📵 No Server Access on Mobile Internet (“Whitelists”)
If your server is active but access from a smartphone or modem disappears completely — especially while a drone-attack threat is declared in the region — that is the result of enforced security measures. During such periods mobile carriers switch their networks to state “whitelist” mode.
Why it happens
| What the carrier does | What it means for you |
|---|---|
| Passes traffic only to a limited list of essential platforms (Yandex services, VKontakte, Gosuslugi, maps, some banks) | Everything else, including your VPS, is unreachable |
| Blocks technical protocols at the DPI (TSPU) and carrier equipment level | SSH, RDP, WireGuard, VLESS, and any VPN connection stop working |
| Leaves only standard web browsing to approved sites | The VPN app fails to connect and ssh times out |
Why hosting cannot bypass it
- The restrictions are enabled remotely by the carriers under direct orders — hosting support has no influence over cellular towers.
- Adding a personal server's IP address to state exception lists is not possible.
- Changing the protocol, port, or masking domain does not help: the filtering works off an allowed list of destinations, not off traffic type.
What to do
- Switch to wired internet. The restrictions apply to mobile networks only (3G/4G/5G). Home wired connections (FTTB, xDSL) and stationary Wi-Fi keep working normally — VPS access returns immediately.
- Wait for the alert to be lifted. Once the regional threat is cleared, carriers restore normal operation and the connection from your phone comes back automatically.
- Confirm that this is the cause. If the server answers
ssh root@IPfrom a wired connection, the server is fully functional and the restriction is on the mobile network side.
If there are no regional restrictions
When access fails from wired internet too, the cause is different — run through the step-by-step troubleshooting.