I don’t know anything about hacking. It’s true.
I know the basic theory behind some of the attacks, but in-depth knowledge is beyond me. I went to school for almost five years to learn how to program, and I can’t even tell you how to hack into a computer.
I like to think that the software that I write is immune to being hacked, but I don’t know for sure without having somebody else look for vulnerabilities. At this point, if I were to try to hack something, I would be a script kiddie. And that’s not something that you want to be.
At least there are a few guides on how to not become a script kiddie.
Alright, that’s a confusing title.
Anyway, the point of this is to show you how to setup Tomcat 8 on Debian 8 (Jessie), and to have it bind to port 80. This uses just the default packages from Debian, so if you are using a version of Tomcat that you downloaded directly from their website you may be out of luck.
First, install the needed packages(note: this causes Tomcat to start automatically):
$ apt-get install tomcat8 authbind
Now, we need to change the configuration settings for Tomcat and authbind to make sure that they work properly.
- Edit /etc/default/tomcat8. At the very end, there should be a line that says AUTHBIND=no. Change this to say AUTHBIND=yes
- Edit /etc/tomcat8/server.xml. In this file, there is an XML tag that starts out with <Connector port=”8080″ …. Change this to be 80. There are two sections that you want to change this.
- Go to /etc/authbind/byport. Do the following(note: this assumes that tomcat is running as the tomcat8 user, which it will do if you installed it through apt)
$ cd /etc/authbind/byport
$ touch 80
$ chown tomcat8 80
$ chmod 744 80
- Restart Tomcat
$ systemctl restart tomcat8
You should now be able to access Tomcat on port 80.