1. VyOS简介
VyOS是一个开源的网络操作系统，可以安装在物理硬件上，也可以安装在你自己的虚拟机上，或者是一个云平台上。它基于GNU/Linux，并加入了多个应用程序，如：Quagga, ISC DHCPD, OpenVPN, StrongS/WAN等，以及其他的管理界面。
VyOS系统安装最低要求512M内存和2G存储即可。
2. 实验需求
最近工作中需要用到vyos软路由，现将工作中搭建的过程总结如下。
vyos开启dhcp，开启80和21端口转发
3. 环境准备
| 机器名称 | 配置 | 地址 | 备注 |
| vyos | 2C4G | eth0 172.16.0.99 eth1 192.168.10.1 |
两块网卡，eth0为外网，可以连接internet，eth1为内网 |
| vm1 | 2C4G | dhcp获取 | 一块网卡 |
| vm2 | 2C4G | 192.168.10.150 | 一块网卡 |
4. 实验拓扑
说明：
1.vyos开启dhcp，80端口转发和21端口转发
2.vm1 dhcp获取地址
3.vm2 配置静态地址，开启web服务和ftp服务
5. 基本设置
5.1 查看设置
# 查看全部设置
vyos@vyos:~$ show configuration
# 匹配查询
vyos@vyos:~$ show configuration commands | match eth0
# 查看网卡设置
vyos@vyos:~$ show interfaces
5.2 配置网卡
# 进入配置模式
vyos@vyos:~$ configure
# 设置网卡描述
vyos@vyos# set interfaces ethernet eth0 description 'PUBLIC NETWORK'
vyos@vyos# set interfaces ethernet eth1 description 'PRIVATE NETWORK'
# 配置ip地址
vyos@vyos# set interfaces ethernet eth0 address 172.16.0.99/24
vyos@vyos# set protocols static route 0.0.0.0/0 next-hop '172.16.0.254'
vyos@vyos# set interfaces ethernet eth1 address 192.168.10.1/24
# 开启ssh
vyos@vyos# set service ssh port '22'
# 保存配置
vyos@vyos# commit
vyos@vyos# save
5.3 配置dns转发
vyos@vyos# set service dns forwarding cache-size '0'
vyos@vyos# set service dns forwarding listen-on eth0
vyos@vyos# set service dns forwarding listen-on eth1
vyos@vyos# set service dns forwarding name-server '114.114.114.114'
vyos@vyos# set service dns forwarding name-server '8.8.8.8'
vyos@vyos# commit
vyos@vyos# save
5.4 配置dhcp服务
vyos@vyos# set service dhcp-server disabled 'false'
vyos@vyos# set service dhcp-server shared-network-name LAN description 'LAN DHCP'
vyos@vyos# set service dhcp-server shared-network-name LAN subnet 192.168.10.0/24 default-router 192.168.10.1
vyos@vyos# set service dhcp-server shared-network-name LAN subnet 192.168.10.0/24 start 192.168.10.100 stop 192.168.10.200
vyos@vyos# set service dhcp-server shared-network-name LAN subnet 192.168.10.0/24 lease '86400'
vyos@vyos# set service dhcp-server shared-network-name LAN subnet 192.168.10.0/24 dns-server 192.168.10.1
vyos@vyos# commit
vyos@vyos# save
5.5 配置内网出公网
vyos@vyos# set nat source rule 100 description 'TO INTERNET'
vyos@vyos# set nat source rule 100 source address 192.168.10.0/24
vyos@vyos# set nat source rule 100 outbound-interface eth0
vyos@vyos# set nat source rule 100 translation address 172.16.0.99
vyos@vyos# commit
vyos@vyos# save
5.6 配置web转发
vyos@vyos# set nat destination rule 1000 description "WEB SERVER"
vyos@vyos# set nat destination rule 1000 inbound-interface eth0
vyos@vyos# set nat destination rule 1000 destination address 172.16.0.99
vyos@vyos# set nat destination rule 1000 source address 0.0.0.0/0
vyos@vyos# set nat destination rule 1000 destination port 80
vyos@vyos# set nat destination rule 1000 protocol tcp
vyos@vyos# set nat destination rule 1000 translation address 192.168.10.150
vyos@vyos# set nat destination rule 1000 translation port 80
vyos@vyos# commit
vyos@vyos# save
5.7 配置ftp转发
vyos@vyos# set nat destination rule 1001 description "FTP SERVER"
vyos@vyos# set nat destination rule 1001 inbound-interface eth0
vyos@vyos# set nat destination rule 1001 destination address 172.16.0.99
vyos@vyos# set nat destination rule 1001 protocol tcp
vyos@vyos# set nat destination rule 1001 source address 0.0.0.0/0
vyos@vyos# set nat destination rule 1001 destination port 21
vyos@vyos# set nat destination rule 1001 translation address 192.168.10.150
vyos@vyos# set nat destination rule 1001 translation port 21
vyos@vyos# commit
vyos@vyos# save
5.8 测试检查
vm1设置网卡dhcp，重启网卡。发现可以获取到ip192.168.10.100，并可以连接外网
vm2设置网卡静态ip地址，重启网卡。并开启web和ftp服务
测试成功转发
参考资料