Before troubleshooting anything, it helps to confirm the basics. A surprising number of issues come from something simple like a wrong IP address, a missing gateway, or a DNS server that is not reachable.

Quick checklist

• Check the local IP address.
• Confirm the default gateway.
• Test DNS resolution.
• Verify that the destination is reachable with ping.

Keep it structured

If you ask the same four questions every time, you will usually find the problem faster.