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If SSH or an application is unreachable, first check service status and whether the VPS is running. A failed ping alone does not prove the server is offline.

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Open the console

  1. Open your VPS under Services → My Services in the VPS Management Portal.
  2. Click Start VNC, then Open Console.
  3. Log in to Linux. The console remains useful even when networking inside the VPS is misconfigured.
See VNC access for details.

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Check the interface and assigned settings

Compare the interface, addresses, prefix lengths, and gateway with Network Info in the portal. Use your own assigned values, not values from a screenshot. For IPv6, follow the IPv6 troubleshooting guide.

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Separate routing from DNS problems

Replace YOUR_GATEWAY with the gateway shown in Network Info:
  • An IP test working while name resolution fails points toward a resolver problem.
  • A nonresponsive gateway may simply filter ICMP; compare multiple tests and actual application connectivity.
  • If the interface lacks its assigned address or default route, inspect its persistent network configuration.

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Check the affected service and firewall

For SSH on Debian or Ubuntu:
On distributions such as RHEL, the service is usually named sshd. If socket activation is configured, also inspect ssh.socket. In the listener output, check the actual port and address on which SSH or your application is listening. If you use UFW:
Correct the specific rule that blocks the required service. See Ports, firewalls and connectivity.

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Apply the right network fix

Network management varies by installation. Do not assume systemctl restart networking applies to every Linux system. For Ubuntu using Netplan, follow Change IP on Ubuntu, including backup, validation, and netplan try. If Linux cannot boot, continue with the rescue CD guide.

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What to send support

Include the service identifier, source and destination IPs, time and timezone of the failure, exact error, and relevant command output. Remove passwords and private keys. Explain whether VNC works and whether the failure affects one service or all connectivity. Stop VNC after troubleshooting.
Last modified on September 30, 2026