addition of new option blocking_mode

[imponateado]

No description provided.

[imponateado]

sorry for not being descriptive

this pull request brings a new option on config file that allows user to choose if crab-hole will answer client with nxdomain (no response) or zero (0.0.0.0 for ipv4 and [::] for ipv6)

[msrd0]

Just out of curiosity, what is your use case?

[imponateado]

you mean, what do I use crab hole for? just as a local dns sinkhole

[msrd0]

No, I mean why you need/prefer a 0.0.0.0 response over nxdomain

[msrd0]

Also, would it make sense to allow for the ip address to be configurable? If one would use crab-hole for a (semi)public DNS, they might want to provide a page that serves an this website was blocked page.

[imponateado]

reason is mostly because how adguard home works, there are benefits:
https://www.reddit.com/r/technitium/comments/1ejxt9u/nxdomain_vs_0000/
https://support.adamnet.works/t/comparing-dns-blocking-methods/1245

and there are cons:
AdguardTeam/AdGuardHome#4738
https://discourse.pi-hole.net/t/doh-canary-domain-returns-0-0-0-0-rather-than-nxdomain-on-pi-hole-5-2-1/41366

[imponateado]

Also, would it make sense to allow for the ip address to be configurable? If one would use crab-hole for a (semi)public DNS, they might want to provide a page that serves an this website was blocked page.

It'd be cool indeed, nextdns implements this afaik