How to make sure that firewall is off?

Question

I'm new to Ubuntu. I want to turn off firewall and make sure that it's turned off and want to turn off iptables.

iptables:
  Installed: 1.4.21-1ubuntu1
  Candidate: 1.4.21-1ubuntu1
  Version table:
 *** 1.4.21-1ubuntu1 0
        500 http://us.archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages
        100 /var/lib/dpkg/status


Chain INPUT (policy ACCEPT)
target     prot opt source               destination         

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination         

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destinat

If not then to disable firewall completely do: sudo ufw disable . To check status do: sudo ufw status — Raphael, Jan 23 '16 at 21:47
thanks for replying , i want to check if iptables are installed or not , how can i check it ? — sam, Jan 23 '16 at 21:52
@Raphael if you need more then I have in the answer please leave a comment ;-) — Rinzwind, Jan 23 '16 at 21:55

score 26 · Accepted Answer · edited Oct 06 '17 at 06:20

26

sudo ufw status
Status: inactive

You can turn it off and on with ...

sudo ufw disable
sudo ufw enable

By default it is disabled.

You can check if there are iptables rules active with:

sudo iptables -L

Your output, with no lines between the target prot opt source destination header and the next Chain, indicates that no rules are active.

If you have iptables active this will cancel it

sudo iptables -X
sudo iptables -t nat -F
sudo iptables -t nat -X
sudo iptables -t mangle -F
sudo iptables -t mangle -X
sudo iptables -P INPUT ACCEPT
sudo iptables -P FORWARD ACCEPT
sudo iptables -P OUTPUT ACCEPT

explanation of all the options

If you want a graphical method:

sudo apt-get install gufw

Website
Image:

edited Oct 06 '17 at 06:20

muru

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answered Jan 23 '16 at 21:47

Rinzwind

299,756

Thanks , i tried firewall now and it's inactive so it's disabled , but iptables i want to check if it's installed ot not , and where can i find it ? – sam Jan 23 '16 at 21:53
installed does not mean rules active ;-) iptables -L to see if there are any rules. – Rinzwind Jan 23 '16 at 21:56
i edited post with result – sam Jan 23 '16 at 21:58
That result in your edit means there are NO rules active ;) – Rinzwind Jan 23 '16 at 21:59
do you mean beacuse target and source is empty ? – sam Jan 23 '16 at 22:00
1

yeah you would have seen lines with port numbers and things like that if it was active ;-) – Rinzwind Jan 23 '16 at 22:03
when i run "service ufw disable", it says ufw - unrecognized service. But "service ufw start", "service ufw stop" run ok. What would be the reason? – Отгонтөгс Миймаа Dec 21 '22 at 02:20

How to make sure that firewall is off?

1 Answers1