Ubuntu's firewall UFW

This is a simple firewall, you can start and stop directly at the command line, you can also install the drawing end GUFW

* Installation

sudo apt-get install UFW GUFW

* Common Commands

sudo UFW enable//start

UFW Disable//stop

UFW default Deny//Set defaults external cannot connect to native

UFW Allow|deny Service//Allow or deny a connection, service view Etc/services

UFW Status//view UFW State

* Example

---prohibit native services

sudo ufw deny 22/tcp, the 22-port SSH service cannot be connected externally.

---prohibit external connections

sudo ufw deny from IP

* Configuration file/ETC/UFW

---ufw.conf

Set whether to boot UFW, and set the log level

See these for the time being.

Today, Iptux out a problem, the router is constantly contracted, causing the router to block, LAN can not be used.

Monitoring network traffic may be more important than CPU, one affecting the local, one affecting the network.

Ubuntu's firewall UFW