Tomcat7 bind to port 80 fails in Ubuntu 14.04LTS

Question

I\'ve got a problem with my tomcat7 installation on a newly updated Ubuntu system. Ever since the update to 14.04 LTS, tomcat refuses to start on port 80 with an error that I ca

Answer 1

Start tomcat services using authbind this will allow user to start ports less than 1024 we do not need to redirect or iptables.

apt-get install authbind -y

To install Authbind software

chmod -R 755 /etc/authbind

group should be user group.

chown -Rh root:group /etc/authbind

After that run the below commands

cd /etc/authbind/byuid

As an example lets imagne user id is 2000 you can use your user id number

echo '0.0.0.0/0:1,1023' > 2000

That file should be own by user and group.

chown : 2000

chmod 700 2000

Add the below line in tomcat startup file $CATALINA_BASE/startup.sh

export JAVA_OPTS="$JAVA_OPTS -Djava.net.preferIPv4Stack=true"

For Starting tomcat using Authbind service startup.sh

Comment the below line

#$CATALINA_HOME/bin/startup.sh

Add This End as the end of the file

AUTHBIND_COMMAND="/usr/bin/authbind --deep /bin/bash -c " 

$AUTHBIND_COMMAND $CATALINA_HOME/bin/startup.sh   

now you should be able to start tomcat services as user with less that 1024 ports.