DNS
22 BADTRUNC
Bad truncation. The TSIG record was truncated in a way that makes it impossible to verify the message signature.
このコードが表示された場合
A large DNS response was truncated (TC bit set) but the TSIG MAC was computed over the full message, making the truncated version unverifiable.
修正方法
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.