What is frp?
frp is a fast reverse proxy that allows you to expose a local server located behind a NAT or firewall to the Internet. It currently supports TCP and UDP, as well as HTTP and HTTPS protocols, enabling requests to be forwarded to internal services via domain name.

frp also offers a P2P connect mode.

首先从官方取得程序包，Linux，Windows等。。。
https://github.com/fatedier/frp/

配置服务端frps.toml，同时监听TCP和UDP

# This configuration file is for reference only. Please do not use this configuration directly to run the program as it may have various issues.

# 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"
# For single "bindAddr" field, no need square brackets, like `bindAddr = "::"`.
bindAddr = "0.0.0.0"
bindPort = 8848

# udp port used for kcp protocol, it can be same with 'bindPort'.
# if not set, kcp is disabled in frps.
kcpBindPort = 8848

# udp port used for quic protocol.
# if not set, quic is disabled in frps.
# quicBindPort = 7002

# Specify which address proxy will listen for, default value is same with bindAddr
# proxyBindAddr = "127.0.0.1"

# quic protocol options
# transport.quic.keepalivePeriod = 10
# transport.quic.maxIdleTimeout = 30
# transport.quic.maxIncomingStreams = 100000

# Heartbeat configure, it's not recommended to modify the default value
# The default value of heartbeatTimeout is 90. Set negative value to disable it.
# transport.heartbeatTimeout = 90

# Pool count in each proxy will keep no more than maxPoolCount.
transport.maxPoolCount = 5

# If tcp stream multiplexing is used, default is true
transport.tcpMux = true

# Specify keep alive interval for tcp mux.
# only valid if tcpMux is true.
transport.tcpMuxKeepaliveInterval = 60

# tcpKeepalive specifies the interval between keep-alive probes for an active network connection between frpc and frps.
# If negative, keep-alive probes are disabled.
transport.tcpKeepalive = 7200

# transport.tls.force specifies whether to only accept TLS-encrypted connections. By default, the value is false.
tls.force = false

# transport.tls.certFile = "server.crt"
# transport.tls.keyFile = "server.key"
# transport.tls.trustedCaFile = "ca.crt"

# 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 bindPort
#vhostHTTPPort = 80
#vhostHTTPSPort = 443

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

# tcpmuxHTTPConnectPort specifies the port that the server listens for TCP
# HTTP CONNECT requests. If the value is 0, the server will not multiplex TCP
# requests on one single port. If it's not - it will listen on this value for
# HTTP CONNECT requests. By default, this value is 0.
# tcpmuxHTTPConnectPort = 1337

# If tcpmuxPassthrough is true, frps won't do any update on traffic.
# tcpmuxPassthrough = false

# Configure the web server to enable the dashboard for frps.
# dashboard is available only if webServer.port is set.
#webServer.addr = "127.0.0.1"
#webServer.port = 7500
#webServer.user = "admin"
#webServer.password = "admin"
# webServer.tls.certFile = "server.crt"
# webServer.tls.keyFile = "server.key"
# dashboard assets directory(only for debug mode)
# webServer.assetsDir = "./static"

# Enable golang pprof handlers in dashboard listener.
# Dashboard port must be set first
webServer.pprofEnable = false

# enablePrometheus will export prometheus metrics on webServer in /metrics api.
enablePrometheus = true

# console or real logFile path like ./frps.log
log.to = "/root/frp/frps.log"
# trace, debug, info, warn, error
log.level = "info"
log.maxDays = 3
# disable log colors when log.to is console, default is false
log.disablePrintColor = false

# DetailedErrorsToClient defines whether to send the specific error (with debug info) to frpc. By default, this value is true.
detailedErrorsToClient = true

# auth.method specifies what authentication method to use authenticate frpc with frps.
# If "token" is specified - token will be read into login message.
# If "oidc" is specified - OIDC (Open ID Connect) token will be issued using OIDC settings. By default, this value is "token".
auth.method = "token"

# auth.additionalScopes specifies additional scopes to include authentication information.
# Optional values are HeartBeats, NewWorkConns.
# auth.additionalScopes = ["HeartBeats", "NewWorkConns"]

# auth token
auth.token = "88488848"

# oidc issuer specifies the issuer to verify OIDC tokens with.
#auth.oidc.issuer = ""
# oidc audience specifies the audience OIDC tokens should contain when validated.
#auth.oidc.audience = ""
# oidc skipExpiryCheck specifies whether to skip checking if the OIDC token is expired.
#auth.oidc.skipExpiryCheck = false
# oidc skipIssuerCheck specifies whether to skip checking if the OIDC token's issuer claim matches the issuer specified in OidcIssuer.
#auth.oidc.skipIssuerCheck = false

# userConnTimeout specifies the maximum time to wait for a work connection.
# userConnTimeout = 10

# Only allow frpc to bind ports you list. By default, there won't be any limit.
#allowPorts = [
#  { start = 2000, end = 3000 },
#  { single = 3001 },
#  { single = 3003 },
#  { start = 4000, end = 50000 }
#]

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

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

# custom 404 page for HTTP requests
# custom404Page = "/path/to/404.html"

# specify udp packet size, unit is byte. If not set, the default value is 1500.
# This parameter should be same between client and server.
# It affects the udp and sudp proxy.
udpPacketSize = 1500

# Retention time for NAT hole punching strategy data.
natholeAnalysisDataReserveHours = 168

#[[httpPlugins]]
#name = "user-manager"
#addr = "127.0.0.1:9000"
#path = "/handler"
#ops = ["Login"]

#[[httpPlugins]]
#name = "port-manager"
#addr = "127.0.0.1:9001"
#path = "/handler"
#ops = ["NewProxy"]

使用systemd配置开机启动
nano /lib/systemd/system/frps.service

[Unit]
Description = frp server
After = network.target syslog.target
Wants = network.target

[Service]
Type = simple
ExecStart = /root/frp/frps -c /root/frp/frps.toml

[Install]
WantedBy = multi-user.target

添加开机启动

systemctl enable frpc

启动 frpc

systemctl start frpc