Ubuntu Networking
To list all network interfaces in the system:
# lshw -class network
To get information about IP addresses and network statistics:
$ ip a $ ifconfig
To do easy IP filtering (network firewall) use
ufw.
Some examples:
# ufw allow proto tcp from any to any port 13,22,25,80,443,587,995 # ufw allow from any to any port 53 comment NameServer # ufw enable # ufw status verbose # ufw status numbered # ufw insert 1 deny proto tcp from x.x.x.x to any port 80,443 # ufw delete 1
To find which processes are using the most network bandwidth run:
# nethogs -v 3