How to Change tomcat8 port 8080 to 80

Question

I am using tomcat8 and i have changed http port in cofg/server.xml as

In http connector i have changed port 8080 to 80

< Connector port="80" protocol="HTTP/1.1"
               connectionTimeout="20000"
               redirectPort="8443" />

I have restarted tomcat but i have got this error

apache.catalina.core.AprLifecycleListener.initializeSSL OpenSSL successfully initialized [OpenSSL 1.1.1  11 Sep 2018]
18-Jun-2019 18:20:46.933 INFO [main] org.apache.coyote.AbstractProtocol.init Initializing ProtocolHandler ["http-nio-80"]
18-Jun-2019 18:20:46.961 SEVERE [main] org.apache.catalina.core.StandardService.initInternal Failed to initialize connector [Connector[HTTP/1.1-80]]
 org.apache.catalina.LifecycleException: Failed to initialize component [Connector[HTTP/1.1-80]]
        at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:113)

Caused by: org.apache.catalina.LifecycleException: Protocol handler initialization failed
        at org.apache.catalina.connector.Connector.initInternal(Connector.java:996)
        at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:107)
        ... 12 more
Caused by: java.net.SocketException: Permission denied
        at java.base/sun.nio.ch.Net.bind0(Native Method)
        at java.base/sun.nio.ch.Net.bind(Net.java:461)

Please anyone help me how to start tomcat8 on port 80. I have above erroe after changing port inside server.xml

Possible duplicate of [How to change the port of Tomcat from 8080 to 80?](https://stackoverflow.com/questions/4756039/how-to-change-the-port-of-tomcat-from-8080-to-80) — Ori Marko, Jun 20 '19 at 13:49
@user7294900 after etc/default/tomcat7 set AUTHBIND=yes i am able to run tomcat on port 80 but now i am calling url http://ipaddress/ApplicationPath , then i got Connection timed out in browser i have also set authbind . If i have run curl command inside server like curl http://ipaddress/ApplicationPath then it give me can u tell me correct response .Please help me what is this issue — Anuj Dhiman, Jun 20 '19 at 14:45

score 1 · Answer 1 · answered Jun 21 '19 at 19:14

Port 80 is a privileged port. You have a few options:

Use a proxy like haproxy to bind to port 80 then forward to tomcat 8080
Use authbind to give permission to tomcat to bind to port 80
Use iptables kernel redirect from 80 to 8080

The second and third are [marginally] better performance since they happen in the kernel, but you'd only see any sort of latency or throughput increase in really really busy servers

How to Change tomcat8 port 8080 to 80

1 Answers1