add a module for unbound
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{ ... }:
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{
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services.unbound = {
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enable = true;
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settings = {
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server = {
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verbosity = 0;
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interface = "127.0.0.1";
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port = 5335;
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do-ip4 = true;
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do-udp = true;
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do-tcp = true;
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# May be set to true; if you have IPv6 connectivity
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do-ip6 = false;
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# You want to leave this to false; unless you have *native* IPv6. With 6to4 and
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# Terredo tunnels your web browser should favor IPv4 for the same reasons
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prefer-ip6 = false;
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# Use this only when you downloaded the list of primary root servers!
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# If you use the default dns-root-data package, unbound will find it automatically
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#root-hints: "/var/lib/unbound/root.hints"
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# Trust glue only if it is within the server's authority
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harden-glue = true;
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# Require DNSSEC data for trust-anchored zones, if such data is absent, the zone becomes BOGUS
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harden-dnssec-stripped = true;
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# Don't use Capitalization randomization as it kfalse;wn to cause DNSSEC issues sometimes
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# see https://discourse.pi-hole.net/t/unbound-stubby-or-dnscrypt-proxy/9378 for further details
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use-caps-for-id = false;
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# Reduce EDNS reassembly buffer size.
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# Suggested by the unbound man page to reduce fragmentation reassembly problems
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edns-buffer-size = 1472;
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# Perform prefetching of close to expired message cache entries
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# This only applies to domains that have been frequently queried
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prefetch = true;
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# One thread should be sufficient, can be increased on beefy machines. In reality for most users running on small networks or on a single machine, it should be unnecessary to seek performance enhancement by increasing num-threads above 1.
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num-threads = 1;
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# Ensure kernel buffer is large efalse;ugh to false;t lose messages in traffic spikes
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so-rcvbuf = "1m";
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# Ensure privacy of local IP ranges
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private-address = [
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192.168.0.0/16
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169.254.0.0/16
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172.16.0.0/12
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10.0.0.0/8
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fd00::/8
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fe80::/10
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];
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# Send minimum amount of information to upstream servers to enhance
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# privacy. Only sends minimum required labels of the QNAME and sets
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# QTYPE to NS when possible.
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# See RFC 7816 "DNS Query Name Minimisation to Improve Privacy" for
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# details.
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qname-minimisation = true;
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};
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};
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};
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}
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