Lesson5 -Linux Network Configuration

basic tasks
1.ifconfig show ip,networkcard infomation eth0
2.sudo dhclient release renew IP configuration
3.sudo /etc/init.d/neworking restart restart networking servers when you change severs configuration
Configuration files
4. sudo vim /etc/network/interface
auto eth0
iface eth0 inet stadig
address 10.1.10.5
netmask
network 10.1.10.0
broadcast 10.1.10.255
gateway 10.1.10.1 router
auto eth0
ifces eth0 inet dhcp
edit DNS files
sudo vim /etc/resolv.conf
10.1.10.1
hostname
sudo /bin/hostname name change hostname
remember restart
ping
ping 10.1.10.1 router
ping www.com
control+c stop ping
UFW firewall
sudo ufw status show firewall status
sudo ufw default allow
deny
sudo ufw enable turn on your firewall
disable
sudo ufw allow 80 (allow port 80 come in)
deny 80
sudo ufw delete allow 80 (delete rules)
deny
sudo ufw allow from 202.10.10.11
deny (allow IP address)
sudo ufw allow from 202.80.1.108 to 22 (to this particular port)

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