Linux安装rinetd实现TCP/UDP端口转发(rinetd使用教程)

在Linux系统中，rinetd是一个非常实用的工具，它可以帮助我们实现TCP和UDP端口的转发，rinetd是rsync、inetd和iptables的组合，它结合了这三个工具的优点，提供了一种高效、灵活的端口转发解决方案，本文将详细介绍如何在Linux系统中安装和使用rinetd实现TCP/UDP端口转发。

安装rinetd

1、我们需要安装rinetd的依赖包，在基于Debian的系统（如Ubuntu）中，可以使用以下命令安装：

sudo apt-get update
sudo apt-get install rsync inetutils-inetd

在基于RHEL的系统（如CentOS）中，可以使用以下命令安装：

sudo yum install rsync inetutils-inetd

2、接下来，我们需要下载rinetd的源码包，可以从GitHub上下载最新版本的源码包：

wget https://github.com/bahamas10/rinetd/archive/master.zip

3、解压源码包并进入解压后的目录：

unzip master.zip
cd rinetd-master

4、编译并安装rinetd：

make && sudo make install

配置rinetd

1、配置文件位于/etc/rinetd.conf，我们可以使用文本编辑器打开它进行编辑：

sudo nano /etc/rinetd.conf

2、在配置文件中，我们可以看到以下内容：

Default configuration for rinetd.
See rinetd(8) for more details.
The config file is parsed from top to bottom. Changes will be applied from the bottom up.
If you want to override some settings, just add them at the end of the file.
For example: server = myserver.example.com port = 80 protocol = tcp log = on delay = 500ms connect_timeout = 5s retry = 3 retries_between_failures = 60s max_failures = 10 keepalive = off data_connection_timeout = 300s send_buffer_size = 64k receive_buffer_size = 64k send_timeout = 300s receive_timeout = 300s user = nobody group = nogroup mode = 0666 socket_type = stream wait_for_client = off client_close = off client_abort = off client_no_linger = off client_keepalive = off client_send_timeout = 300s client_receive_timeout = 300s server_close = off server_abort = off server_no_linger = off server_keepalive = off server_send_timeout = 300s server_receive_timeout = 300s local_ip = all local_port = all remote_ip = all remote_port = all bindtodevice = none bindtodeviceaddr = none bindtodeviceport = none bindtointerface = none bindtointerfaceaddr = none bindtointerfaceport = none loglevel = info logfile = /var/log/rinetd.log logfacility = local7 use_privileged_ports = no allow_source_routed_packets = no allow_masquerade_addresses = no allow_nonlocal_binds = no allow_loose_source_routing = no allow_tcp_loopback = no allow_udp_loopback = no allow_icmp_loopback = no allow_raw_loopback = no allow_multicasts = yes allow_broadcasts = yes allow_pointtopoint = yes allow_promiscuous = no allow_additional_addresses = no allow_source_nat = no allow_destination_nat = no allow_transparent_proxying = no enable_tls = no enable_sslv3 = no enable_sslv2 = no enable_sslv1 = no enable_authentication = no enable_encryption = no enable_sessionreuse = no enable_sessiontickets = no enable_heartbeats = no enable_splicing = no enable_pseudostreams = no enable_nathelperapplications = no enable_nathelperprotocols = no enable_nathelperservices = no enable_nathelpermappings = no enable_nathelpersocketoptions = no enable_nathelpersockopttcpbehaviorchanges = no enable_nathelpersockoptudpbehaviorchanges = no enable_nathelpersockoptiptunnelingbehaviorchanges = no enable_nathelpersockopticmpbehaviorchanges = no enable { ... }  Example: server=myserver.example.com port=80 protocol=tcp connect=192.168.1.1:80 delay=500ms connect-timeout=5s retry=3 retries-between-failures=60s max-failures=10 keepalive=off data-connection-timeout=300s send-buffer-size=64k receive-buffer-size=64k send-timeout=300s receive-timeout=300s user=nobody group=nogroup mode=0666 socket-type=stream wait-for-client=off client-close=off client-abort=off client-no-linger=off client-keepalive=off client-send-timeout=300s client-receive-timeout=300s server-close=off server-abort=off server-no-linger=off server-keepalive=off server-send-timeout=300s server-receive-timeout=300s local-ip=all local-port=all remote-ip=all remote-port=all bindtodevice=none bindtodeviceaddr=none bindtodeviceport=none bindtointerface=none bindtointerfaceaddr=none bindtointerfaceport=none loglevel=info logfile=/var/log/rinetd.log logfacility=local7 use-privileged-ports=no allow-source-routed-packets=no allow-masquerade-addresses=no allow-nonlocal-binds=no allow-loose-source-routing=no allow-tcp-loopback=no allow-udp-loopback=no allow-icmp-loopback=no allow-raw-loopback=no allow-multicasts=yes allow-broadcasts=yes allow-pointtopoint=yes allow-promiscuous=no allow-additional-addresses=no allow-source-nat=no allow-destination-nat=no allow-transparent-proxying=no enable-tls=no enable-sslv3=no enable-sslv2=no enable-sslv1=no enable-authentication=no enable-encryption=no enable-sessionreuse=no enable-sessiontickets=no enable-heartbeats=no enable-splicing=no enable-pseudostreams=no enable-nathelperapplications=no enable-nathelperprotocols=no enable-nathelperservices=no enable-nathelpermappings=no enable-nathelpersocketoptions=no enable-nathelpersockopttcpbehaviorchanges=no enable-nathelpersockoptudpbehaviorchanges=no enable-nathelpersockoptiptunnelingbehaviorchanges=no enable