DNS 0 NOERROR vs 18 BADTIME
Both DNS 0 (NOERROR) and 18 (BADTIME) belong to the DNS Response Codes (RCODEs) category. 0 indicates that no error condition. The query completed successfully and the response contains the requested data. Meanwhile, 18 means that signature out of time window. The TSIG signature timestamp is outside the allowed clock skew, indicating a time synchronization issue.
विवरण
No error condition. The query completed successfully and the response contains the requested data.
जब आप इसे देखें
This is the normal, successful response to any DNS query — the name was resolved and the answer section contains the requested records.
कैसे ठीक करें
No fix needed. RCODE 0 means the DNS lookup succeeded as expected.
विवरण
Signature out of time window. The TSIG signature timestamp is outside the allowed clock skew, indicating a time synchronization issue.
जब आप इसे देखें
The clocks on the DNS client and server are too far apart (usually more than 5 minutes), causing TSIG signature validation to fail.
कैसे ठीक करें
Synchronize clocks on both machines using NTP. Check that the TSIG fudge value (allowed skew) is reasonable — the default 300 seconds is usually sufficient.
मुख्य अंतर
DNS 0: No error condition. The query completed successfully and the response contains the requested data.
DNS 18: Signature out of time window. The TSIG signature timestamp is outside the allowed clock skew, indicating a time synchronization issue.
You encounter 0 when this is the normal, successful response to any DNS query — the name was resolved and the answer section contains the requested records.
You encounter 18 when the clocks on the DNS client and server are too far apart (usually more than 5 minutes), causing TSIG signature validation to fail.
कब किसका उपयोग करें
For 0 (NOERROR): No fix needed. RCODE 0 means the DNS lookup succeeded as expected. For 18 (BADTIME): Synchronize clocks on both machines using NTP. Check that the TSIG fudge value (allowed skew) is reasonable — the default 300 seconds is usually sufficient.