Apr 25, 2015
How to enable/disable firewall on Ubuntu 18.04 Bionic May 26, 2020 How to enable and disable the firewall on Ubuntu 16.04 Jul 06, 2020 How to Disable Firewall (UFW) on Ubuntu 18.04 | PhoenixNAP KB
Firewall Disable / Enable and Stop/ Start in Redhat Linux
May 12, 2019 How to Stop and Disable Firewall on CentOS 8 Nov 18, 2019 How to Enable and Disable Firewall in Ubuntu: 11 Steps
I don't know about "Ubuntu", but in Linux generally, "iptables" isn't a service - it's a command to manipulate the netfilter kernel firewall. You can "disable" (or stop) the firewall by setting the default policies on all standard chains to "ACCEPT", and flushing the rules.
Feb 08, 2013 Ubuntu: Stat / Stop / Restart Iptables Firewall Service May 07, 2015 Install and use Firewalld on Ubuntu 18.04 / Ubuntu 16.04 List all firewall rules configured. # firewall-cmd --list-all public target: default icmp-block-inversion: … Ubuntu Firewall Open Ports - How to Open a Port in Ubuntu