Custom DNS for Different VLANs/Interface

Installing and Using OpenWrt Network and Wireless Configuration
1

Good day,

I have this situation where i need to create 4 VLANS with 4 interface

VLAN 10 - adults
VLAN 20 - kids
VLAN 30 - others/guest( to be turned on if guest is present)

what i wanted to do is assign different DNS servers for each vlan/interface
vlan10 - antiphising dns
vlan20 - kidsafe dns/opendns
vlan30- google dns/cloudflare dns

I also already untick Use DNS servers advertised by peer on the WAN interface

and placed the DNS ip address on use custom DNS server per interface,
at first i thought it was working but when i created the other interfaces ( referring to Kids interface/vlan20 and guest interface/vlan30)
they are using the DNS for adults interface/VLAN10

can someone point me to the right direction,
im stil not very good at openwrt and if possible i wanted to use LuCi to configure, if not, please guide me. Thank you

2

You need to advertise the respective nameserver to the hosts with dhcp. Otherwise you'd have to create multiple dnsmasq instances.

Remove these

you can let that as it was.

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3

Where can i find it buddy

Referring to " advertise respective nameserver hosts"

4

You mentioned it already:

so I suppose you know them already.

5

Hi @midnextlevel
Within the interface definition on the dhcp server page there is a subpage Advanced settings with dhcp-options. Here you can advertise the dns servers, as it is already mentioned below the input fields:
6, 192.168.2.1 would advertise dns server 192.168.2.1 to the clients

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6

Sorry to tell you but im confused with the syntax , what does "6," stands for? Thanks for the response

7

6 stands for dns. You can google dhcp-option list, you find for example:

https://www.iana.org/assignments/bootp-dhcp-parameters/bootp-dhcp-parameters.xhtml

or

You can even apply these options per mac address, so within the same interface you can use different dns servers for different devices. I do that for our ebook-readers tolino, as the ebook downloads are somehow interfering with pihole.

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8

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