A company I am servicing has a Domain Controller Name called
internal.example.com and whenever their employees go home, Apache is flooded by wpad.dat request. This flood of requests are redirected to 404, this overwhelms apache and it bogs down.
There is a wildcard DNS entry for *.example.com to be redirected to the main website.
These are the things I already did:
Served a wpad.dat file in the root directory of their website. Apache stops bogging down when I started serving a static file.
Added DNS entries for
After adding the DNS and letting it propagate, I can still see requests on my log files.
I don't know what domain they are trying to access. The log file is referring to the main website instead of what they are trying to access.
Here are the applications that are requesting the wpad.dat file
- Microsoft Office 2014
- Kaspersky Proxy-Server detection agent
This thread is related Being flooded by wpad.dat but there is no conclusive answer how to fix or at least block requests.
EDIT: I don't know what subdomain they are trying to access and apache reporting it is coming from the main website. The entries I added to the DNS are intelligent guesses, I don't have concrete proof on what they are accessing.