Common Network Problem

Ngày đăng

May 25, 2024 7:44 AM

Nguồn

DevOps Shack

Tác giả

Quân Huỳnh

1. Connection Refused: Occurs when the server actively rejects a connection request.
• Cause: The service might not be running or configured properly.
• Solution: Verify the service status and configuration files.
2. Connection Timed Out: Indicates that the connection attempt took too long to complete.
• Cause: Firewall settings, network congestion, or unresponsive server.
• Solution: Check firewall rules, network configurations, and server responsiveness.
3. No Route to Host: Indicates the inability to reach the destination host.
• Cause: Incorrect routing table or network misconfiguration.
• Solution: Check routing tables using route or ip route commands.
4. Host Unreachable: Similar to "No Route to Host," signifies the inability to reach the destination.
• Cause: Network misconfiguration or incorrect IP address.
• Solution: Verify IP configuration and network settings.
5. Destination Host Unreachable: Indicates that the destination host is unreachable.
• Cause: Network misconfiguration, incorrect IP address, or server down.
• Solution: Check destination host's status and network settings.
6. Network is Unreachable: Suggests that the network is unreachable.
• Cause: Network interface down or misconfigured.
• Solution: Check network interface status (ifconfig or ip addr) and configurations.
7. Name or Service not known: Occurs when the hostname cannot be resolved to an IP address.
• Cause: DNS resolution failure or incorrect hostname.
• Solution: Verify DNS settings (/etc/resolv.conf) and hostname configuration.
8. Socket Operation on Non-Socket: Indicates an attempt to perform a socket operation on a file or directory.
• Cause: Incorrect file type used in a socket operation.
• Solution: Check the file type and ensure it's a socket.
9. Permission Denied: Occurs when the user doesn't have the necessary permissions.
• Cause: Insufficient permissions to access network resources.
• Solution: Adjust permissions using chmod or chown commands.
10. Socket Bind Failed: Indicates failure to bind a socket to an address and port.
• Cause: Another process may be using the same port, or insufficient privileges.
• Solution: Choose a different port or ensure proper permissions.
11. Network is Down: Indicates that the network interface is down.
• Cause: Network interface disabled or physical connection issue.
• Solution: Enable the network interface (ifconfig interface up or ip link set interface up).
12. Connection Reset by Peer: Occurs when the remote host unexpectedly closes the connection.
• Cause: Server-side issue or network interruption.
• Solution: Check server logs for errors and network stability.
13. Connection Aborted: Indicates that the connection was terminated abruptly.
• Cause: Network congestion, timeout, or firewall rules.
• Solution: Check network conditions and firewall settings.
14. Connection Closed: Signifies that the connection was gracefully closed by the remote host.
• Cause: Normal termination or server-side closure.
• Solution: No action required if closure is expected.
15. Invalid Argument: Occurs when an invalid argument is passed to a system call.
• Cause: Programming error or misconfiguration.
• Solution: Review the code or configuration for errors.
16. Operation Not Permitted: Indicates that the operation is not permitted.
• Cause: Insufficient permissions or security restrictions.
• Solution: Ensure proper permissions and review security settings.
17. Resource Temporarily Unavailable: Occurs when a resource is temporarily unavailable.
• Cause: Resource exhaustion or temporary system issue.
• Solution: Wait for the resource to become available or investigate system status.
18. Connection Already in Progress: Indicates that another connection attempt is in progress.
• Cause: Concurrent connection attempts.
• Solution: Wait for the ongoing connection attempt to complete.
19. Too Many Open Files: Occurs when the process reaches its file descriptor limit.
• Cause: Resource exhaustion or misconfigured limits.
• Solution: Increase the file descriptor limit or optimize resource usage.
20. Operation Timed Out: Signifies that the operation took longer than expected.
• Cause: Network congestion, server overload, or misconfigured timeouts.
• Solution: Adjust timeout settings or investigate network/server performance.
21. Protocol not Supported: Indicates that the requested protocol is not supported.
• Cause: Protocol mismatch or unsupported operation.
• Solution: Use a supported protocol or update software if necessary.
22. Address Already in Use: Occurs when trying to bind a socket to an address already in use.
• Cause: Another process is already using the same address.
• Solution: Choose a different address or terminate the conflicting process.
23. Network Unreachable: Suggests that the network is unreachable.
• Cause: Routing issues or misconfigured network settings.
• Solution: Check routing tables and network configurations.
24. Transport Endpoint is not Connected: Indicates that the socket is not connected.
• Cause: Attempting to use a socket that is not connected.
• Solution: Ensure proper socket connection before performing operations.
25. Connection Reset: Signifies that the connection was reset by the peer.
• Cause: Network issues or misbehaving applications.
• Solution: Investigate network stability and application behavior.
26. Operation would Block: Indicates that the operation would block the process.
• Cause: Non-blocking I/O operation on a resource.
• Solution: Adjust I/O settings or handle non-blocking operations appropriately.
27. Protocol Family not Supported: Occurs when the requested protocol family is not supported.
• Cause: Unsupported protocol family or misconfiguration.
• Solution: Use a supported protocol family or update configurations.
28. No Buffer Space Available: Indicates insufficient buffer space available.
• Cause: Resource exhaustion or misconfigured buffer sizes.
• Solution: Increase buffer sizes or optimize resource usage.
29. Network Down: Similar to "Network is Down," suggests that the network is down.
• Cause: Network interface disabled or physical connection issue.
• Solution: Enable the network interface (ifconfig interface up or ip link set interface up).
30. Interrupted System Call: Occurs when a system call is interrupted by a signal.
• Cause: Signal interruption during system call execution.
• Solution: Handle signals appropriately or retry interrupted operations.
31. Connection Refused: Indicates that the connection request was rejected.
• Cause: Service not available or firewall rules.
• Solution: Verify service availability and firewall configurations.
32. Connection Refused: Indicates that the connection request was rejected.
• Cause: Service not available or firewall rules.
• Solution: Verify service availability and firewall configurations.
33. Too Many References: Occurs when there are too many references to a resource.
• Cause: Resource leakage or mismanagement.
• Solution: Identify and fix resource leaks in the application.
34. Operation Already in Progress: Indicates that the operation is already in progress.
• Cause: Concurrent operation attempts.
• Solution: Ensure proper synchronization or wait for the ongoing operation to complete.
35. Connection Dropped: Signifies that the connection was dropped unexpectedly.
• Cause: Network issues or misbehaving applications.
• Solution: Investigate network stability and application behavior.
36. Connection Aborted by Peer: Similar to "Connection Aborted," indicates peer-initiated connection abortion.
• Cause: Peer or server-side issues.
• Solution: Investigate server logs and peer behavior.
37. Network Reset: Occurs when the network is reset.
• Cause: Network issues or reset commands.
• Solution: Investigate network stability and reset commands.
38. Operation Cancelled: Indicates that the operation was cancelled.
• Cause: User or application-initiated cancellation.
• Solution: Retry the operation if necessary.
39. Connection Terminated: Signifies that the connection was terminated.
• Cause: Normal or abnormal termination.
• Solution: Investigate the reason for termination.
40. Invalid Socket: Occurs when using an invalid socket descriptor.
• Cause: Incorrect socket descriptor or resource deallocation.
• Solution: Ensure proper socket management and error handling.
41. Network Reset by Peer: Indicates that the peer reset the network connection.
• Cause: Peer or server-side issues.
• Solution: Investigate server logs and peer behavior.
42. Message Too Long: Occurs when the message length exceeds the maximum allowed.
• Cause: Message length exceeds protocol limits.
• Solution: Adjust message size or protocol configurations.
43. Address Family not Supported: Indicates that the requested address family is not supported.
• Cause: Unsupported address family or misconfiguration.
• Solution: Use a supported address family or update configurations.
44. Invalid Argument: Occurs when an invalid argument is passed to a function.
• Cause: Incorrect argument passed to a function call.
• Solution: Review function call and argument types.
45. Host Down: Indicates that the host is down or unreachable.
• Cause: Server or host-side issues.
• Solution: Check host status and network connectivity.
46. Socket Operation on Non-Socket: Occurs when attempting socket operations on non-socket objects.
• Cause: Incorrect object type used in socket operations.
• Solution: Use proper socket objects for socket operations.
47. Operation Not Supported: Indicates that the operation is not supported.
• Cause: Unsupported operation or system limitation.
• Solution: Use supported operations or update system configurations.
48. Resource Busy: Signifies that the requested resource is busy.
• Cause: Resource contention or concurrent access.
• Solution: Retry the operation after the resource becomes available.
49. Socket Type not Supported: Occurs when the requested socket type is not supported.
• Cause: Unsupported socket type or misconfiguration.
• Solution: Use supported socket types or adjust configurations.
50. Too Many Links: Indicates that there are too many links to the resource.
• Cause: Excessive linking or mismanagement.
• Solution: Review resource links and manage them appropriately.
51. Protocol Error: Signifies a protocol-related error.
• Cause: Protocol violation or misinterpretation.
• Solution: Ensure compliance with protocol specifications and standards.

Nếu bài viết có gì sai hoặc cần cập nhật thì liên hệ Admin.

Tham gia nhóm chat của DevOps VN tại Telegram.

Kém tiếng Anh và cần nâng cao trình độ giao tiếp: Tại sao bạn học không hiệu quả?