计算机那些事普通

Tomcat7: Change Port to 80

I have many servers, which run Java Web applications. For development, I like Jetty, but for production, I prefer Tomcat7 now.

In ubuntu, you need root permission to use ports under 1024.

When you Google this topic, you will find a lot of solutions around the Internet, but many of them are not so useful, even some try to trap you.

So I just record what I do for this issue in Ubuntu:

  1. Open /var/lib/tomcat7/conf/server.xml or /etc/tomcat7/server.xml(they are the same), modify code as below

    1
    2
    3
    4
    5
    6
    7
    8
    <!-- more code here -->

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

    <!-- more code here -->

  2. Open /etc/default/tomcat:

    1
    2
    3
    4
    5
    # 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

  3. In very rare case, you need to change TOMCAT7_USER=tomcat7 to TOMCAT7_USER=root. [This is not recommended]