What is the most common reason a VPN is not working?

The most common easy-to-isolate causes are a broken base internet connection, one unavailable server, or a protocol the current network blocks. Test normal internet first, switch to a nearby server, and then change the protocol before reinstalling anything.

Why will my VPN not connect when the internet works?

If websites load with the VPN off, the problem is more likely inside the VPN path: an unavailable server, blocked protocol or port, outdated app, firewall rule, incorrect device clock, login problem, or account device limit. Try another server and protocol first.

Why is my VPN connected but there is no internet?

The tunnel may be established while DNS, a route, a kill-switch rule, a captive portal, or the selected server blocks traffic. Switch server, disconnect through the app, return custom DNS and split tunneling to default for one test, and complete any Wi-Fi sign-in page.

Why does my VPN work on mobile data but not Wi-Fi?

That result points to the Wi-Fi network. It may require a captive-portal login, block UDP, restrict VPN ports, or enforce a work or school policy. Complete the login page, then try automatic, Smart, Stealth, OpenVPN TCP, or a provider-supported WireGuard TCP mode.

Why is my VPN not working on my phone?

Check that mobile data or Wi-Fi works without the VPN, set date and time automatically, allow the VPN to run in the background, and review Always-on VPN or block-without-VPN settings. Then switch server and protocol before removing the VPN profile.

Why does one website not work with my VPN?

The website may reject the shared exit IP, see an old location cookie, detect a DNS or region mismatch, or restrict VPN use. Try another server and a private window. A working tunnel cannot guarantee that every destination will accept its IP address.

Why does my VPN keep disconnecting?

Common causes include weak base internet, a distant or overloaded server, a mismatched protocol, device power saving, another VPN app, or an account device limit. Use a close server, allow background activity, and try WireGuard or OpenVPN TCP depending on the network.

Why is my VPN so slow?

A distant server, congestion, weak Wi-Fi, protocol overhead, or a slow base connection can reduce speed. Record a no-VPN baseline, use a nearby server, select WireGuard, and repeat on the same device. Do not compare different routes and blame only the protocol.

How do I restart my VPN correctly?

Disconnect inside the VPN app, fully quit the app, reopen it, and connect to a nearby server. On a phone, remove it from recent apps only after disconnecting. If a kill switch is active, using the app’s disconnect control helps it remove temporary network rules cleanly.

When should I switch to another VPN?

Consider switching when updated software fails across several servers, protocols, and at least two independent networks, while ordinary internet access works. If failure occurs on only one Wi-Fi network, solve that network or transport issue before paying for another subscription.

Guide

14 min readJul 30, 2026

Why Is My VPN Not Working? Diagnose and Fix It in Order

Separate a failed tunnel from connected-with-no-internet, one-network blocks, site rejection, drops, and slow speeds—then use the shortest safe fix.

Quick answer

First turn the VPN off and confirm ordinary internet access works. Then try a different nearby server, switch protocols, fully restart and update the app, and remove another VPN or proxy conflict. If it says Connected but pages fail, reset custom DNS and reconnect so kill-switch routes are rebuilt. If it works on mobile data but not Wi-Fi, that network is probably blocking UDP or waiting for a sign-in page. Diagnose the symptom below; if every server still fails on multiple networks, Proton VPN is our first replacement choice.

Diagnose my VPN Try Proton VPN

Symptom-first troubleshooting

A VPN that will not connect is not the same problem as a VPN that says “Connected” while websites fail. Start with the exact symptom below. That prevents a DNS or kill-switch issue from turning into an unnecessary reinstall.

Check zero

Test without the VPN

If ordinary internet access is already broken, the VPN has no working path to use. Fix Wi-Fi, cellular, the router, or the ISP first.

Fastest VPN-side fix

Change one server

A server can be full, down, or badly routed. Try another nearby server before changing security settings.

If one network fails

Change the protocol

WireGuard UDP may be blocked. Try automatic/Smart mode, OpenVPN TCP, WireGuard TCP, or Stealth where supported.

Interactive VPN diagnosis

Why is my VPN not working?

Choose what you can see right now. The result separates the likely fault from the next action.

Likely diagnosis

The tunnel is not forming

The usual causes are a broken base connection, one unavailable server, a blocked protocol, wrong credentials, an incorrect clock, or a security tool blocking the app.

1Confirm a website loads with the VPN off.
2Choose another nearby server.
3Switch WireGuard ↔ OpenVPN, or use the app’s automatic/Stealth mode.
4Update the app and set date and time automatically.

Decision point: If every server fails on both Wi-Fi and mobile data, check the provider status and account before changing router settings.

How to fix a VPN that is not working

Run these checks in order. Mark each completed step so you do not repeat random changes.

0 of 5 checks marked complete.

Match the fix to the exact failure

VPN connected but no internet

Rebuild DNS, routes, and kill-switch rules

Switch server first. Then disconnect inside the app, return custom DNS and split tunneling to default, and reconnect. Reinstall only if a stale network filter keeps returning.

VPN not connecting on Wi-Fi

Complete the portal, then change transport

Sign in to public Wi-Fi without the VPN, reconnect, and try a TCP or Stealth transport. If cellular works, the local network is the leading suspect.

Internet works only with VPN on

Check a stuck kill switch or DNS rule

Exit through the app instead of force-quitting it. On a trusted network, temporarily test with the kill switch off, then reset or reinstall the app if normal internet returns.

Do not change router settings

Reset the password, verify the subscription, device limit, and automatic date/time, then check the provider’s official status before reinstalling.

VPN keeps disconnecting

Remove power and app conflicts

Allow background activity, exclude the VPN from battery optimization, close other VPNs, and use a closer server. A kill switch can make each drop look like a full internet outage.

VPN is slow

Use the same route for the comparison

Record a no-VPN baseline, pick a nearby server, use WireGuard, and repeat. Do not compare a distant OpenVPN server with a nearby WireGuard server.

When the current VPN is the problem

If every basic fix fails, start with Proton VPN

Switch providers only after the VPN fails across multiple servers and networks. If it fails on one Wi-Fi network but works on mobile data, the network—not the subscription—is the stronger suspect.

First choice

Proton VPN

Start here when protocol blocks are the likely cause. Smart Protocol can select a working transport, while WireGuard TCP and Stealth are available on supported apps.

Try Proton VPN

Second choice

PureVPN

PureVPN is the next comparison when you want automatic fallback plus manual WireGuard, UDP, and TCP protocol choices on supported apps.

Check PureVPN

Third choice

Private Internet Access

PIA is the third option when you value direct WireGuard/OpenVPN selection and more exposed OpenVPN controls for troubleshooting a difficult network.

Check PIA

Platform checks that are safe to verify

Use operating-system documentation for the final settings path. Do not leave the firewall or antivirus disabled after a test.

Windows VPN settingsReview the active profile, proxy state, network adapter, clock, and firewall allow-list.macOS VPN settingsCheck the active VPN configuration and remove only profiles you recognize and no longer use.Android VPN helpVerify Always-on VPN, block-without-VPN behavior, and the active app before changing network settings.

Stop and ask the right owner in these cases

• A work VPN error names a certificate, company gateway, or managed policy: contact your IT team.
• Every device loses ordinary internet access: check the router or ISP, not the VPN app.
• One site rejects every VPN server: the destination controls access; do not assume the tunnel is broken.
• VPN use is restricted by a network or local rules: follow the applicable policy and law.

VPN not working FAQ

Related VPN guides

Proton VPN not workingUse provider-specific checks for Smart Protocol, Kill Switch, login, and P2P errors.NordVPN not connectingDiagnose NordLynx, OpenVPN, Threat Protection, and adapter conflicts.Router VPN setupSeparate client mode, server mode, firmware support, and whole-home routing.OpenVPN vs WireGuardChoose the protocol that fits speed, mobile, router, or blocked-network use.

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