Right now many VPN services have stopped working properly for users: in many cases this is linked to a vulnerability affecting TUN mode — the virtual network interface through which the client brings the tunnel up. After the issue was disclosed, developers and platforms have to change their stacks and ship updates; outdated clients or incompatible configurations often stop connecting reliably, which creates the feeling that VPNs "suddenly broke for everyone."
Unfortunately, many providers offer no way to test whether the service works before you buy a full plan, which makes choosing one especially hard right now. We do — get full access for 10 rubles; if you find the service is not for you, you can cancel the subscription right away in your account.
Step 1: Local network and internet without VPN
First make sure the internet works without VPN:
- Websites and messengers load with VPN off.
- Other devices on the same Wi‑Fi behave the same way — if not, the cause is more likely the router or ISP.
- On mobile data the picture differs — then Wi‑Fi or its settings (DNS, filters) are suspect.
If the internet is already unstable without VPN, VPN will only make it worse.
Step 2: VPN client, version, and permissions
Outdated connection apps (clients) often break login:
- Update the app from the official source.
- On a PC, check whether the built-in or third-party firewall blocks the connection; you may need to explicitly allow the VPN app outbound connections.
- On a smartphone, make sure the client has permissions for the VPN profile (Android) or configuration (iOS).
After updating, restarting the client and switching server/region once is a reasonable minimum before "heavy artillery."
Step 3: Antivirus, another VPN, and corporate policies
Two VPNs at once are a common cause of failures:
- Briefly test with the other VPN or traffic filter disabled.
- Antivirus products and their network modules conflict with tunnels; more detail — VPN and antivirus.
- On a work laptop, MDM policy may forbid third-party VPNs — that is not fixed by changing servers.
Step 4: The VPN service side
Sometimes the problem is not on your end:
- Mass reports on the service status page, outage at a specific datacenter.
- New blocking methods on the ISP side.
It is worth checking official status/support and your account.
Step 5: Protocol, port, and DPI evasion
On filtered networks the "classic" protocol may be cut while another still works:
- Try an alternative in settings (OpenVPN, IKEv2, WireGuard, etc., if the service offers it).
- Enable modes like obfuscation / "stealth" if your VPN provider has them — they are meant for tough filters.
- Switch UDP/TCP or port if the UI allows it.
When to reset expectations
Even a good VPN does not guarantee access 24/7 on every network in the world: heavy filtering, legal requirements, and technical outages change the conditions. If stability does not return after the steps above, long-term limits on the route to the servers you chose are possible — then switching VPN provider, trying another protocol, or coordinating with a network administrator (in legitimate scenarios) can help.
Structured troubleshooting separates a temporary glitch from a systemic limit and saves you from endlessly hopping countries without knowing where the chain breaks.