DNS Setting to Google Failed

Installing and Using OpenWrt
1

Hello,

Theese is MY Router Info:

Hostname	OpenWrt
Model	ASUS RT-AC58U
Architecture	ARMv7 Processor rev 5 (v7l)
Target Platform	ipq40xx/generic
Firmware Version	OpenWrt 23.05.5 r24106-10cc5fcd00 / LuCI openwrt-23.05 branch git-24.264.56413-c7a3562
Kernel Version	5.15.167
Local Time	2024-10-16 23:50:58
Uptime	0h 19m 17s
Load Average	0.00, 0.00, 0.00

I tried Modify My DNS to Google 8.8.8.8

Modfiy /etc/config/dhcp:

config dnsmasq
    option domainneeded '1'
    option localise_queries '1'
    option rebind_protection '1'
    option rebind_localhost '1'
    option local '/lan/'
    option domain 'lan'
    option expandhosts '1'
    option readethers '1'
    option leasefile '/tmp/dhcp.leases'
    option localservice '1'
    option ednspacket_max '1232'
    option authoritative '1'
    list interface 'lan'
    option nonegcache '1'
    option doh_backup_noresolv '1'
    list server '8.8.8.8'  # Google DNS
    list server '8.8.4.4'

And Modify /etc/config/dhcp

config dnsmasq
    option resolvfile '/tmp/resolv.conf.auto'
    option noresolv '1'
    list server '8.8.8.8'  # 自定义的 DNS 服务器，例如 Google DNS
    list server '8.8.4.4'

And input uci add_list network.lan.dns='8.8.8.8'

Then reboot router

But input nmap -sV -p 53 localhost

I see CloudFlare DNS Not Apply Google

How Can I fix it?

Thanks!

{45A00FA6-D452-4907-B266-87FF7CD29447}
{45A00FA6-D452-4907-B266-87FF7CD29447}1032×538 25.1 KB

2

Do you have some catchall DNAT? Fingerprint should be dnsmasq, not cf

3

Tried setting the WAN network interface DNS to 8.8.8.8?

screen859

4

Bear in mind that nmap is saying that your DNS server looks like Cloudflare's public DNS (because it has a similar fingerprint), not that your DNS server is upstreaming the request to Cloudflare's public DNS (nmap cannot know that).

6

what can I check current use DNS?

7

You can enable logging on the DNS requests, and watch the logs. Or use tcpdump to inspect the packages. Or use a DNS leak test online site.

1 Like
8

Hi,I try to set theese to my dhcp file,

config dnsmasq
	option domainneeded '1'
	option localise_queries '1'
	option rebind_protection '1'
	option rebind_localhost '1'
	option local '/lan/'
	option domain 'lan'
	option expandhosts '1'
	option readethers '1'
	option leasefile '/tmp/dhcp.leases'
	option localservice '1'
	option ednspacket_max '1232'
	option authoritative '1'
	list interface 'lan'
	option nonegcache '1'
	option doh_backup_noresolv '1'
	list server '1.1.1.1'
    list server '1.0.0.1'
 	list server '168.95.1.1'
    option strictorder '1'

And run:

/etc/init.d/dnsmasq restart

It is success apply my set dns
Thanks Every One ~

9

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