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[GH-ISSUE #4411] connect to server error: i/o deadline reached #3484
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Reference: github-starred/frp#3484
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Originally created by @Anhelor on GitHub (Aug 30, 2024).
Original GitHub issue: https://github.com/fatedier/frp/issues/4411
Bug Description
frps在公网服务器正常运行，但是frpc报错
frpc Version
0.60
frps Version
0.60
System Architecture
linux/amd64
Configurations
frps.toml
bindPort = 12345
frpc.toml
serverAddr = "........"
serverPort = 12345
proxies
name = "ssh"
type = "tcp"
localIP = "127.0.0.1"
localPort = 22
remotePort = 12346
Logs
$ ./frpc -c ./frpc.toml
2024-08-30 09:57:51.921 [I] [sub/root.go:142] start frpc service for config file [./frpc.toml]
2024-08-30 09:57:51.921 [I] [client/service.go:295] try to connect to server...
2024-08-30 09:58:01.938 [W] [client/service.go:298] connect to server error: i/o deadline reached
2024-08-30 09:58:01.938 [I] [sub/root.go:160] frpc service for config file [./frpc.toml] stopped
login to the server failed: i/o deadline reached. With loginFailExit enabled, no additional retries will be attempted
Steps to reproduce
...
Affected area
@DaPoHou commented on GitHub (Sep 27, 2024):
之前稳定运行几年了，我这两天也突然遇到同样问题，版本是0.36.2
重启frps后即恢复正常。过几个小时又会出现同样问题。
`
2024/09/27 14:49:46 [W] [http.go:92] do http proxy request error: context canceled
2024/09/27 14:49:49 [W] [http.go:92] do http proxy request error: context canceled
2024/09/27 14:49:49 [W] [http.go:92] do http proxy request error: context canceled
2024/09/27 14:49:51 [W] [http.go:92] do http proxy request error: context canceled
2024/09/27 14:49:55 [I] [service.go:449] [fc287f2fb11624be] client login info: ip [122.193.31.130:6905] version [0.36.2] hostname [] os [linux] arch [amd64]
2024/09/27 14:49:55 [I] [control.go:283] [fc287f2fb11624be] Replaced by client [fc287f2fb11624be]
2024/09/27 14:50:11 [W] [http.go:92] do http proxy request error: context canceled
2024/09/27 14:50:22 [W] [http.go:92] do http proxy request error: context canceled
2024/09/27 14:50:25 [I] [service.go:449] [fc287f2fb11624be] client login info: ip [122.193.31.130:7426] version [0.36.2] hostname [] os [linux] arch [amd64]
2024/09/27 14:50:25 [I] [control.go:283] [fc287f2fb11624be] Replaced by client [fc287f2fb11624be]
2024/09/27 14:50:30 [W] [http.go:92] do http proxy request error: context canceled
2024/09/27 14:50:31 [W] [http.go:92] do http proxy request error: context canceled
2024/09/27 14:50:32 [W] [http.go:92] do http proxy request error: context canceled
2024/09/27 14:50:41 [W] [http.go:92] do http proxy request error: context canceled
2024/09/27 14:50:42 [W] [http.go:92] do http proxy request error: context canceled
2024/09/27 14:50:42 [W] [http.go:92] do http proxy request error: context canceled
2024/09/27 14:50:48 [W] [http.go:92] do http proxy request error: context canceled
2024/09/27 14:50:52 [W] [http.go:92] do http proxy request error: context canceled
`
frpc.log
`
2024/09/27 14:49:56 [I] [service.go:177] [fc287f2fb11624be] try to reconnect to server...
2024/09/27 14:50:06 [W] [service.go:180] [fc287f2fb11624be] reconnect to server error: i/o deadline reached
2024/09/27 14:50:26 [I] [service.go:177] [fc287f2fb11624be] try to reconnect to server...
2024/09/27 14:50:36 [W] [service.go:180] [fc287f2fb11624be] reconnect to server error: i/o deadline reached
2024/09/27 14:50:56 [I] [service.go:177] [fc287f2fb11624be] try to reconnect to server...
`
@dannyxu2015 commented on GitHub (Feb 24, 2025):
@Anhelor 面临一样的问题，你解决了吗？
我的问题可能更复杂一些，一些客户端是正常的，只有一台新安装的Ubuntu 22.04的服务器出现你说的问题，但是用ngrok是没有问题的
@dannyxu2015 commented on GitHub (Feb 25, 2025):
我的问题昨天刚解决了，tcp的frp会被运营商阻断（例如校园网），可以采用Quic配置解决，需要服务器的安全组开通相应的UDP端口
@Anhelor commented on GitHub (Feb 25, 2025):
我也是用quic解决了
@chenjl12 commented on GitHub (Dec 4, 2025):
你好，我也遇到此问题。方便提供一下Quic配置吗？目前我在服务端中加了quicBindPort = 7000，客户端transport.protocol = "quic"，proxies type = "udp"。仍然出现这个问题
@dannyxu2015 commented on GitHub (Dec 4, 2025):
客户端的 type="tcp" 试试吧
@guiguisocute commented on GitHub (Jan 12, 2026):
感谢，我就说为什么好了一个月突然就全崩了，校园网为什么对内网穿透这么敏感，各种远程软件全杀光，明明梯子和小鸡都没限制这么狠