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TechnitiumSoftware / DnsServer

Technitium DNS Server
https://technitium.com/dns/
GNU General Public License v3.0
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Resolver exception #803

Closed liang-hiwin closed 5 months ago

liang-hiwin commented 6 months ago 
[
  {
    "name": "r5---sn-i3b7knld.googlevideo.com",
    "type": "A",
    "ttl": "0 (0 sec)",
    "rData": {
      "dataType": "DnsSpecialCacheRecordData",
      "data": "FailureCache: ServerFailure; Other: Resolver exception for r5---sn-i3b7knld.googlevideo.com. A IN: The SSL connection could not be established, see inner exception."
    },
    "dnssecStatus": "Unknown",
    "eDnsClientSubnet": "113.87.50.0/24",
    "lastUsedOn": "0001-01-01T00:00:00"
  },
  {
    "name": "r5---sn-i3b7knld.googlevideo.com",
    "type": "CNAME",
    "ttl": "0 (0 sec)",
    "rData": {
      "cname": "r5.sn-i3b7knld.googlevideo.com"
    },
    "dnssecStatus": "Disabled",
    "eDnsClientSubnet": "0.0.0.0/0",
    "lastUsedOn": "0001-01-01T00:00:00"
  }
]

Is this a problem? FailureCache: ServerFailure; Other: Resolver exception for r5---sn-i3b7knld.googlevideo.com. A IN: The SSL connection could not be established, see inner exception.

ShreyasZare commented 6 months ago

Thanks for the post. This error suggest that you are using encrypted DNS protocol with forwarder and that the connection failed to establish. Any resolution failure gets cached this way and the DNS server will retry only once the failure cache record expires.

liang-hiwin commented 6 months ago

Thanks for the post. This error suggest that you are using encrypted DNS protocol with forwarder and that the connection failed to establish. Any resolution failure gets cached this way and the DNS server will retry only once the failure cache record expires.

The network is normal, why is this prompt displayed?

ShreyasZare commented 6 months ago

The network is normal, why is this prompt displayed?

The error exists because there was some issue with network. A more detailed error log would be available in the DNS logs that will explain the reason in more details. Do check if there are any error logs related to this.

liang-hiwin commented 6 months ago

The network is normal, why is this prompt displayed?

The error exists because there was some issue with network. A more detailed error log would be available in the DNS logs that will explain the reason in more details. Do check if there are any error logs related to this.

There is no network error message in the log.

ShreyasZare commented 6 months ago

There is no network error message in the log.

Check if you have "Ignore Resolver Error Logs" option enabled in Settings > Logging section. This option will prevent from logging such resolver errors.

liang-hiwin commented 6 months ago

There is no network error message in the log.

Check if you have "Ignore Resolver Error Logs" option enabled in Settings > Logging section. This option will prevent from logging such resolver errors.

I have unchecked it, I will post the log again when problems arise.