A red exclamation mark appears on the right side of the IP address. How to solve it?

A red exclamation mark next to an IP address typically indicates a problem with the network connection, configuration, or status of that IP. Common causes include:

1. Network Connectivity Issues: The device with the IP may be offline or unreachable.

   • Solution: Check physical connections (cables, Wi-Fi), restart the device, or verify network settings.

2. IP Conflict: Another device on the same network might be using the same IP.

   • Solution: Use arp -a (Windows) or arp -an (Linux/macOS) to detect conflicts. Assign a static IP or enable DHCP to resolve.

3. Firewall/Security Blocking: The IP might be blocked by a firewall or security group.

   • Solution: Check firewall rules (e.g., Windows Defender Firewall, Linux iptables) or cloud security groups (if applicable).

4. Cloud/Server Issue: If the IP belongs to a cloud-hosted service, the instance might be down or misconfigured.

   • Solution: Use Tencent Cloud's Cloud Monitor to check the instance status. Restart the instance via the console if needed.

5. DNS/Resolution Problem: The IP might not resolve correctly for services.

   • Solution: Verify DNS settings or use nslookup/dig to test resolution.

Example: If the IP is for a web server and the exclamation mark appears, check:

• Server logs for errors.
• Load balancer or reverse proxy configurations (e.g., Nginx, Apache).
• Tencent Cloud's CLB (Load Balancer) settings if traffic is routed through it.

For cloud environments, ensure the instance is running and network interfaces are properly configured in the Tencent Cloud Console.