I need help. URL filtering being bypassed
Hello everyone,
We have an ER7206 V1 currently running Omada V5.15.8.2 with URL Filtering activated to block everything that is not on the allowed lists. However, I have noticed that some users can access pages that are not listed. Upon closer observation, I realized that they keep pressing the "F5" key repeatedly until the page loads.
The URL Filtering is divided by category, and within each category, there are several URLs, an average of about 30 URLs per category. If a person does not press the "F5" key multiple times, everything works correctly. What could be the problem? Has anyone faced this issue before?
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Hi @Addsk
Thanks for posting in our business forum.
I tested with an ER7206 V2 and the latest pre-release firmware. I don't see this problem with it. It blocked as expected.
Firefox, the latest version, and Chrome. Desktop on Win11.
Do you have a video for your problem illustration?
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@Clive_A
Here’s the video I just made. As you can see in the video, some websites keep loading and don’t open, but when the website finally gives an error message, if you keep pressing F5 repeatedly, it opens. This has been happening to some users.
1drv.ms/v/c/3fdcaf986871a1ea/EdPizMr5N8dDl2h6F6b-JOEB6oqH6eXzBqQXagUF9wZbqQ?e=EcBpDx
Link onedrive
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Hi @Addsk
Thanks for posting in our business forum.
Addsk wrote
@Clive_A
Here’s the video I just made. As you can see in the video, some websites keep loading and don’t open, but when the website finally gives an error message, if you keep pressing F5 repeatedly, it opens. This has been happening to some users.
1drv.ms/v/c/3fdcaf986871a1ea/EdPizMr5N8dDl2h6F6b-JOEB6oqH6eXzBqQXagUF9wZbqQ?e=EcBpDx
Link onedrive
Did you block all its subdomains?
Like the guide I wrote, you have to block all its domains and sub domains to avoid being loaded.
Some contents are not loaded by "example.com" but by CDN or other domains.
Try to block this and test it.
"google.com" and will you load the google.com by spamming F5?
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I am using the opposite of what was mentioned. I created some categories like Skype, WhatsApp, Google, OpenAI among others with the URLs that are allowed and a blocked category with "." to block everything that is not on the list. But if you do it as shown in the video, sometimes it allows access and I am having difficulty with that.
I have attached a .txt in rar file with the URL Filtering. The current one running is slightly different from this one, but only by a little.
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Hi @Addsk
Addsk wrote
I am using the opposite of what was mentioned. I created some categories like Skype, WhatsApp, Google, OpenAI among others with the URLs that are allowed and a blocked category with "." to block everything that is not on the list. But if you do it as shown in the video, sometimes it allows access and I am having difficulty with that.
I have attached a .txt in rar file with the URL Filtering. The current one running is slightly different from this one, but only by a little.
Then you should mention this in the first description.
Clearly you are not following the guide I wrote.
I tried it what you described. I spammed F5 by pressing it. It freshened like a hundred times and it did not allow it to enter the page once.
I only enabled these two rules.
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Hi @Addsk
Addsk wrote
Hello everyone,
We have an ER7206 V1 currently running Omada V5.15.8.2 with URL Filtering activated to block everything that is not on the allowed lists. However, I have noticed that some users can access pages that are not listed. Upon closer observation, I realized that they keep pressing the "F5" key repeatedly until the page loads.
The URL Filtering is divided by category, and within each category, there are several URLs, an average of about 30 URLs per category. If a person does not press the "F5" key multiple times, everything works correctly. What could be the problem? Has anyone faced this issue before?
Do you still face the issue?
If yes, use Wireshark and capture the packet individually on your WAN and LAN. Would like to monitor the behavior in your case as I don't face the same problem in the last test.
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