There is a specific substring in HTML files that causes a connection reset when serving the request, and it seems to be caused by the Check Point VPN.
I've tested in three different clients' Check Point VPNs, in several browsers (Chrome, Firefox, Edge, Internet Explorer). The file is being hosted on a IIS server. Browsing on the server, the page shows correctly, only when outside the server, when the request must pass through the VPN, does the issue occur. I've tried on different VPNs without any issues.
The minimum HTML file content that causes the problem (the newline is necessary), and yes I know this is not a valid HTML file, this was the least amount of HTML that manages to cause the connection reset.:
<p>{white-space: pre-line;}</p>
X
Here is a valid HTML file that also causes the problem:
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<style type="text/css">
body { white-space: pre-line; }
</style>
</head>
<body>
<h1>HTML test</h1>
</body>
</html>
Has anyone reported a similar issue, or can anyone reproduce the problem please?
Thank you very for your help
