how to unblock port 547 on ubuntu droplet

Posted September 26, 2019 775 views

i want to send email from registration form on PHP Codeigniter but its seem like port 547 is blocked

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Hi @amjadgul05,

You’ll need to allow access on the port. If you are using only IPtables, Digital Ocean have a pretty good article about how to do it - ARTICLE

If you have installed csf for instance, you can allow the mentioned port in the configuration file


and then

TCP_OUT = some port, some port, 547, some port

I hope the above helps,

Kind regards,

by Mitchell Anicas
Iptables is a software firewall for Linux distributions. This cheat sheet-style guide provides a quick reference to iptables commands that will create firewall rules that are useful in common, everyday scenarios. This includes iptables examples of allowing and blocking various services by port, network interface, and source IP address.