22.3. xinetd.d

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原文链接：https://yq.aliyun.com/articles/343044

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本文介绍如何通过yum安装并配置TFTP与RSYNC服务。对于TFTP服务，不仅介绍了依赖于xinetd的方式，还提到了独立的atftp-server安装配置；而对于RSYNC服务，则详细展示了其xinetd配置文件的编辑过程。

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# yum -y install xinetd

22.3.1. tftpd

# yum install -y tftp-server tftp

/etc/xinetd.d/tftp

# vim /etc/xinetd.d/tftp
# default: off
# description: The tftp server serves files using the trivial file transfer \
#       protocol.  The tftp protocol is often used to boot diskless \
#       workstations, download configuration files to network-aware printers, \
#       and to start the installation process for some operating systems.
service tftp
{
        socket_type             = dgram
        protocol                = udp
        wait                    = yes
        user                    = root
        server                  = /usr/sbin/in.tftpd
        server_args             = -s /tftpboot
        disable                 = yes
        per_source              = 11
        cps                     = 100 2
        flags                   = IPv4
}

disable = yes 改为 disable = no

mkdir /tftpboot
/etc/init.d/xinetd restart

22.3.1.1. atftp-server

# yum install -y atftp-server atftp

/etc/xinetd.d/tftp

# cat /etc/xinetd.d/tftp
# default: off
# description: The tftp server serves files using the trivial file transfer protocol. The tftp protocol is often used to boot diskless workstations, download configuration files to network-aware printers, and to start the installation process for some operating systems.
service tftp
{
    disable         = no
    socket_type     = dgram
    protocol        = udp
    wait            = yes
    user            = root
    server          = /usr/sbin/in.tftpd
    server_args     = /tftpboot
    per_source      = 11
    cps             = 100 2
    flags           = IPv4
}

atftp-server 是一个可以不依赖xinetd的tftp服务器

22.3.2. rsync

# vim /etc/xinetd.d/rsync
# default: off
# description: The rsync server is a good addition to an ftp server, as it \
#       allows crc checksumming etc.
service rsync
{
        disable = no
        socket_type     = stream
        wait            = no
        user            = root
        server          = /usr/bin/rsync
        server_args     = --daemon
        log_on_failure  += USERID
}

22.3.3. rshd

/etc/xinetd.d/rsh

# cat  /etc/xinetd.d/rsh
# default: on
# description: The rshd server is the server for the rcmd(3) routine and, \
#	consequently, for the rsh(1) program.  The server provides \
#	remote execution facilities with authentication based on \
#	privileged port numbers from trusted hosts.
service shell
{
	socket_type		= stream
	wait			= no
	user			= root
	log_on_success		+= USERID
	log_on_failure 		+= USERID
	server			= /usr/sbin/in.rshd
	disable			= no
}

访问权限配置

# cat /etc/hosts.allow
#
# hosts.allow	This file describes the names of the hosts which are
#		allowed to use the local INET services, as decided
#		by the '/usr/sbin/tcpd' server.
#
in.rshd : your.example.com 192.168.0.1

# cat /etc/hosts.deny
#
# hosts.deny	This file describes the names of the hosts which are
#		*not* allowed to use the local INET services, as decided
#		by the '/usr/sbin/tcpd' server.
#
# The portmap line is redundant, but it is left to remind you that
# the new secure portmap uses hosts.deny and hosts.allow.  In particular
# you should know that NFS uses portmap!
all : all

访问主机设置

# cat ~/.rhosts
your.example.com user
192.168.0.1	user

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原文出处：Netkiller 系列手札
本文作者：陈景峯
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