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[Q] Router DNS question (lem.ainyataovi.net)

submitted 2 years ago by [email protected] to c/selfhosted

7 comments fedilink hide all child comments

Hi, I'm trying to figure out how to set up a service like pi-hole and one of the prerequisits seems to be to have admin access to the router to make the correct DNS entries.

Unfortunately, the router provided by my ISP doesn't grant me access to these settings - is there a way around that, and what would it involve? I do have a hybdrid router (DSL + LTE connection), that's (according to my ISP) the reason DNS settings are locked.

Any ideas are welcome :)

all 8 comments

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[–] smokedclover 5 points 2 years ago

I think you have to change the DNS settings on every client/connection then

[–] Mickpyro 3 points 2 years ago (1 children)

Can't we setup dns adresses in dhcpd? Yes we can! https://manpages.org/dhcpd/8 (After BOOTP support)

[–] vegetaaaaaaa 1 points 2 years ago (2 children)

If OP's router is so basic that they can't change DNS server addresses, there are chances they can't disable the builtin dhcp server either. 2 DHCP servers on the same network will not end well.

I think the only way is to manually set DNS servers on each client.

[–] [email protected] 2 points 2 years ago

FWIW, my ISP router didn't allow custom DNS, but it allows disabling DHCP altogether.
I just run DHCP in pihole too, which works fine.

[–] Mickpyro 0 points 2 years ago

If you read the link, you will understand that you can decide for every network interface a personnalize DNS. Not simply a DNS to the whole network, or by machine. Also, 99.99% sure that any modem router box combo can disable the DHCP and act as a bridge.

Note: the question I wrote was a guenuine one, and not sarcasm.

[–] [email protected] 1 points 2 years ago

Pihole + bind for lookups. Doesn't matter what your ISP provided device uses if you are overriding it. That, and use DNS over TLS/HTTPS and you should be good.

Pihole + Bind

Setting up a router behind your ISP equipment might end up breaking stuff due to double NAT, but may still work for you if you are just surfing the web. At least you can control your ACLs.