The simulation test disconnects the server from the public network

demand , Because the project environment of Party A needs to be configured in centos Inside the system , The company is equipped with one centos System server , Need to do LAN connectivity , Unable to access the public network environment

Step one ： Normal access to the public network

wget https://www.baidu.com

Step two ： adopt mac Address , Disable the Internet function of this server

Here you are prompted to make sure your network card configuration file , Is static ip

cat /sys/class/net/enp3s0/address

obtain mac Address

Step three ： Login router settings disable this mac Address online

Our router is ,TP-LINK equipment , You can make strategies according to your router

Because of two mac The address format is different , Revise it yourself , Change lowercase to uppercase : Change to - You can search for

Be careful ： Because the server is not downloading or surfing the Internet , I can't find it here mac Address , Download something from the server , Simulate surfing the Internet , Pull must be found on the router , Then join the blacklist

Simulate downloading things online

wget https://www.baidu.com

Step four ： Return to the server to check whether you can surf the Internet

Unable to access the Internet , Configuration is successful

Go to the Internet , Configuration is successful

[ Outside the chain picture transfer in …(img-FRK1E2WY-1658903228106)]