IPSupport - IPv4: true
IPSupport - IPv6: false
preferIPv4Stack: false
preferIPv6Addresses: false
IA4LOCAL: /*.*.*.* <--- here is my ip
IA6LOCAL: null
IA4ANYLOCAL: /0.0.0.0
IA6ANYLOCAL: /0:0:0:0:0:0:0:0
IA4LOOPBACK: /127.0.0.1
IA6LOOPBACK: /0:0:0:0:0:0:0:1
config OpenAndConnect.setup(): success

...

test OpenAndConnect.dcOpenAndConnect(INET, /0.0.0.0, INET, /127.0.0.1): success
test OpenAndConnect.dcOpenAndConnect(INET6, /0:0:0:0:0:0:0:0, null, /0:0:0:0:0:0:0:1): failure
java.lang.UnsupportedOperationException: IPv6 not available
        at java.base/sun.nio.ch.DatagramChannelImpl.<init>(DatagramChannelImpl.java:183)
        at java.base/sun.nio.ch.SelectorProviderImpl.openDatagramChannel(SelectorProviderImpl.java:55)
        at java.base/java.nio.channels.DatagramChannel.open(DatagramChannel.java:188)
        at OpenAndConnect.openDC(OpenAndConnect.java:261)
        at OpenAndConnect.dcOpenAndConnect(OpenAndConnect.java:232)