How to disable IPV6 stack on Linux Environment OS Level or Java Runtime Level

Environment: Linux (Debian)

root@HL7NEW:/opt/enlilHL7/bin# netstat -anp|grep LISTEN
...
tcp6        0      0 :::10750           :::*               LISTEN      22936/java
...

You can see that java process listens port on IPv6 stack. To change this to Ipv4 you can use two methods:

1. First method is to use JVM parameters for specific java application start.
   
   

   -Djava.net.preferIPv4Addresses=true

   
   
   
2. You can add parameters to sysctl.conf so that operating system disables ipv6 stack
   
   

   sudo vi /etc/sysctl.conf
   # add to last line
   net.ipv6.conf.all.disable_ipv6 = 1
   
   sudo sysctl -p
   

After restarting process you will see that:

root@HL7NEW:/opt/enlilHL7/bin# netstat -anp|grep LISTEN
...
tcp        0      0 0.0.0.0:10750           0.0.0.0:*               LISTEN      22936/java
...