118 lines
3.7 KiB
Nix
118 lines
3.7 KiB
Nix
{ config, ... }:
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{
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services = {
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unbound = {
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enable = true;
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localControlSocketPath = "/run/unbound/unbound.ctl";
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settings = {
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server = {
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# Setting logfile to an empty string outputs to stderr
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log-queries = false;
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log-replies = true;
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log-tag-queryreply = true;
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log-local-actions = true;
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logfile = "/var/log/unbound/unbound.log";
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verbosity = 0;
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port = 5335;
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do-ip4 = true;
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do-ip6 = true;
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do-udp = true;
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do-tcp = true;
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prefer-ip6 = true;
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hide-identity = true;
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hide-version = true;
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identity = "Server";
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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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harden-referral-path = true;
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# Don't use Capitalization randomization as it known 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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prefetch-key = true;
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# This attempts to reduce latency by serving the outdated record before
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# updating it instead of the other way around. Alternative is to increase
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# cache-min-ttl to e.g. 3600.
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cache-min-ttl = 300;
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cache-max-ttl = 86400;
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serve-expired = true;
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# Set cache size. rrset-cache-size should be twice what msg-cache-size is
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rrset-cache-size = "256m";
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msg-cache-size = "128m";
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msg-cache-slabs = 4;
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# One thread should be sufficient, can be increased on beefy machines. In reality for most users running on
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# 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 = 2;
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# Leave sections that are not requested out of the response message
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# Reduces response message significantly and may prevent TCP fallback
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# for some responses
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minimal-responses = true;
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# Ensure kernel buffer is large enough to not lose messages in traffic spikes
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so-rcvbuf = "8m";
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so-sndbuf = "8m";
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# Improve UDP performance with multithreading
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so-reuseport = true;
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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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};
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};
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};
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prometheus.exporters = {
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node = {
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enable = true;
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enabledCollectors = [ "systemd" ];
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};
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unbound = {
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enable = true;
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unbound.host = "unix:///run/unbound/unbound.ctl";
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};
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};
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logrotate = {
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settings = {
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unbound = {
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files = [ "/var/log/unbound/unbound.log" ];
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frequency = "daily";
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rotate = 7;
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compress = true;
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delaycompress = true;
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notifempty = true;
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postrotate = ''
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${config.services.unbound.package}/bin/unbound-control log_reopen
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'';
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};
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};
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};
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};
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}
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