I want to allow all LAN traffic to my Ubuntu server. I have read the documentation and see the command, but when I try to edit the command for my IP range I get an error. How can I allow all traffic starting at -

sudo ufw allow from ERROR: Bad source address

It seems like the 15 (third octal) is causing the error. Almost like UFW does not expect a LAN to have a unique IP set.

Thank you

  • good question, but ufw is a simple interface above the iptables, you may able to do more control over packets via iptables. i prefer you to read this nice article about iptables: faqs.org/docs/iptables
    – pylover
    Jan 7 '13 at 23:50
  • 1
    @pylover This is not helpful for this question. UFW is useful to simplifiy iptable tasks and what he wants to do is possible with it. Aug 5 '14 at 18:43
sudo ufw allow from
  • Does 0/24 include IPs such as Oct 13 '09 at 16:16
  • 2
    Yes. includes adresses from to
    – Roy
    Oct 13 '09 at 16:41
  • 1
    What if i want to allow both (IN and OUT)? ufw allow out from to ?
    – 16851556
    Mar 7 '18 at 12:22
  • 2
    For those wondering about the /24, see here. Essentially, the first 24 bits of the IP address (192.168.15) are fixed. Jun 10 '19 at 9:55
  • 1
    I might be nitpicky, but is actually from to, totaling 256 IPs as 2^(32-24) Nov 25 '20 at 15:41

you need to do sudo ufw allow from yourip/24 like this

sudo ufw allow from 

replace 1 with your ip router.

To allow connections for particular IP addresses ranging from to to port 22 (SSH), run the following command

sudo ufw allow from to any port 22

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.