6 Replies Latest reply on Jun 17, 2020 6:51 PM by Dude!

Want to use Port 80 for Java Application

Jamsher Jun 17, 2020 2:07 PM

Hi Gurus,

Version : Oracle Linux Server release 6.10

Can anyone please provide steps how I can use default http port 80 for one of our JAVA Application , I tried to google I learned we cannot use Ports below 1024.

and getting very complex solutions.

I am trying to start to start our application on port 80 getting below error

[ucas_build@jedloungeapp1 bin]$ ./start.sh

=========================================================================

JBoss Bootstrap Environment

JBOSS_HOME: /app/wildfly-8.2.1.Final

JAVA: /app/java/jdk1.8.0_221/bin/java

16:51:25,685 INFO [org.wildfly.extension.undertow] (MSC service thread 1-8) JBAS017525: Started server default-server.

16:51:25,773 ERROR [org.jboss.msc.service.fail] (MSC service thread 1-8) MSC000001: Failed to start service jboss.undertow.listener.default: org.jboss.msc.service.StartException in service jboss.undertow.listener.default: Could not start http listener

at org.wildfly.extension.undertow.ListenerService.start(ListenerService.java:137)

at org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1948) [jboss-msc-1.2.2.Final.jar:1.2.2.Final]

at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1881) [jboss-msc-1.2.2.Final.jar:1.2.2.Final]

at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [rt.jar:1.8.0_221]

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [rt.jar:1.8.0_221]

at java.lang.Thread.run(Thread.java:748) [rt.jar:1.8.0_221]

Caused by: java.net.SocketException: Permission denied

at sun.nio.ch.Net.bind0(Native Method) [rt.jar:1.8.0_221]

If anybody has fixed this issue with easy steps please help me.

Thanks & Best Regards

Jamsher

1. Re: Want to use Port 80 for Java Application

Nik Jun 17, 2020 3:03 PM (in response to Jamsher)

Hi.
Only root user can open port < 1024.

So You can:
   -run this application as root
   - use sudo for run application
   - Start application on any port > 1024 and configure firewall for redirect traffic from port 80 to application port.

Regards,
   Nik
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2. Re: Want to use Port 80 for Java Application

Jamsher Jun 17, 2020 3:15 PM (in response to Nik)

Hi Nik,

Thanks for reply if you have hand commands can you share how to configure firewall to redirect traffic

Best Regards
Jamsher
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3. Re: Want to use Port 80 for Java Application

Nik Jun 17, 2020 3:31 PM (in response to Jamsher)

Hi.
https://docs.fedoraproject.org/en-US/Fedora/19/html/Security_Guide/sec-Configure_Port_Forwarding-CLI.html
Try this:
firewall-cmd --zone=external --add-forward-port=port=80:proto=tcp:toport=<application port>

You require have root permissions for configure firewall.

Regards,
Nik
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4. Re: Want to use Port 80 for Java Application

Jamsher Jun 17, 2020 3:38 PM (in response to Jamsher)

Hi Nik,

I provided sudo privileges to my application user ucas_build, Now working fine. But also if you have handy commands on how to configure firewall to redirect traffic, Please do share with me, Thanks

Best Regards
JAmsher
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5. Re: Want to use Port 80 for Java Application

Jamsher Jun 17, 2020 3:40 PM (in response to Nik)

Thanks Nik, Yes i do have root access.
I will try this also as i have time to test , We are migrating our application from windows to Oracle Linux.

Best Regards
Jamsher
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6. Re: Want to use Port 80 for Java Application

Dude! Jun 17, 2020 6:51 PM (in response to Jamsher)

JBoss combines the Apache web server with Tomcat. Usually the web server (httpd) is started as root in order to bind to port 80, after which it changes the UID to a non-privileged user to serve connection requests. There should be plenty of FAQ and online documentation. You will certainly want to avoid that someone could potentially break your web server and use it to gain root access.
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