I installed tomcat4.0.2 in /home/user. Everything works. But after I edited server.xml file to changed port from 8080 to 80 I can not start tomcat anymore. I get this error in Catalina.out file: Why? Thanks. Catalina.start: LifecycleException: null.open: java.net.BindException: Permission denied:80 LifecycleException: null.open: java.net.BindException: Permission denied:80 at org.apache.catalina.c