on the above.

otherwise...

If your problem is solved, please consider marking this topic as [Solved]. See How to mark a topic as [Solved] for a short how-to.

ggcom · July 1, 2022, 10:34pm

# traceroute6 2a02:xxxx:xxxx:xxxx::1
traceroute vers 2a02:xxxx:xxxx:xxxx::1 (2a02:xxxx:xxxx:xxxx::1) de fdbe:c30b:18d:0:b87f:35f0:49db:80d6, port 33434, du port 32509, 30 sauts max, 60 octets/paquet
 1  fdbe:c30b:18d::1 (fdbe:c30b:18d::1)  0.482 ms  * 0.498 ms 
 2  * * *        
 3  * * *        
...
30 * * *

2a02:xxxx:xxxx:xxxx::1 is the IPv6 of my ISP routeur
fdbe:c30b:18d::1 is the IPv6 of openwrt
ping IPv4 : work fine
ping IPv6 : not work
I go to sleep tomorrow it's a sunny day