CentOS7下tftp服务安装配置

1、软件包安装

root用户或者普通用户使用sudo权限执行如下命令：

yum install xinetd tftp tftp-server        # root 用户执行
sudo yum install xinetd tftp tftp-server   # 普通用户执行

2、tftp-Server服务配置

[root@localhost ~]# 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
{
    socket_type        = dgram
    protocol           = udp
    wait               = yes
    user               = root
    server             = /usr/sbin/in.tftpd
    server_args        = -s /var/lib/tftpboot -c   # 注意这行，如果允许上传，一定要加上参数 -c
    disable            = no   # 这行默认为yes，改成no，允许
    per_source         = 11
    cps                = 100 2
    flags              = IPv4
}

3、启动tftp服务

[root@localhost ~]#systemctl restart xinetd.service 
[root@localhost ~]# netstat -a | grep tftp 
udp        0      0 0.0.0.0:tftp            0.0.0.0:*                          
udp6       0      0 [::]:tftp               [::]:* 
[root@localhost ~]# netstat -tunap | grep :69
udp        0      0 0.0.0.0:69              0.0.0.0:*                           30014/xinetd        
udp6       0      0 :::69                   :::*                                1/systemd  

4、测试上传下载

C:\>d:

D:\>tftp 10.190.38.213 get test.log
传输成功: 1 秒 17 字节，17 字节/秒

D:\>tftp 10.190.38.213 put d:\readme
传输成功: 1 秒 474 字节，474 字节/秒

D:\>

5、常见问题处理

5.1 如果上传时出现"连接请求失败"的提示，请确保tftp服务的文件存放目录权限设置正确

• 解决办法：chmod  0777  /var/lib/tftpboot

5.2 文件上传时提示：Error code 1: File not found

在/etc/xinetd.d/tftp配置文件中，server_args后加上 -c 选项，方可上传

service tftp
{
    socket_type     = dgram
    protocol        = udp
    wait            = yes   
    user            = root  
    server          = /usr/sbin/in.tftpd
    server_args     = -s /var/lib/tftpboot -c
    disable         = no    
    per_source      = 11    
    cps             = 100 2 
    flags           = IPv4  
}

5.3 如客户端无法连接，或包timeout

请确认服务器iptables策略开放了UDP的 69 端口，并关闭了selinux服务。

 iptables策略开放：

# 编辑iptables配置文件
[root@localhost ~]# vim /etc/sysconfig/iptables

# sample configuration for iptables service
# you can edit this manually or use system-config-firewall
# please do not ask us to add additional ports/services to this default configuration
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
-A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
-A INPUT -p icmp -j ACCEPT
-A INPUT -i lo -j ACCEPT
-A INPUT -p tcp -m state --state NEW -m tcp --dport 22 -j ACCEPT
-A INPUT -p udp -m state --state NEW -m tcp --dport 69 -j ACCEPT

或者执行如下命令：

iptables -A INPUT -p udp --dprot 69 -j ACCEPT