22
DNS
22 BADTRUNC
Bad truncation. The TSIG record was truncated in a way that makes it impossible to verify the message signature.
Quand vous voyez ce code
A large DNS response was truncated (TC bit set) but the TSIG MAC was computed over the full message, making the truncated version unverifiable.
Comment résoudre
Retry the query over TCP to avoid truncation. If using UDP, ensure your EDNS buffer size is large enough to receive the full signed response.
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Guides
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HTTP Fundamentals
Step-by-Step DNS Troubleshooting with dig and nslookup
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Improving Email Deliverability: SPF, DKIM, and DMARC Setup
Email Delivery
DNS Response Codes (RCODEs) Explained
DNS & Networking
DNS TTL: How to Set TTL Values and Avoid Propagation Delays
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DNS Propagation: Why Changes Take Time
DNS & Networking
DNSSEC Implementation Guide
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DNS-Based Failover and High Availability
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DNS Record Types Explained: A, AAAA, CNAME, MX, TXT, and Beyond
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DNS over HTTPS (DoH) and DNS over TLS (DoT): Encrypted DNS Explained
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Essential Network Debugging Tools: ping, traceroute, mtr, and tcpdump
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RFC 9114: HTTP/3 Protocol Deep Dive
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RFC 3261: SIP Protocol Deep Dive
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QUIC Protocol: The Transport Layer Behind HTTP/3
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Migrating from TLS 1.2 to TLS 1.3: Configuration and Compatibility
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