Why we are having problem connecting to all streaming media platforms?

We are having problem conncting streaming media platforms. We are getting dnsft.cloud.zyxel.com errors. We cannot reach youtube, vimeo, vudu, plex, etc.

Accepted Solution

  • Zyxel_Jeff
    Zyxel_Jeff Posts: 1,059  Zyxel Employee
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    Answer ✓

    We found that the root cause is related to the DNS servers' (192.170.X.X) cache. We suggest you clean the DNS servers' cache and can resolve this problem.

    We tried to nslookup youtube via Google DNS server 8.8.8.8 and can be resolved normally, but if nslookup youtube via the DNS server 192.170.X.X would be failed. Thanks.

All Replies

  • Zyxel_Jeff
    Zyxel_Jeff Posts: 1,059  Zyxel Employee
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    Dear @INBK_IT

    It belongs to the Content Filter's certificate. Please check your Content Filter profile whether blocks media-related categories. If so, you can cancel it or add those media websites to the allow list. Thanks.

  • Hi @Zyxel_Jeff

    We did check Content Filter profile. It says blocked by Streaming Media and Media Sharing categories, which we unchecked in both Web and DNS Content Filter. Also, we added Vimeo.com in both side trusted web sites and allow list and it is still not working. please see attached pictures for more details.

  • Zyxel_Jeff
    Zyxel_Jeff Posts: 1,059  Zyxel Employee
    First Anniversary 10 Comments Friend Collector First Answer
    edited October 2023

    Hi @INBK_IT

    It could be related to the cache issue, please perform below steps:

    Step1. Enter the CLI "debug content-filter https-domain-filter cache flush" to flush the Content Filter's cache.

    Step2. Clean the browser's cache and the PC's DNS cache

    Step 3: Use the browser in incognito mode to access the website to see if it's working for you.

    If the issue persists, please reboot your firewall and PC to ensure all caches are completely cleared..

  • @Zyxel_Jeff

    We tried all the steps you told us and we did restarted our Zyxel USG Flex 200 and my computer.

    We still have problem.

  • Carlsap
    Carlsap Posts: 23  ZCNE Certified
    First Anniversary ZCNE Security Level 1 Certification - 2019 ZCNE Nebula Level 1 Certification - 2019 10 Comments

    We have the same problem here on a flex700 device.
    Can we disable the SSL check feature?

  • @Carlsap

    Are you having problem with all streaming media? or are you trying for specific website?

  • @Zyxel_Jeff

    We still have problem. Do you have any other suggestion?

  • Zyxel_Jeff
    Zyxel_Jeff Posts: 1,059  Zyxel Employee
    First Anniversary 10 Comments Friend Collector First Answer

    Dear @INBK_IT

    Could you provide a remote Web-GUI link to us for further checking purposes? I will send a private to you later, please check your inbox. Thanks.

  • Zyxel_Jeff
    Zyxel_Jeff Posts: 1,059  Zyxel Employee
    First Anniversary 10 Comments Friend Collector First Answer
    Answer ✓

    We found that the root cause is related to the DNS servers' (192.170.X.X) cache. We suggest you clean the DNS servers' cache and can resolve this problem.

    We tried to nslookup youtube via Google DNS server 8.8.8.8 and can be resolved normally, but if nslookup youtube via the DNS server 192.170.X.X would be failed. Thanks.

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