[SOLVED] strange picture with the "dhcp-option = ...&qu

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PavelVD
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Joined: 26 Jul 2019
Posts: 86

PostPosted: Sun Nov 21, 2021 9:05    Post subject: [SOLVED] strange picture with the "dhcp-option = ...&qu Reply with quote
In the "Additional Dnsmasq Options" settings it is specified:
Code:
dhcp-option = br0,6,192.168.1.107

This is your local Pi-hole.
When I connect my laptop over LAN, it is assigned a DNS server 192.168.1.107.
If I switch to Wi-Fi, 192.168.1.1 becomes the DNS server and my Pi-hole is resting.
I checked it on three firmwares: r47656, r47608 and r47481.
In the settings "Setup-> Networking-> Current Bridging Table" the default is:
br0 no eth1 wlan0 wlan1
Is there something wrong here?

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ho1Aetoo
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Joined: 19 Feb 2019
Posts: 1375
Location: Germany

PostPosted: Sun Nov 21, 2021 11:10    Post subject: Reply with quote
I have the following in /tmp/dnsmasq.conf

dhcp-option=6,192.168.1.110

the option was added automatically as described in the following post

https://forum.dd-wrt.com/phpBB2/viewtopic.php?p=1240340#1240340


Firmware is the following on the router: DD-WRT v3.0-r47581 std (10/20/21)

Edit: manual in the additional DNSMasq options also works

Code:
dhcp-option=br0,6,192.168.1.110


PavelVD wrote:
In the "Additional Dnsmasq Options" settings it is specified:
Code:
dhcp-option = br0,6,192.168.1.107


i see spaces that do not belong there
kernel-panic69
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Posts: 12619
Location: Texas, USA

PostPosted: Sun Nov 21, 2021 11:40    Post subject: Reply with quote
To clarify all the "noise": Your additional dnsmasq config should be dhcp-option=br0,6,192.168.1.107 OR you should uncheck "Use DNSMasq for DNS" on the Setup -> Basic Setup page.
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PavelVD
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Joined: 26 Jul 2019
Posts: 86

PostPosted: Sun Nov 21, 2021 12:49    Post subject: Reply with quote
I think mentioning the Pi-hole setup here is a bit distracting from the heart of the matter.
The line "dhcp-option=br0,6,192.168.1.107" should give clients the same server regardless of the type of connection - LAN or WLAN. In reality, this is not the case.
-
If you disable "Use DNSMasq for DNS", the Internet is lost. Apparently this is due to the fact that "SmartDNS Resolver" is also disabled, which is the only upstream (via TLS) DNS server for Pi-hole.
SmartDNS - Pi-hole works great, but why only over LAN?
-
My client is a Win10x64 laptop with built-in LAN port and 2.4Gh Wi-Fi.

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ho1Aetoo
DD-WRT Guru


Joined: 19 Feb 2019
Posts: 1375
Location: Germany

PostPosted: Sun Nov 21, 2021 12:56    Post subject: Reply with quote
@PavelVD

For me, both work as said and shown.

Code:
root@DD-WRT:/tmp# cat dnsmasq.conf
.........
bogus-priv
conf-file=/etc/rfc6761.conf
dhcp-option=252,"\n"
cache-size=0
dhcp-option=6,192.168.1.110


Last edited by ho1Aetoo on Sun Nov 21, 2021 13:05; edited 1 time in total
PavelVD
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Joined: 26 Jul 2019
Posts: 86

PostPosted: Sun Nov 21, 2021 13:05    Post subject: Reply with quote
O! Please mark this thread as - Solved!
I removed the adapter from the system and rebooted the laptop. After that, the 192.168.1.107 I needed was assigned. Those. Win10 is caching the old value somewhere, rather than trying to request a new one.
Thanks to all!
Embarassed

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kernel-panic69
DD-WRT Guru


Joined: 08 May 2018
Posts: 12619
Location: Texas, USA

PostPosted: Sun Nov 21, 2021 13:11    Post subject: Reply with quote
Glad to hear it was resolved. Windows registry after Windows 98 is the crux of many problems. It retains values for things no longer present. It's the biggest lifesaver and pain in the ass at the same time.
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