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For an issue I worked on, the application pool kept stopping with Event ID 2269, 5139, and 5002. The errors and warnings I saw in Event Viewer are below.
Event 2269
The worker process for app pool ‘DefaultAppPool’ failed to initialize the http.s… Continue reading Event ID 2269 (HTTP.SYS communication error)
When you run a penetration test on your web application, the report may point out BREACH as a high-risk vulnerability. BREACH attack works by trying to guess the secret keys in a compressed and encrypted response. Attacker makes many requests and try t… Continue reading BREACH vulnerability
You may come across this error message when you access your website: “Can’t reach this page. There was a temporary DNS error. Error code: INET_E_RESOURCE_NOT_FOUND”
Solution
As the error mentions, there might be a problem with the DNS re… Continue reading INET_E_RESOURCE_NOT_FOUND error
417 status code refers to an issue with the Expect header in the request. The server was probably not able to meet the requirement in this header (RFC7231).
Solution
Collect a Fiddler trace and analyze the header. Do due diligence like probi… Continue reading 417 Expectation Failed error
You may notice that Failed Request Tracing (FREB) rule is not creating log files even though the condition in your rule is met.
Reinstalling the Tracing module normally solves issues related to FREB but this may not be an acceptable approach if Shared … Continue reading Failed Request Tracing is not creating logs
If your website’s address is this:
http://testsite.com/testapp/default.htm
and you want your users to see the URL below in browser address bar (The name “testapp” is stripped out)
http://testsite.com/default.htm
… Continue reading Remove folder/application names from URLs
In the IIS logs, you may come across a specific IP address that is generating a high amount of traffic. If you suspect that this is a malicious activity, you can block the IP address in IIS.
Steps for using IP and Domain Restrictions module to b… Continue reading Block an IP address accessing the application
Workplace collaboration is evolving—and so is Microsoft Word. Today, we’re pleased to announce expanded availability of our new modern commenting experience across Word platforms.
Modern comments sets the stage for a richer Word collaborat… Continue reading Introducing Modern Comments in Microsoft Word