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Block an IP address using UFW rules

Solution

Ubuntu FireWall (UFW) is just what it's name implies. It is also a wrapper for iptables.


 

To enable UFW.....

  • sudo ufw enable

To open specific ports.....

  • sudo ufw allow PORTNUMBER

To add a rule in a numbered format (allow rules specified BEFORE deny rules will override the deny rule, and vice-versa).....

  • sudo ufw insert 1 allow PORTNUMBER

To block packets coming from a specific IP.....

  • sudo ufw deny from IPADDRESS to any

To block packets going to a specific IP.....

  • sudo ufw deny to IPADDRESS from any

 

 

Special thanks to.....

https://help.ubuntu.com/lts/serverguide/firewall.html#firewall-ufw

.....and.....

https://www.cyberciti.biz/faq/how-to-block-an-ip-address-with-ufw-on-ubuntu-linux-server/

 

 
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Article details
Article ID: 4
Category: Ubuntu
Date added: 2018-08-14 19:32:32
Rating (Votes): Article rated 4.0/5.0 (4)

 
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