System Administration & Network Administration
windows web-server azure-active-directory netstat lenovo
Updated Sat, 03 Sep 2022 01:30:56 GMT

Local webserver with long response time


We have set up a new infrastructure and all our Laptops/PCs have a the same error: When trying to open a website from a local webserver, it takes between 10 and 30 seconds. During this time it does not even start to load the site.

Setup

  • Lenovo T Series Notebooks (might be relevant since Lenovo has its own security software)
  • Windows 10
  • All notebooks are administered via Microsoft Azure AD with standard settings

Things we've tried so far

  • It doesn't matter if the server gets called via 127.0.0.1 or localhost.
  • It also does not matter which port it is.
  • We have deactivated Antivirus, Firewall and Smartscreen. No success.
  • It occurs with every website content and webserver (we have tried Apache, Node apps and others). Even with a simple line of code.

Analysis

  • Ping on localhost and 127.0.0.1 is successful with < 1ms
  • etc/hosts file has no entries
  • Netstat is showing the following. For instance, if we are using the standard port 80, it has several entries:
  • 127.0.0.1:80 - 0.0.0.0:0 - Listening
  • 127.0.0.1:80 - 127.0.0.1:50503 - Established
  • 127.0.0.1:50503 - 127.0.0.1:80 - Established
  • Looks like a loop. Is there something wrong?

What we suspect

  • It might be routing issue
  • It might be a security issue (we deactivated a lot of things as described above, but there might be something else?)

Ideas and and any help is appreciated. Thank you very much.




Solution

Problem got solved

Our laptops got an Windows Update approximately a week after and the problem was randomly solved for everyone. Windows Updates were activated from the beginning so I'm really not sure what has caused the error and what solved it.

Maybe there were some dependencies in the updates and they got slowly rolled out and one of the last updates fixed the system.

This answer might not be satisfying but it is gone.