Virtual Private Network (VPN) - VPN Connection Drops and You Cannot Connect to Any Websites or Systems on Windows

Problem

After connecting to the F5 VPN it disconnects after a short period of time, or you're unable to connect to any websites, systems, etc. after connecting.

Environment

Windows

Resolution

1. Restart the computer.
2. Check for any sub-standard anti-virus programs, or anti-virus that are not on the approved list of supported programs:
   1. See Acceptable anti-virus/malware programs in What Do I Need Before I Can Use the VPN at MSU (link, KB 36).
   2. Uninstall any incompatible programs and install one that is compatible.
   3. Restart the computer and try again.
3. Disconnect from the VPN and see if sites connect then. If it does not, run the Windows Network Troubleshooting for any possible network issues.
4. Try the following Windows Command Prompt commands:
   • In Windows open Command Prompt, or "cmd", and enter:
     • ipconfig /flushdns
     • Press Enter
     • Restart the computer
   • If after flushing the DNS, and restarting the computer, you're still experiencing the issue try pinging some services On and Off the VPN to compare results:
     • ping 35.8.0.4
     • ping 8.8.8.8
   • For each subsequent ping, and keeping track when disconnected or connected to the VPN, compare the results by looking at the returned time (example: time=52ms) and for which service the time is longer.
5. Reset your Windows Network Stack by following the instructions on https://www.howtogeek.com/265870/how-to-reset-your-entire-network-in-windows-10-and-start-from-scratch/
   Doing this will delete all saved Wi-Fi network names and passwords. Be sure to write these down before performing this step.
6. Run a network speedtest by going to either the "fast.com" or "speedtest.net" websites and noting your download speed, upload speed, and ping.
7. If using a wireless connection, from your computer to your router, try moving closer to the router or using a hardwired connection, like Ethernet, directly from your computer to your router.
8. If the problem persists, please contact the IT Service Desk and be prepared to provide them with notes about what you have done and what the results were so they can assist.

Cause

Unknown