Question

Unable to allow new port using ufw

I have been trying to allow two new port 465 and 587 using ufw but can’t because it gives me error - ERROR: Bad port. Please can you tell me someone why I am getting this error.

However, I have used the command sudo ufw allow 465/smtp


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Thanks for the answer, I have solved it.

SMTP can be handled by TCP or UDP. So you can’t simply specify 465/smtp You’ll need to use:

sudo ufw allow 465/tcp

or drop the protocol all together for either.

Check out this article for more info on UFW:

Try sudo ufw allow 465/tcp sudo ufw allow 587/tcp