ETIMEDOUT networking network_error ai_generated true

TFTP：等待来自192.168.1.100:69的数据包超时

TFTP: timeout waiting for data packet from 192.168.1.100:69

ID: networking/tftp-timeout-no-response

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78%修复率
82%置信度
1证据数
2023-07-22首次发现

版本兼容性

版本状态引入弃用备注
tftp-hpa 5.2 active — — —
Cisco IOS 15.9 active — — —
Linux tftp client 0.17 active — — —

根因分析

TFTP客户端向服务器发送了读/写请求，但在超时时间内未收到数据包，通常由防火墙阻止UDP 69端口、文件路径错误或服务器过载引起。

English

A TFTP client sent a read/write request to the server but received no data packet within the timeout period, typically due to firewall blocking UDP port 69, incorrect file path, or server overload.

generic

官方文档

https://linux.die.net/man/1/tftp

解决方案

  1. Check server connectivity with `tftp 192.168.1.100 -c get /path/to/file` and verify the server is running: `systemctl status tftpd-hpa`
  2. Allow TFTP traffic through the firewall: `iptables -A INPUT -p udp --dport 69 -j ACCEPT` and ensure the TFTP server is not bound to localhost only.
  3. Test with a known good file in the server's root directory (e.g., /srv/tftp) to rule out permission issues: `chmod 644 /srv/tftp/test.txt`

无效尝试

常见但无效的做法:

  1. 75% 失败

    If the firewall is blocking the port or the file does not exist, no amount of waiting will help; the request will still fail after the extended timeout.

  2. 60% 失败

    The client implementation is rarely the issue; the problem is almost always server-side or network-layer.

  3. 50% 失败

    This is a security risk and may not solve the problem if the server's firewall is the blocker; also, it does not verify the server is running.