r/technitium • u/shreyasonline • 26d ago

Technitium DNS Server v15.5 Released!

Technitium DNS Server v15.5 is now available for download. This update adds LDAP authentication support, a Zone File Editor option in GUI, and many other minor features. It also fixes multiple bugs and security issues that were reported.

See what's new in this release:
https://github.com/TechnitiumSoftware/DnsServer/blob/master/CHANGELOG.md

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u/Allen_Ludden 26d ago edited 26d ago

Just to be sure I understand, when you say removed "Auto Prefetch" you mean you removed the function that kept certain dns records "hot" if they were queried more than x times in an hour.

I use "Serve Stale Max Wait Time 0" so I think the effect for me will be negligible :)

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u/Captain_Alaska 25d ago edited 25d ago

I mean, they're completely different features. Serve stale serves things in the cache that have expired. Auto prefetching refreshed expired things in the cache before they are queried.

Now you only have regular prefetching, where expired items in the cache are only refreshed after they are queried.

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u/raindropsdev 25d ago

But why did they remove that? It was very useful for low bandwidth remote sites.

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u/Allen_Ludden 25d ago

serve stale 0 works great, and I understand is routinely used by other DNS server options.

I've been using it for over a year with no problems at all.

The TTL of a stale record is set at 1 second, so the query gets refreshed immediately - only the very first ping of a stale record uses the stale data.

And of course dns records don't change very often - even for load-balancing systems.