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this post was submitted on 15 Nov 2023
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Does this just use an upstream dns server or can it do recursive resolution like unbound? Does it cache results?
If you mean CNAME flattening I have an issue for it. If you mean recursively resolving CNAME until the end record is found, it does support it.
For example, if you set a custom record
mygoogle.lol IN CNAME google.comLeng will return a response with an A record with agoogle.comIP address when you visitmygoogle.lolI’m basically just wondering if I can replace my blocky+unbound setup with just leng!
I think the answer is yes (as leng is recursive) but can you explain your use-case and expected behaviour a bit so I can get a better idea of what you want unbound to do that blocky is not doing?
I think it does caching because grimd does caching. I want a dns filter and dns resolver that's selfhosted but still performant and low latency. Caching of course is big part of that because if you're running recursive queries every time, your ping will be like 100-200ms.
Leng will cache each step of recursion, and it relies on upstream resolvers to do recursion for it as well (like grimd), so you should not be seeing 200ms resolution in any scenario.
I am keen for you to give it a shot - if you do please make an issue if it's not behaving like you were hoping for
Ahh interesting. So do you have to manually set an upstream dns server?
Correct, and much like grimd you can specify several. But unlike grimd, leng will perform recursion when the upstream server is not capable of resolving queries completely (namely, because a CNAME resolved by upstream somewhere points to a domain that is part of your custom DNS records, or vice versa)