这篇文章主要介绍“CentOS7下怎么配置虚拟路由器”，在日常操作中，相信很多人在CentOS7下怎么配置虚拟路由器问题上存在疑惑，小编查阅了各式资料，整理出简单好用的操作方法，希望对大家解答”CentOS7下怎么配置虚拟路由器”的疑惑有所帮助！接下来，请跟着小编一起来学习吧！
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一、环境及需求说明
本地测试环境，由于win7+vmware这台机器网卡太新，无法被vmware exsi识别，无奈之下就直接装了个win7，然后再上面基于vmware workstation 12开启了一些临时测试的虚拟机。其次本地直连网段192.168.1.0 ip有限，而又希望直接从本机(如图win10) ssh连接到这些虚拟机，因此考虑使用linux的ip转发功能来实现。
上述图片中已经列出了各个节点的ip信息，红色的虚拟机充当软路由，配置好之后，实现win10 直接ssh到虚拟机。
二、虚拟路由服务器配置
###查看网卡信息
[root@centos7-router ~]# ip addr
1: lo: mtu 65536 qdisc noqueue state unknown
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eno16777728: mtu 1500 qdisc pfifo_fast state up qlen 1000
link/ether 00:0c:29:9c:eb:2d brd ff:ff:ff:ff:ff:ff
inet 172.24.8.254/24 brd 172.24.8.255 scope global eno16777728
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fe9c:eb2d/64 scope link
valid_lft forever preferred_lft forever
3: eno33554960: mtu 1500 qdisc pfifo_fast state up qlen 1000
link/ether 00:0c:29:9c:eb:37 brd ff:ff:ff:ff:ff:ff
inet 192.168.1.175/24 brd 192.168.1.255 scope global dynamic eno33554960
valid_lft 82384sec preferred_lft 82384sec
inet6 fe80::20c:29ff:fe9c:eb37/64 scope link
valid_lft forever preferred_lft forever
###查看路由表
[root@centos7-router ~]# route -n
kernel ip routing table ###缺省情况下，每块网卡都有一个基于本网段的路由记录
destination gateway genmask flags metric ref use iface
0.0.0.0 192.168.1.1 0.0.0.0 ug 100 0 0 eno33554960
172.24.8.0 0.0.0.0 255.255.255.0 u 100 0 0 eno16777728
192.168.1.0 0.0.0.0 255.255.255.0 u 100 0 0 eno33554960
###使用ip命令方式查看路由
[root@centos7-router ~]# ip route list
default via 192.168.1.1 dev eno33554960 proto static metric 100
172.24.8.0/24 dev eno16777728 proto kernel scope link src 172.24.8.254 metric 100
192.168.1.0/24 dev eno33554960 proto kernel scope link src 192.168.1.175 metric 100
###开启ip forward
[root@centos7-router ~]# cp /usr/lib/sysctl.d/50-default.conf /usr/lib/sysctl.d/50-default.conf.bk
[root@centos7-router ~]# echo "net.ipv4.ip_forward = 1" >>/usr/lib/sysctl.d/50-default.conf
[root@centos7-router ~]# grep ip_forward /usr/lib/sysctl.d/50-default.conf
net.ipv4.ip_forward = 1
[root@centos7-router ~]# sysctl -p ###如不生效重启一下os
三、centos7-a主机下添加路由
###查看当前主机ip 信息
[root@centos7-a ~]# ip addr list
1: lo: mtu 65536 qdisc noqueue state unknown
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eno16777728: mtu 1500 qdisc pfifo_fast state up qlen 1000
link/ether 00:0c:29:57:26:9d brd ff:ff:ff:ff:ff:ff
inet 172.24.8.131/24 brd 172.24.8.255 scope global dynamic eno16777728
valid_lft 1088sec preferred_lft 1088sec
inet6 fe80::20c:29ff:fe57:269d/64 scope link
valid_lft forever preferred_lft forever
###查看当前主机路由信息
[root@centos7-a ~]# ip route list
172.24.8.0/24 dev eno16777728 proto kernel scope link src 172.24.8.131 metric 100
[root@centos7-a ~]# # author : leshami
[root@centos7-a ~]# # blog : http://blog.csdn.net/leshami
[root@centos7-a ~]# ip route add default via 172.24.8.254
[root@centos7-a ~]# ip route list
default via 172.24.8.254 dev eno16777728
172.24.8.0/24 dev eno16777728 proto kernel scope link src 172.24.8.131 metric 100
###测试到虚拟路由器网关ip连通性
[root@centos7-a ~]# ping 172.24.8.254 -c 2
ping 172.24.8.254 (172.24.8.254) 56(84) bytes of data.
64 bytes from 172.24.8.254: icmp_seq=1 ttl=64 time=0.268 ms
64 bytes from 172.24.8.254: icmp_seq=2 ttl=64 time=0.302 ms
--- 172.24.8.254 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1000ms
rtt min/avg/max/mdev = 0.268/0.285/0.302/0.017 ms
###测试到虚拟路由器ip连通性
[root@centos7-a ~]# ping 192.168.1.175 -c 2
ping 192.168.1.175 (192.168.1.175) 56(84) bytes of data.
64 bytes from 192.168.1.175: icmp_seq=1 ttl=64 time=0.475 ms
64 bytes from 192.168.1.175: icmp_seq=2 ttl=64 time=0.443 ms
--- 192.168.1.175 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1000ms
rtt min/avg/max/mdev = 0.443/0.459/0.475/0.016 ms
四、windows 10下配置路由
###当前环境
c:\>systeminfo | findstr build
os version: 10.0.14393 n/a build 14393
os build type: multiprocessor free
###查看当前的路由信息
c:\>route print -4
===========================================================================
interface list
7...54 ab 3a xx b8 ea ......intel(r) ethernet connection i219-v
21...ac 2b 6e 5f 3b 57 ......microsoft wi-fi direct virtual adapter
......
===========================================================================
ipv4 route table
===========================================================================
active routes:
network destination netmask gateway interface metric
0.0.0.0 0.0.0.0 192.168.1.1 192.168.1.242 35
127.0.0.0 255.0.0.0 on-link 127.0.0.1 331
127.0.0.1 255.255.255.255 on-link 127.0.0.1 331
127.255.255.255 255.255.255.255 on-link 127.0.0.1 331
172.24.10.0 255.255.255.0 on-link 172.24.10.1 291
172.24.10.1 255.255.255.255 on-link 172.24.10.1 291
172.24.10.255 255.255.255.255 on-link 172.24.10.1 291
192.168.1.0 255.255.255.0 on-link 192.168.1.242 291
192.168.1.242 255.255.255.255 on-link 192.168.1.242 291
192.168.1.255 255.255.255.255 on-link 192.168.1.242 291
192.168.16.0 255.255.255.0 on-link 192.168.16.1 291
192.168.16.1 255.255.255.255 on-link 192.168.16.1 291
192.168.16.255 255.255.255.255 on-link 192.168.16.1 291
224.0.0.0 240.0.0.0 on-link 127.0.0.1 331
224.0.0.0 240.0.0.0 on-link 192.168.1.242 291
224.0.0.0 240.0.0.0 on-link 192.168.16.1 291
224.0.0.0 240.0.0.0 on-link 172.24.10.1 291
255.255.255.255 255.255.255.255 on-link 127.0.0.1 331
255.255.255.255 255.255.255.255 on-link 192.168.1.242 291
255.255.255.255 255.255.255.255 on-link 192.168.16.1 291
255.255.255.255 255.255.255.255 on-link 172.24.10.1 291
===========================================================================
persistent routes:
none
###添加持久化路由
c:\>route add 172.24.8.0 mask 255.255.255.0 192.168.1.175 -p
ok!
c:\>route print -4
ipv4 route table
===========================================================================
active routes:
network destination netmask gateway interface metric
0.0.0.0 0.0.0.0 192.168.1.1 192.168.1.242 35
127.0.0.0 255.0.0.0 on-link 127.0.0.1 331
127.0.0.1 255.255.255.255 on-link 127.0.0.1 331
127.255.255.255 255.255.255.255 on-link 127.0.0.1 331
172.24.8.0 255.255.255.0 192.168.1.175 192.168.1.242 36
172.24.10.0 255.255.255.0 on-link 172.24.10.1 291
172.24.10.1 255.255.255.255 on-link 172.24.10.1 291
172.24.10.255 255.255.255.255 on-link 172.24.10.1 291
192.168.1.0 255.255.255.0 on-link 192.168.1.242 291
192.168.1.242 255.255.255.255 on-link 192.168.1.242 291
192.168.1.255 255.255.255.255 on-link 192.168.1.242 291
192.168.16.0 255.255.255.0 on-link 192.168.16.1 291
192.168.16.1 255.255.255.255 on-link 192.168.16.1 291
192.168.16.255 255.255.255.255 on-link 192.168.16.1 291
224.0.0.0 240.0.0.0 on-link 127.0.0.1 331
224.0.0.0 240.0.0.0 on-link 192.168.1.242 291
224.0.0.0 240.0.0.0 on-link 192.168.16.1 291
224.0.0.0 240.0.0.0 on-link 172.24.10.1 291
255.255.255.255 255.255.255.255 on-link 127.0.0.1 331
255.255.255.255 255.255.255.255 on-link 192.168.1.242 291
255.255.255.255 255.255.255.255 on-link 192.168.16.1 291
255.255.255.255 255.255.255.255 on-link 172.24.10.1 291
===========================================================================
persistent routes: ###以下为添加的持久化路由记录
network address netmask gateway address metric
172.24.8.0 255.255.255.0 192.168.1.175 1
===========================================================================
五、验证两边连通性
###从linux端ping windows 10
[root@centos7-a ~]# ping 192.168.1.242 -c 2
ping 192.168.1.242 (192.168.1.242) 56(84) bytes of data.
64 bytes from 192.168.1.242: icmp_seq=1 ttl=63 time=1.70 ms
64 bytes from 192.168.1.242: icmp_seq=2 ttl=63 time=1.10 ms
--- 192.168.1.242 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1002ms
rtt min/avg/max/mdev = 1.101/1.404/1.707/0.303 ms
###从windows 10端ping linux
c:\>ping 172.24.8.131 -t
pinging 172.24.8.131 with 32 bytes of data:
reply from 172.24.8.131: bytes=32 time=1ms ttl=63
reply from 172.24.8.131: bytes=32 time=1ms ttl=63
注，如果测试有问题，请考虑是否被防火墙拦住。
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