今天為2020年1月1日。

為何用 DNS 8.8.8.8, 8.8.4.4 無法解釋 ithome.com.tw 域名 IP?

這個問題已經出現一個月了

我現在要用 DNS 1.1.1.1 才能正常運作。(用自建的DNS Server也正常)

有誰知道發生什麼事嗎？

香港寬頻 (Windows 10)

nslookup ithome.com.tw 8.8.8.8
伺服器:  dns.google
Address:  8.8.8.8

DNS request timed out.
    timeout was 2 seconds.
DNS request timed out.
    timeout was 2 seconds.
DNS request timed out.
    timeout was 2 seconds.
DNS request timed out.
    timeout was 2 seconds.
*** 對 dns.google 的要求逾時

和記電訊 (Linux)

nslookup ithome.com.tw 8.8.8.8
Server:         8.8.8.8
Address:        8.8.8.8#53

** server can't find ithome.com.tw: SERVFAIL

中國移動 (Windows 7)

nslookup ithome.com.tw 8.8.8.8
伺服器:  dns.google
Address:  8.8.8.8

DNS request timed out.
    timeout was 2 seconds.
DNS request timed out.
    timeout was 2 seconds.
DNS request timed out.
    timeout was 2 seconds.
DNS request timed out.
    timeout was 2 seconds.
*** 對 dns.google 的要求逾時

Traceroute Report

https://dns.google.com/

Result for ithome.com.tw/A with DNSSEC validation:
{
  "Status": 2,
  "TC": false,
  "RD": true,
  "RA": true,
  "AD": false,
  "CD": false,
  "Question": [
    {
      "name": "ithome.com.tw.",
      "type": 1
    }
  ],
  "Comment": "Name servers did not respond [220.130.119.129, 210.59.230.252]."
}

在上面的訊息顯示，"Name servers did not respond" <- 名稱服務器未響應
正常的話，應該是 "Comment": "Response from [220.130.119.129, 210.59.230.252]."

以下一個正常例子：

{
  "Status": 0,
  "TC": false,
  "RD": true,
  "RA": true,
  "AD": false,
  "CD": false,
  "Question": [
    {
      "name": "tophk.net.",
      "type": 1
    }
  ],
  "Answer": [
    {
      "name": "tophk.net.",
      "type": 1,
      "TTL": 299,
      "data": "210.3.122.66"
    }
  ],
  "Comment": "Response from 173.245.59.83."
}