To stop the iptables firewall on a Debian system, you can use the systemctl command to disable and stop the iptables service:
sudo systemctl disable iptables sudo systemctl stop iptables
This will disable the iptables service and stop it from running on system boot. However, it will not delete any existing iptables rules.
To delete all iptables rules, you can use the iptables command with the --flush option:
sudo iptables --flush
This will delete all the existing iptables rules, allowing all incoming and outgoing traffic.
Keep in mind that disabling the iptables firewall can leave your system vulnerable to malicious network traffic, so it is generally recommended to keep the firewall enabled and properly configured.
If you want to temporarily disable the firewall for testing purposes, you can use the iptables command with the -P option to set the default policy for all chains to ACCEPT:
sudo iptables -P INPUT ACCEPT sudo iptables -P FORWARD ACCEPT sudo iptables -P OUTPUT ACCEPT
This will allow all incoming and outgoing traffic, but it will not delete any existing iptables rules, so you can easily restore the firewall by running the iptables command with the --flush option.