Server Configuration Denying IE4 User-Agent On Older Platforms like Windows 98

This is an interesting issue I’ve been encountering for some time. I like to play around with Operating Systems, especially Windows & Linux, and what I like to do when setting up the Virtual Machine and everything else, is to go to my website to test and see if the connection does work (if it’s up). So I visit my link http://nurky.rf.gd/testinternet which just displays a message:

But on the Windows 98, the story is different. Instead of the text being showed that I wrote, I get a 403 Forbidden error instead:

I don’t think this is something to do with .htaccess either, if it did It would’ve displayed my own designed error document instead, which looks like this:

What is the cause of this? Thanks.

Cause of security reasons, probably. Kinda connected with https://infinityfree.net/support/what-is-the-i-1-suffix/

Why: security system checks request, if it has valid cookies and other things like that, maybe such an old browser and OS just does not match with requirements and it being blocked, like an automated bots and servers.

@MrJunior said:
Cause of security reasons, probably. Kinda connected with https://infinityfree.net/support/what-is-the-i-1-suffix/

Why: security system checks request, if it has valid cookies and other things like that, maybe such an old browser and OS just does not match with requirements and it being blocked, like an automated bots and servers.

Oh I understand what you’re saying. So it’s for security reasons then.

Thanks for the information. I Appreciate your time ?

I don’t think the IE4 user agent is being blocked. No user agent blocking is done (especially for legitimate browsers and operating systems). The browser detection system uses Javascript and cookies. I believe IE4 supports both of them, but I wouldn’t be surprised the code breaks on such an ancient system.

If that’s the case, we’re not going to fix it. Windows 98 and Internet Explorer 4 should not be used outside of a museum, and if they are used, they should never be connected to the internet. Those softwares are so outdated and insecure that publishing your credit card details on a public Facebook post is probably safer.