Overview
The VPN connects fine in the office or on a phone hotspot, but from home it hangs on “Connecting…”, times out, or fails with an authentication error.
Likely cause
- The home router is blocking VPN traffic, or has no VPN passthrough.
- Expired credentials, or an MFA prompt that was never approved.
- Double NAT — a modem and a separate router both handing out addresses.
- The home network uses the same IP range as the office (very common with 192.168.1.x).
- Antivirus or firewall software intercepting the connection.
Before you begin
- Your VPN username, password and the server address.
- Your phone, for MFA approval.
- A phone hotspot to test with — the fastest way to prove it's the home network.
Step-by-step
Step 1 — Test on a phone hotspot
Connect the laptop to your phone's hotspot and try the VPN. If it works, the home router or ISP is the problem. If it still fails, the issue is the laptop or the VPN account.
Step 2 — Restart everything, in order
Restart the laptop, then power-cycle the home router: unplug it for 60 seconds, plug it back in, and wait two minutes for it to come fully online.
Step 3 — Re-enter credentials and approve MFA
Type the password rather than relying on saved credentials, and watch the phone for a push notification. An unapproved prompt looks exactly like a timeout.
Step 4 — Check basic connectivity to the VPN server
From Command Prompt, using your VPN server address:
ping vpn.example.comTest-NetConnection vpn.example.com -Port 443A failure here means traffic isn't leaving the home network — continue to Step 5.
Step 5 — Look for an IP range conflict
Check the home network's address range:
ipconfigIf the home network uses the same subnet as the office (for example both on 192.168.1.x), the VPN will connect but nothing will be reachable, or it will fail outright. Change the home router's LAN range to something distinctive such as 192.168.50.x.
Step 6 — Temporarily disable third-party security software
Only disable security software briefly, while testing, and turn it straight back on.
Never leave a machine unprotected on a home network.
Third-party firewalls and “web shield” features frequently block VPN tunnels. If disabling one fixes it, add a permanent exclusion instead of leaving it off.
Step 7 — Reinstall the VPN client
Uninstall the client, restart, then install the current version supplied by your IT provider and re-import the profile.
Quick resolution order
CYBER904 quick resolution order
- Test on a phone hotspot to isolate the home network.
- Restart laptop and router.
- Re-enter credentials and approve MFA.
- Test reachability to the VPN server.
- Check for an office/home IP range conflict.
- Test with third-party security software briefly disabled.
- Reinstall the VPN client and profile.
Expected result
The VPN connects within about 30 seconds and office file shares, printers and line-of-business applications open normally.
Troubleshooting
Still stuck?
If you'd rather not work through this yourself, CYBER904 can take it from here. Reach the team directly during business hours and we'll get it sorted.