本次介绍使用 frp 实现内网穿透，文章是之前写的，写了很多篇，后续会一一整理出来，希望帮助到有需要的朋友。

frp简介

在某些时候，我们需要远程访问某个内网的资源或服务，但是内网设备通常是无法被外部访问的，内网穿透技术就是解决这种问题。

frp是开源的内网穿透工具，轻量、容易配置，而且支持多种协议（如 http、https、tcp、udp等），并且支持多种认证方式。

frp github 中文文档：https://github.com/fatedier/frp/blob/master/README_zh.md

release 下载：https://github.com/fatedier/frp/releases

注：服务器端和客户端下载的版本要保持一致。

本次下载的版本是【v0.31.2】：https://github.com/fatedier/frp/releases/tag/v0.31.2

本次演示的是通过 frp 内网穿透，在远程连接一台windows电脑。

一、部署

frp由两部分组成：

• frps（服务器端）：运行在具有公网 IP 的服务器上
• frpc（客户端）：运行在内网设备上

本次部署的服务端是阿里云的一台 CentOS 云服务器，客户机就是本地一台 windows。

1.1 服务端部署

本次下载的文件是【frp_0.31.2_linux_amd64.tar.gz】，frps.ini 是启动的配置文件：

[common]
bind_port = 7000

因为用到了服务器默认是 7000 端口，需要在防火墙中开启，如果是云服务器则只需要在安全组的入站方向增加一个端口即可。
由于下面客户端配置的端口是 6000 ，因此一起加上：

下载并运行服务端程序：

# 将文件上传到服务器

# 解压压缩包
tar -zxvf frp_0.31.2_linux_amd64.tar.gz

# 进入目录
cd frp_0.31.2_linux_amd64
?
# 设置后台运行frp服务端
nohup ./frps -c ./frps.ini &

或者输出到指定目录 nohup ./frps -c ./frps.ini > log/log_202212.log 2>&1 &

查看 nohub.out 日志：

[root@VM_0_7_centos frp_0.31.2_linux_amd64]# cat nohup.out 
2020/03/24 22:48:05 [I] [service.go:152] frps tcp listen on 0.0.0.0:7000
2020/03/24 22:48:05 [I] [root.go:205] start frps success
[root@VM_0_7_centos frp_0.31.2_linux_amd64]# 

说明服务端启动成功。

1.2 客户端部署

客户端是windows系统，本次下载的文件是【frp_0.31.2_windows_386.zip】。

直接解压压缩包，修改 frpc.ini 文件：

[common]
server_addr = 111.X.X.34
server_port = 7000

[ssh]
type = tcp
local_ip = 127.0.0.1
local_port = 3389
remote_port = 6000

server_addr 是服务端 ip 地址。

进入解压的根目录，输入命令 frpc -c frpc.ini 启动客户端：

出现 start proxy success 说明启动成功。

windows开启远程桌面功能：

二、测试

找一台非局域网的电脑远程连接上面部署的windows电脑：

校验了用户名或密码错误，出现了这个说明连接到了，下面输入正确的用户名密码：

连接成功。

如有域名的话，可以将域名解析到这个公网服务器ip，然后通过【域名+端口】访问，这样方便记忆。

三、知识点

前面介绍的是基本使用，按照上面的步骤可以立马使用起来，但是缺乏安全性、便捷性等。

3.1 压缩包内文件介绍

压缩包有这个几个文件：

[root@iZbp1itnf4brss9ptmsq9fZ frp_0.31.2_linux_amd64]# ls
frpc  frpc_full.ini  frpc.ini  frps  frps_full.ini  frps.ini  LICENSE  systemd

• 客户端使用：frpc frpc_full.ini frpc.inifrpc：命令frpc_full.ini：配置文件完整示例frpc.ini：配置文件
• 服务端使用：frps frps_full.ini frps.inifrps：命令frps_full.ini：配置文件完整示例frps.ini：配置文件

3.2 服务端

先看下配置文件完整示例 frps_full.ini 的内容：

[root@iZbp1itnf4brss9ptmsq9fZ frp_0.31.2_linux_amd64]# cat frps_full.ini 
# [common] is integral section
[common]
# A literal address or host name for IPv6 must be enclosed
# in square brackets, as in "[::1]:80", "[ipv6-host]:http" or "[ipv6-host%zone]:80"
bind_addr = 0.0.0.0
bind_port = 7000

# udp port to help make udp hole to penetrate nat
bind_udp_port = 7001

# udp port used for kcp protocol, it can be same with 'bind_port'
# if not set, kcp is disabled in frps
kcp_bind_port = 7000

# specify which address proxy will listen for, default value is same with bind_addr
# proxy_bind_addr = 127.0.0.1

# if you want to support virtual host, you must set the http port for listening (optional)
# Note: http port and https port can be same with bind_port
vhost_http_port = 80
vhost_https_port = 443

# response header timeout(seconds) for vhost http server, default is 60s
# vhost_http_timeout = 60

# set dashboard_addr and dashboard_port to view dashboard of frps
# dashboard_addr's default value is same with bind_addr
# dashboard is available only if dashboard_port is set
dashboard_addr = 0.0.0.0
dashboard_port = 7500

# dashboard user and passwd for basic auth protect, if not set, both default value is admin
dashboard_user = admin
dashboard_pwd = admin

# dashboard assets directory(only for debug mode)
# assets_dir = ./static
# console or real logFile path like ./frps.log
log_file = ./frps.log

# trace, debug, info, warn, error
log_level = info

log_max_days = 3

# disable log colors when log_file is console, default is false
disable_log_color = false

# auth token
token = 12345678

# heartbeat configure, it's not recommended to modify the default value
# the default value of heartbeat_timeout is 90
# heartbeat_timeout = 90

# only allow frpc to bind ports you list, if you set nothing, there won't be any limit
allow_ports = 2000-3000,3001,3003,4000-50000

# pool_count in each proxy will change to max_pool_count if they exceed the maximum value
max_pool_count = 5

# max ports can be used for each client, default value is 0 means no limit
max_ports_per_client = 0

# if subdomain_host is not empty, you can set subdomain when type is http or https in frpc's configure file
# when subdomain is test, the host used by routing is test.frps.com
subdomain_host = frps.com

# if tcp stream multiplexing is used, default is true
tcp_mux = true

# custom 404 page for HTTP requests
# custom_404_page = /path/to/404.html

[plugin.user-manager]
addr = 127.0.0.1:9000
path = /handler
ops = Login

[plugin.port-manager]
addr = 127.0.0.1:9001
path = /handler
ops = NewProxy

3.2.1 启用 dashboard

改成：

[common]
bind_port = 7000
bind_udp_port = 7001
kcp_bind_port = 7000

dashboard_addr = 0.0.0.0
dashboard_port = 7500
dashboard_user = admin
dashboard_pwd = admin

3.2.2安全认证

如果别人知道了你的服务器ip和端口，别人就能使用你的服务器做穿透了：

[common]
server_addr = 111.X.X.34
server_port = 7000

为了保证安全，需要服务端和客户端添加相同的认证 token。

服务端添加如下配置后重启：

# auth token
token = wankun666

重启 frps，然后查看端口，如下已经启动成功了，我添加了很多端口：

[root@iZbp1itnf4brss9ptmsq9fZ frp_0.31.2_linux_amd64]# netstat -lnpt|grep frps
tcp6       0      0 :::11522                :::*                    LISTEN      1909/./frps         
tcp6       0      0 :::6022                 :::*                    LISTEN      1909/./frps         
tcp6       0      0 :::21672                :::*                    LISTEN      1909/./frps         
tcp6       0      0 :::7433                 :::*                    LISTEN      1909/./frps         
tcp6       0      0 :::8181                 :::*                    LISTEN      1909/./frps         
tcp6       0      0 :::11672                :::*                    LISTEN      1909/./frps         
tcp6       0      0 :::7000                 :::*                    LISTEN      1909/./frps         
tcp6       0      0 :::9306                 :::*                    LISTEN      1909/./frps         
tcp6       0      0 :::12379                :::*                    LISTEN      1909/./frps         
[root@iZbp1itnf4brss9ptmsq9fZ frp_0.31.2_linux_amd64]# kill -9 1909

这个时候客户端会出现连接失败，查看最新日志，提示 authorization failed 认证失败：

[root@localhost frp_0.31.2_linux_amd64]# tail -10 nohup.out 
2022/12/17 09:10:22 [W] [service.go:151] [ed52dcb97a69fd0b] reconnect to server error: authorization failed
2022/12/17 09:10:42 [I] [service.go:148] [ed52dcb97a69fd0b] try to reconnect to server...
2022/12/17 09:10:42 [E] [service.go:241] [ed52dcb97a69fd0b] authorization failed
2022/12/17 09:10:42 [W] [service.go:151] [ed52dcb97a69fd0b] reconnect to server error: authorization failed
2022/12/17 09:11:02 [I] [service.go:148] [ed52dcb97a69fd0b] try to reconnect to server...
2022/12/17 09:11:02 [E] [service.go:241] [ed52dcb97a69fd0b] authorization failed
2022/12/17 09:11:02 [W] [service.go:151] [ed52dcb97a69fd0b] reconnect to server error: authorization failed
2022/12/17 09:11:22 [I] [service.go:148] [ed52dcb97a69fd0b] try to reconnect to server...
2022/12/17 09:11:22 [E] [service.go:241] [ed52dcb97a69fd0b] authorization failed
2022/12/17 09:11:22 [W] [service.go:151] [ed52dcb97a69fd0b] reconnect to server error: authorization failed
...

服务端重新启动也会认证失败：

[root@localhost frp_0.31.2_linux_amd64]# ps -ef|grep frp
root     10861  5948  0 09:17 pts/0    00:00:00 grep --color=auto frp
root     20274     1  0 8月28 ?       00:37:05 ./frpc -c ./frpc.ini
[root@localhost frp_0.31.2_linux_amd64]# kill -9 20274
[root@localhost frp_0.31.2_linux_amd64]# ps -ef|grep frp
root     10947  5948  0 09:18 pts/0    00:00:00 grep --color=auto frp
[root@localhost frp_0.31.2_linux_amd64]# ./frpc -c frpc.ini 
2022/12/17 09:19:56 [E] [service.go:241] authorization failed
2022/12/17 09:19:56 [W] [service.go:97] login to server failed: authorization failed
authorization failed

客户端再添加token配置，然后重启：

# auth token
token = wankun666!!

重启成功了：

[root@localhost frp_0.31.2_linux_amd64]# ./frpc -c frpc.ini 
2022/12/17 09:22:25 [I] [service.go:250] [769ff70f636cb4ba] login to server success, get run id [769ff70f636cb4ba], server udp port [0]
2022/12/17 09:22:25 [I] [proxy_manager.go:144] [769ff70f636cb4ba] proxy added: [ssh redis12379 mssql7433 web11672 mysql9306 web8181 web11522 web21672]
2022/12/17 09:22:25 [I] [control.go:164] [769ff70f636cb4ba] [web8181] start proxy success
2022/12/17 09:22:25 [I] [control.go:164] [769ff70f636cb4ba] [mssql7433] start proxy success
2022/12/17 09:22:25 [I] [control.go:164] [769ff70f636cb4ba] [web11672] start proxy success
2022/12/17 09:22:25 [I] [control.go:164] [769ff70f636cb4ba] [mysql9306] start proxy success
2022/12/17 09:22:25 [I] [control.go:164] [769ff70f636cb4ba] [ssh] start proxy success
2022/12/17 09:22:25 [I] [control.go:164] [769ff70f636cb4ba] [web11522] start proxy success
2022/12/17 09:22:25 [I] [control.go:164] [769ff70f636cb4ba] [web21672] start proxy success
2022/12/17 09:22:25 [I] [control.go:164] [769ff70f636cb4ba] [redis12379] start proxy success

由于当前窗口关闭之后，程序就结束了，最后使用命令让其后台运行 nohup ./frpc -c ./frpc.ini &。

总结

本次介绍了下载安装frp服务端和客户端，配置实现了windows远程桌面连接，后续会介绍其他内容，欢迎关注我，不错过，不迷路。

（完）