Common Network Problem

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May 25, 2024 7:44 AM

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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.

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