Why is port 8080 blocked on my computer? Is there something to do to open it, or is it a bug?

If your server is running Windows try this:

ControlPanel > System Security > Windows Firewall > Advance Settings > inboundRules > New Rule

Add port 8080 and let us know if that solves your question.

If you are running Linux...

First, you should disable selinux, edit file /etc/sysconfig/selinux so it looks like this:

  1. SELINUX=disabledSELINUXTYPE=targeted 

Save file and restart system.

Then …