16
DNS
16 BADVERS/BADSIG
Bad OPT Version or TSIG Signature Failure. Either the EDNS version in the OPT record is not supported, or the TSIG signature on the message failed verification.
이 코드를 보게 되는 경우
As BADVERS: your client sent an EDNS version higher than the server supports. As BADSIG: the TSIG MAC on the message did not match, indicating a shared-secret mismatch or message tampering.
해결 방법
For BADVERS, downgrade the EDNS version (most servers support version 0 only). For BADSIG, regenerate and re-synchronize the TSIG shared secret on both endpoints.
비교 대상
가이드
HTTP Request Lifecycle: From URL to Response
HTTP Fundamentals
Step-by-Step DNS Troubleshooting with dig and nslookup
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Improving Email Deliverability: SPF, DKIM, and DMARC Setup
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DNS Response Codes (RCODEs) Explained
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DNS Propagation: Why Changes Take Time
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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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