Originally created by @NeverSayd1e on GitHub (Apr 5, 2023). Original GitHub issue: https://github.com/fatedier/frp/issues/3388 ### Bug Description TCP正常，但是UDP不能正常建链 ### frpc Version 0.20 ### frps Version 0.33 ### System Architecture koolshare merlin ### Configurations #frps configuration: [common] bind_addr = 0.0.0.0 bind_port = 7000 bind_udp_port = 7001 kcp_bind_port = 7000 vhost_http_port = 80 vhost_https_port = 443 dashboard_addr = 0.0.0.0 dashboard_port = 7500 dashboard_user = admin dashboard_pwd = admin log_file = ./frps.log log_level = info log_max_days = 3 disable_log_color = false token = xxxx max_pool_count = 5 max_ports_per_client = 0 subdomain_host = frps.com tcp_mux = true # frpc configuration: [common] server_addr = xxxx server_port = 7000 token = xxxx log_file = /tmp/frpc.log log_level = info log_max_days = 3 tcp_mux = true protocol = tcp login_fail_exit = false user = admin_dl [ssh1] type = tcp local_ip = 192.168.3.81 local_port = 8090 remote_port = 54032 use_encryption = true use_compression = true [frpc_tcp] type = tcp local_ip = 192.168.3.81 local_port = 9999 remote_port = 54033 use_encryption = true use_compression = true [frpc_udp] type = udp local_ip = 192.168.3.81 local_port = 8888 remote_port = 54034 use_encryption = true use_compression = true ### Logs #FRPS log: 2023/04/05 20:32:25 [I] [udp.go:84] [1dbbbc0b25c38a2a] [admin_dl.frpc_udp] udp proxy listen port [54034] 2023/04/05 20:32:25 [I] [control.go:446] [1dbbbc0b25c38a2a] new proxy [admin_dl.frpc_udp] success 2023/04/05 20:32:25 [I] [tcp.go:63] [1dbbbc0b25c38a2a] [admin_dl.ssh1] tcp proxy listen port [54032] 2023/04/05 20:32:25 [I] [control.go:446] [1dbbbc0b25c38a2a] new proxy [admin_dl.ssh1] success 2023/04/05 20:32:25 [I] [tcp.go:63] [1dbbbc0b25c38a2a] [admin_dl.frpc_tcp] tcp proxy listen port [54033] 2023/04/05 20:32:25 [I] [control.go:446] [1dbbbc0b25c38a2a] new proxy [admin_dl.frpc_tcp] success 2023/04/05 20:32:25 [I] [proxy.go:103] [1dbbbc0b25c38a2a] [admin_dl.frpc_udp] get a new work connection: [60.21.100.130:54559] 2023/04/05 20:33:25 [W] [udp.go:102] [1dbbbc0b25c38a2a] [admin_dl.frpc_udp] read from workConn for udp error: i/o deadline reached 2023/04/05 20:33:25 [I] [proxy.go:103] [1dbbbc0b25c38a2a] [admin_dl.frpc_udp] get a new work connection: [60.21.100.130:54559] 2023/04/05 20:33:25 [I] [udp.go:157] [1dbbbc0b25c38a2a] [admin_dl.frpc_udp] sender goroutine for udp work connection closed 2023/04/05 20:34:25 [W] [udp.go:102] [1dbbbc0b25c38a2a] [admin_dl.frpc_udp] read from workConn for udp error: i/o deadline reached 2023/04/05 20:34:25 [I] [proxy.go:103] [1dbbbc0b25c38a2a] [admin_dl.frpc_udp] get a new work connection: [60.21.100.130:54559] 2023/04/05 20:34:25 [I] [udp.go:157] [1dbbbc0b25c38a2a] [admin_dl.frpc_udp] sender goroutine for udp work connection closed #FRPC LOG 2023/04/05 20:01:58 [I] [proxy.go:350] [admin_dl.frpc_udp] incoming a new work connection for udp proxy, 221.214.170.113:7000 2023/04/05 20:01:58 [W] [proxy.go:365] [admin_dl.frpc_udp] read from workConn for udp error: EOF 2023/04/05 20:01:58 [I] [proxy.go:379] [admin_dl.frpc_udp] writer goroutine for udp work connection closed 2023/04/05 20:02:58 [I] [proxy.go:350] [admin_dl.frpc_udp] incoming a new work connection for udp proxy, 221.214.170.113:7000 2023/04/05 20:02:58 [W] [proxy.go:365] [admin_dl.frpc_udp] read from workConn for udp error: EOF 2023/04/05 20:02:58 [I] [proxy.go:379] [admin_dl.frpc_udp] writer goroutine for udp work connection closed ### Steps to reproduce 1. 创建FRPS，版本0.33 2. 创建FRPC，版本0.20 3. 创建UDP连接 ... ### Affected area - [ ] Docs - [ ] Installation - [ ] Performance and Scalability - [ ] Security - [X] User Experience - [ ] Test and Release - [ ] Developer Infrastructure - [ ] Client Plugin - [ ] Server Plugin - [ ] Extensions - [ ] Others

gitea-mirror commented

2026-05-05 13:44:52 -06:00

Owner

Originally created by @NeverSayd1e on GitHub (Apr 5, 2023).
Original GitHub issue: https://github.com/fatedier/frp/issues/3388

Bug Description

TCP正常，但是UDP不能正常建链

frpc Version

0.20

frps Version

0.33

System Architecture

koolshare merlin

Configurations

#frps configuration:
[common]
bind_addr = 0.0.0.0
bind_port = 7000
bind_udp_port = 7001
kcp_bind_port = 7000
vhost_http_port = 80
vhost_https_port = 443
dashboard_addr = 0.0.0.0
dashboard_port = 7500
dashboard_user = admin
dashboard_pwd = admin
log_file = ./frps.log
log_level = info
log_max_days = 3
disable_log_color = false
token = xxxx
max_pool_count = 5
max_ports_per_client = 0
subdomain_host = frps.com
tcp_mux = true

frpc configuration:

[common]
server_addr = xxxx
server_port = 7000
token = xxxx
log_file = /tmp/frpc.log
log_level = info
log_max_days = 3
tcp_mux = true
protocol = tcp
login_fail_exit = false
user = admin_dl
[ssh1]
type = tcp
local_ip = 192.168.3.81
local_port = 8090
remote_port = 54032
use_encryption = true
use_compression = true
[frpc_tcp]
type = tcp
local_ip = 192.168.3.81
local_port = 9999
remote_port = 54033
use_encryption = true
use_compression = true
[frpc_udp]
type = udp
local_ip = 192.168.3.81
local_port = 8888
remote_port = 54034
use_encryption = true
use_compression = true

Logs

#FRPS log:
2023/04/05 20:32:25 [I] [udp.go:84] [1dbbbc0b25c38a2a] [admin_dl.frpc_udp] udp proxy listen port [54034]
2023/04/05 20:32:25 [I] [control.go:446] [1dbbbc0b25c38a2a] new proxy [admin_dl.frpc_udp] success
2023/04/05 20:32:25 [I] [tcp.go:63] [1dbbbc0b25c38a2a] [admin_dl.ssh1] tcp proxy listen port [54032]
2023/04/05 20:32:25 [I] [control.go:446] [1dbbbc0b25c38a2a] new proxy [admin_dl.ssh1] success
2023/04/05 20:32:25 [I] [tcp.go:63] [1dbbbc0b25c38a2a] [admin_dl.frpc_tcp] tcp proxy listen port [54033]
2023/04/05 20:32:25 [I] [control.go:446] [1dbbbc0b25c38a2a] new proxy [admin_dl.frpc_tcp] success
2023/04/05 20:32:25 [I] [proxy.go:103] [1dbbbc0b25c38a2a] [admin_dl.frpc_udp] get a new work connection: [60.21.100.130:54559]

2023/04/05 20:33:25 [W] [udp.go:102] [1dbbbc0b25c38a2a] [admin_dl.frpc_udp] read from workConn for udp error: i/o deadline reached
2023/04/05 20:33:25 [I] [proxy.go:103] [1dbbbc0b25c38a2a] [admin_dl.frpc_udp] get a new work connection: [60.21.100.130:54559]
2023/04/05 20:33:25 [I] [udp.go:157] [1dbbbc0b25c38a2a] [admin_dl.frpc_udp] sender goroutine for udp work connection closed

2023/04/05 20:34:25 [W] [udp.go:102] [1dbbbc0b25c38a2a] [admin_dl.frpc_udp] read from workConn for udp error: i/o deadline reached
2023/04/05 20:34:25 [I] [proxy.go:103] [1dbbbc0b25c38a2a] [admin_dl.frpc_udp] get a new work connection: [60.21.100.130:54559]
2023/04/05 20:34:25 [I] [udp.go:157] [1dbbbc0b25c38a2a] [admin_dl.frpc_udp] sender goroutine for udp work connection closed

#FRPC LOG
2023/04/05 20:01:58 [I] [proxy.go:350] [admin_dl.frpc_udp] incoming a new work connection for udp proxy, 221.214.170.113:7000
2023/04/05 20:01:58 [W] [proxy.go:365] [admin_dl.frpc_udp] read from workConn for udp error: EOF
2023/04/05 20:01:58 [I] [proxy.go:379] [admin_dl.frpc_udp] writer goroutine for udp work connection closed
2023/04/05 20:02:58 [I] [proxy.go:350] [admin_dl.frpc_udp] incoming a new work connection for udp proxy, 221.214.170.113:7000
2023/04/05 20:02:58 [W] [proxy.go:365] [admin_dl.frpc_udp] read from workConn for udp error: EOF
2023/04/05 20:02:58 [I] [proxy.go:379] [admin_dl.frpc_udp] writer goroutine for udp work connection closed

Steps to reproduce

创建FRPS，版本0.33
创建FRPC，版本0.20
创建UDP连接
...

Affected area

Docs
Installation
Performance and Scalability
Security
User Experience
Test and Release
Developer Infrastructure
Client Plugin
Server Plugin
Extensions
Others

gitea-mirror

closed this issue
added the
lifecycle/stale
label

2026-05-05 13:44:55 -06:00

Author

@Becods commented on GitHub (Apr 5, 2023):

更新frp

检查服务器是否开放 udp 端口

@Becods commented on GitHub (Apr 5, 2023): 更新frp 检查服务器是否开放 udp 端口

2026-05-05 13:44:56 -06:00

@github-actions[bot] commented on GitHub (May 6, 2023):

Issues go stale after 30d of inactivity. Stale issues rot after an additional 7d of inactivity and eventually close.

@github-actions[bot] commented on GitHub (May 6, 2023): Issues go stale after 30d of inactivity. Stale issues rot after an additional 7d of inactivity and eventually close.

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[GH-ISSUE #3388] TCP正常，但是UDP不能正常建链 #2711