Windows 10: DNS Cache Suspicious Entries

Discus and support DNS Cache Suspicious Entries in Windows 10 Network and Sharing to solve the problem; Hello, I have a DNS entry which never goes away even after flushing it multiple times and restarting the machine. I would like to know if there is a... Discussion in 'Windows 10 Network and Sharing' started by Gaurav2020, May 24, 2020.

  1. GAURAV2020
    Gaurav2020 Win User

    DNS Cache Suspicious Entries


    Hello, I have a DNS entry which never goes away even after flushing it multiple times and restarting the machine. I would like to know if there is a way to identify which program/application is constantly trying to access the network so that I can remove this suspicious access. Before flushing the DNS, I read through the entries, all are genuine such as Microsoft Store, Edge and Google entries which have valid host records. The one in the below image 'cracksmind.com' looks odd and host record 0.0.0.0 is making me worried.

    Kindly find below the screenshot of the DNS entries:


    DNS Cache Suspicious Entries 5092e6d6-3481-4feb-8d3f-df51002d31be?upload=true.jpg

    :)
     
    Gaurav2020, May 24, 2020
    #1
  2. LEONLAUDE
    LeonLaude Win User

    DNS SERVER NOT RESONDING

    Hi Rita French,

    This issue often occurs when the DNS settings are incorrect. I suggest you to perform the following methods to troubleshoot the issue.

    Method 1:

    I would recommend you to change the Preferred DNS server and check if it helps.

    • Press Windows + R keys to open Run window, type
      ncpa.cpl and press Enter.
    • Right-click on the connection that you use for the local connection, and then click
      Properties.
    • Click to select Internet Protocol Version 4 (TCP/IPv4), and then click
      Properties.
    • In the Internet Protocol window, let's change the Preferred DNS server to
      208.67.222.222
    • Click OK twice to complete the modification.

    Note: If the issue persists, please repeat the steps and change the "Preferred DNS server" to 208.67.220.220.

    Method 2:

    If that does not help, try to flush the DNS. Follow these steps below.

    • From Start screen, type Command Prompt.
    • Right-click on Command Prompt and choose Run as Administrator.
    • Type: ipconfig /flushdns and press Enter.

    Note: The ipconfig /flushdns command provides you with a means to flush and reset the contents of the DNS client resolver cache. During DNS troubleshooting, if necessary, you can use this procedure to discard negative cache entries from the cache, as well
    as, any other dynamically added entries.

    Hope any of these methods help!

    Kind regards,

    Leon
     
    LeonLaude, May 24, 2020
    #2
  3. COUNTFRACKULA
    CountFrackula Win User
    Reset Cached DNS in Windows 10

    I recently set up an AD server that is also now my DNS server. Everything worked fine with my Windows 7 machines. I pointed my router to the new DNS server and everything worked like it should after disconnecting and reconnecting to the network.

    Unfortunately, Windows 10 is hanging on to old DNS entries and I just get this:

    IPv4 DNS Server: 8.8.8.8

    8.8.4.4

    192.168.1.1

    My Windows XP/7 machines got the DNS update with zero issues after refreshing their IP.

    All of the machines are set to automatically get the DNS server from the router.

    This is what I've tried.

    • Release/renew IP.
    • Flushdns/Renewdns.
    • Disabling/enabling adapters.
    • Deleting and reinstalling adapters.
    • Performing a Winsock reset.
    • Removing cached networks from my registry and rebooting.
    • Resetting my network from the network config.
    • Rebooting literally everything.
    Nothing works. It still hangs on to those old DNS servers. Short of chunking my router and
    forcing it to get a new DNS (from a new MAC address), I'm not sure what's left.
     
    CountFrackula, May 24, 2020
    #3
  4. COLINFABER
    ColinFaber Win User

    DNS Cache Suspicious Entries

    Windows 10 DNS caching problem

    After some time of messing around with the two windows 10 machines I have, one a laptop, the other a surface pro 4, I've consistently hit the DNS resolution issues that many other people have reported.

    Basically what happens is DNS resolution stops functioning for a period of time, however previously cached domains still resolve. A simple and effective solution to this is to just flush dns cache with ipconfig /flushdns command. More frustrating is that
    it appears when DNS resolution fails, nxdomain is cached as well (which may actually be a significant part of the problem).

    Microsoft network engineering should take a good look at how the resolver cache is handled, as it appears that some failure which results in DNS resolution failure will end up with a cached nxdomain (which should never happen). The fact that a simple dns
    flush fixes the problem instantly strongly suggests that there is a bug in this part of the code which needs closer examination.
     
    ColinFaber, May 24, 2020
    #4
Thema:

DNS Cache Suspicious Entries

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