Linux Tutorial | Matt Cooper - Open Source Support
Linux Tutorial | Matt Cooper - Open Source Support
Tomcat Troubleshooting

Tomcat – Unable to Bind to Port 80

So you have changed the port on which Tomcat is served within the server.xml to port 80. Now you restart Tomcat which gives you the following catalina.out error:

 
SEVERE: java.net.BindException: Permission denied<null>:80 - 

After quite a lot of ‘Googling’ the fix was actually quite straight forward.

Simply edit the tomcat7 config file located in /etc/default/tomcat7:

 
vim /etc/default/tomcat7 

Uncommend ‘AUTHBIND=no’ and change to AUTHBIND=yes.

e.g.


# 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

Restart tomcat and that’s you running on port 80.

NOTE: Default installation of Tomcat 7 for Debian binds only ports higher than 1023 (Port 8080 by default). The above commands allows binding to privileged ports.

October 30, 2013by Matt Cooper
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Hi, I'm Matt Cooper. I started this blog to pretty much act as a brain dump area for things I learn from day to day. You can contact me at: matt@linuxtutorial.co.uk

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