How to access application in tomcat?

Question

Java

Hello, I installed tomcat 9 on a virtual machine running Ubuntu 16.04 , I
open the address of the virtual machine in the browser, the tomcat main page opens. Through it I try to open:

• server status
  
• manager app
  
• host manager
  

I get a page
403 Access Denied
Next, I went to the address: I wrote the
/opt/tomcat/conf/tomcat-users.xml
following there:

But the 403 page remained the same, the server rebooted, it does not help.
As I understand it, these resources are available only from the local machine. How can I get there from outside?
Thank you very much in advance!

Answer 1

In /opt/tomcat/webapps/manager/META-INF/context.xml find

<Context antiResourceLocking="false" privileged="true" >
    <Valve className="org.apache.catalina.valves.RemoteAddrValve"
           allow="127\.\d+\.\d+\.\d+|::1|0:0:0:0:0:0:0:1" />
</Context>

allowand add the ip address from which you are connecting to the attribute .