SUNScholar/Prepare Ubuntu/S05

Step 5.1: Install Tomcat

Type the following:

apt-get install tomcat6

Step 5.2: Allow Tomcat to listen on ports "80" and "443"

Step 5.2.1: Setup "authbind" for Tomcat

To enable Tomcat to listen on a privileged port below 100, we need to enable "authbind". Edit the /etc/default/tomcat6 file as follows:

nano /etc/default/tomcat6

Remove the hash sign from in front of the authbind parameter and change authbind to yes as follows

# If you run Tomcat on port numbers that are all higher than 1023, then you
# do not need authbind.  It is used for binding Tomcat to lower port numbers.
# NOTE: authbind works only with IPv4.  Do not enable it when using IPv6.
# (yes/no, default: no)
AUTHBIND=yes

Now we need to tell "authbind" that Tomcat is allowed to use lower port numbers. Type the following commands:

touch /etc/authbind/byport/80

touch /etc/authbind/byport/443

chmod 0755 /etc/authbind/byport/80

chmod 0755 /etc/authbind/byport/443

chown tomcat6.tomcat6 /etc/authbind/byport/80

chown tomcat6.tomcat6 /etc/authbind/byport/443

Now Tomcat has permission to use ports 80 and 443.

Step 5.2.2: Setup Tomcat server listening ports

Now we tell the Tomcat server to listen on the "authbind" ports. Edit the following file.

nano /etc/tomcat6/server.xml

Find the connector for port 8080 and change it to port 80. Also add the UTF-8 encoding. See example below.

    <Connector port="80" protocol="HTTP/1.1" 
               connectionTimeout="20000" 
               URIEncoding="UTF-8"
               redirectPort="8443" />

Find the connector for port 8443 and change it to port 443. Remove the comments around the port "443" connector section. These are the <!-- and --> comment directives.

    <Connector port="443" protocol="HTTP/1.1" SSLEnabled="true"
               maxThreads="150" scheme="https" secure="true"
               clientAuth="false" sslProtocol="TLS" 

Save the file.

If enabled, comment out the AJP 1.3 connector. It is not needed.

Now setup the secure connection to the Tomcat server. Then return here to continue the setup.

Step 5.3: Setup Tomcat admin users

Type as follows:

nano /etc/tomcat6/tomcat-users.xml

Delete all the contents of the file and add the following admin and manager roles with a password.

<?xml version='1.0' encoding='utf-8'?>
<tomcat-users>
  <role rolename="manager"/>
  <role rolename="admin"/>
  <user username="dspace" password="dspace" roles="admin,manager"/>
</tomcat-users>

Save the file by pressing CTL+O and then CTL+X on the keyboard.

Step 5.4: Setup Tomcat group permissions

Type the following in a terminal.

adduser tomcat6 dspace

adduser dspace tomcat6

Step 5.5: Restart the Tomcat server

Now restart the tomcat server as follows:

/etc/init.d/tomcat6 restart

Step 5.6: Post Tomcat installation checks

Now let's look if all went well:

netstat -tapn | grep java

Tomcat should be listening on ports 80 and 443:

root@server1:~# netstat -tapn | grep java
tcp        0      0 127.0.0.1:8005          0.0.0.0:*               LISTEN      8063/java       
tcp        0      0 0.0.0.0:80              0.0.0.0:*               LISTEN      8063/java       
tcp        0      0 0.0.0.0:443             0.0.0.0:*               LISTEN      8063/java       
tcp        0      0 127.0.0.1:34113         127.0.0.1:5432          ESTABLISHED 8063/java       
tcp        0      0 127.0.0.1:34112         127.0.0.1:5432          ESTABLISHED 8063/java 
root@server1:~#

Thats it, now you have a working Java webapp server.

SUNScholar server load using the Tomcat "authbind" method.

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