[GH-ISSUE #178] [Resolver] Promote to TCP on truncated responses #83

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opened 2026-03-07 22:18:39 +03:00 by kerem · 1 comment

kerem commented

2026-03-07 22:18:39 +03:00

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Originally created by @bluejekyll on GitHub (Aug 22, 2017).
Original GitHub issue: https://github.com/hickory-dns/hickory-dns/issues/178

Some upstream resolvers/servers will respond with truncation specified if a dns packet is larger than 512 bytes. The resolver should be configured to switch to TCP in these cases. This requires adding some logic to limit the request to TCP only nameservers from the NameServerPool.

Originally created by @bluejekyll on GitHub (Aug 22, 2017). Original GitHub issue: https://github.com/hickory-dns/hickory-dns/issues/178 Some upstream resolvers/servers will respond with truncation specified if a dns packet is larger than 512 bytes. The resolver should be configured to switch to TCP in these cases. This requires adding some logic to limit the request to TCP only nameservers from the NameServerPool.