==== REQUIRED BASIC INFO OF YOUR IREDMAIL SERVER ====
- iRedMail version (check /etc/iredmail-release): iRedMail-1.3.2
- Deployed with iRedMail Easy or the downloadable installer? Downloadable installer
- Linux/BSD distribution name and version: Ubuntu Server 20.04
- Store mail accounts in which backend (LDAP/MySQL/PGSQL):  MariaDB
- Web server (Apache or Nginx): Nginx
- Manage mail accounts with iRedAdmin-Pro? No
- [IMPORTANT] Related original log or error message is required if you're experiencing an issue.
====

Hello,

Before I started installing iRedMail, I had UFW enabled, and only allow my IP to access port 2222.
Then after first installation, I received this

*************************************************************************

< Question > Would you like to use firewall rules provided by iRedMail?
< Question > File: /etc/default/iptables, with SSHD ports: 2222. [Y|n]Y
[ INFO ] Copy firewall sample rules.
< Question > Restart firewall now (with ssh ports: 2222)? [y|N]y
[ INFO ] Restarting firewall ...
[ INFO ] Updating ClamAV database (freshclam), please wait ...
ERROR: /var/log/clamav/freshclam.log is locked by another process
********************************************************************

I rebooted my server, when I checked my UFW status, it's now disabled, so I guess iRedMail disabled my firewall.

But it's ok, I can live with iptables, Then I do this

$ sudo iptables -L

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               destination

Panic ! my firewall accepts all connection.
My question is, what should I do with this iRedMail new generated file /etc/default/iptables ?
Because as we can see, everything is allowed.