Need to open some ports to install Sentora system

Well, Sentora documentation is asking me to open this following ports:

20 & 21 : FTP 25 (TCP) : SMTP 53 (TCP & UDP) : DNS 80 (TCP & UDP) : HTTP 110 : POP3 143 : IMAP

Optional: If you have already setup (or will setup soon) SSL, you have to open also:

443 : HTTPS 3306: MySQL"

Yes, I want to use SSL. But I have no idea how to open a port in DO. Is that made on DNS or in the target Droplet?

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Which linux distro are you using?

On ubuntu you’d use the UFW command

You’d want to enable the rules you’d like and then enable the firewall. If this is just playing around then you may not need to enable the firewall. If it is production (even for personal use) then I’d enable the firewall and following best practices.

Have a look here:

If it is not ubuntu, you can install it on debian with

apt-get install ufw

I’m not sure about centos/RHEL. There might be UFW, otherwise you’d need to use iptables directly.

Like jntslvdrt said, I think the default state is open ports, so firewall turned off. Certainly when I’ve set up any servers for playing about, I’ve never had to write any firewall rules.

sentora is a great panel but with many security holes. If you are concerned about it you can use sentora-paranoid security script:

Look at this tutorial here :

Depending on which operating system you the information will very.

As you are using Ubuntu just follow that tutorial.

Also visit and you will get the commands to unblock the ports at their tutorial.