One important firewall setting that every NIX admin should learn is about the ports and firewall security. As these are the heart of any server. An invalid or miss-configuration can lead to many threats to organizations data.
It is a good practice to close enable firewall settings on. Always open only those ports in firewall that are required for access. Close unnecessarily open ports immediately when not needed.
You can only set/see these settings when logged in as root user. Once logged in as root, firewall settings are part of administration under system. Clicking on firewall will give you below screen.
In this below screen i wan to open up port 1521 for my oracle database to be accessed from other machines. Clicking on Other ports >> Add >> user defined.
Will give you ability to allow this port via firewall settings. This is just a high level config. You can also set advanced settings selecting other options but that's out of scope for this tutorial. That's it port 1521 is available for outside world now on your host IP.
No comments:
Post a Comment