Question

  • Creator
    Topic
  • #4164255

    How do I fix DNS queries overload problem?

    by safnah ·

    Dear All Experts

    I’m facing a big problem in DNS queries recently it happens two times daily i guess with over 700 dns queries and it used to be even more like 1300 in just single second , it seems as some sort of sophisticated DNS DDOS attack or something , any tips or ways to help and avoid such ones.

    problem shown in photo below.

    https://snipboard.io/5MRVK3.jpg

You are posting a reply to: How do I fix DNS queries overload problem?

The posting of advertisements, profanity, or personal attacks is prohibited. Please refer to our Community FAQs for details. All submitted content is subject to our Terms of Use.

All Answers

  • Author
    Replies
    • #4164296
      Avatar photo

      The usual fix is

      by rproffitt ·

      In reply to How do I fix DNS queries overload problem?

      To use a RATE LIMITER on the DNS (server.) This is well discussed on the web but I won’t be able to help you since I don’t see the details about your server.

      Example: https://medium.com/nlnetlabs/dns-response-rate-limiting-as-implemented-in-nsd-60249dba83d5

      Yes, that’s from 2012. I use this example because limiting response rates has been around for decades.

    • #4171885

      You can consider implementing various measures.

      by GracePerkins ·

      In reply to How do I fix DNS queries overload problem?

      First, configure your DNS server to handle a higher volume of queries efficiently. Optimize your DNS cache settings to minimize the strain on your server. Employ rate limiting or traffic filtering mechanisms to thwart potential DDoS attacks.

      Additionally, consider using a reputable DNS service provider or a DNS protection solution that offers DDoS mitigation capabilities. Regularly monitor your network traffic for abnormal patterns and set up alerts to be notified of any unusual surges in DNS queries. Collaborate with your ISP to explore any traffic filtering or rerouting options that could help alleviate the overload.

    • #4210363

      Reply To: How do I fix DNS queries overload problem?

      by shafiumuhammadubale ·

      In reply to How do I fix DNS queries overload problem?

      “Dealing with a sudden surge in DNS queries can be challenging. It’s crucial to address this issue promptly to ensure the stability and security of your network.
      First, I’d recommend checking your network for any potential security vulnerabilities. Make sure your firewall is properly configured to handle DNS traffic and consider implementing intrusion detection systems.
      Additionally, monitor your DNS server logs to identify any patterns or suspicious activity. This can help you pinpoint the source of the increased queries.

      Note: commercial link removed by moderator.

      • This reply was modified 4 months, 2 weeks ago by shafiumuhammadubale.
      • This reply was modified 4 months, 2 weeks ago by Avatar photokees_b.
    • #4215008

      How do I fix DNS queries problem?

      by asifmalik29601 ·

      In reply to How do I fix DNS queries overload problem?

      Based on your given data and screenshot, its not a DDoS attack (if you’re using a cloudflare service). Best way to fix this problem, Go to cloudflare account > firewall > security and change the security level to high or under attack (then monitor the performance).

      Make sure your proxy settings are enabled from the DNS (orange) on all the records!

      Note: If you see your site running fine, you can ignore these stats / and contact your hosting provider to resolve this issue.

Viewing 3 reply threads