The destination server did not accept the connection request.
I can't connect to the development server or the service on a specific port.
Make sure the address and port are correct.
If it is checked and resolved from above, you do not need to proceed to the next step.
I can't connect to the development server or the service on a specific port.
Difficulty Easy · Estimated time 5 minutes
Check points: Record the error code, when it occurred, and any recent changes.
The destination server did not accept the connection request.
Difficulty Moderate · Estimated time 10~30 minutes
Check points: Make sure the service is responding on the correct port.
When troubleshooting a computer that suddenly fails to connect to the Internet, it is important to rule out the causes one at a time. Based on the “No Internet” symptom, check the router/modem or ISP problem and the network adapter/IP/DNS settings, then proceed to the next step. Compare with other devices and wired connections to narrow down where the problem occurs: PC, router, or ISP.
Among Internet problems, the “Wi-Fi connected but no Internet” symptom may be related to the router’s Internet line or DHCP/DNS problems. Check the wireless adapter status, saved profiles, router/signal quality, and driver in order.
Content review date: 2026-10-07