Hi all, Can someone tell me how to diagnose this issue? I can't create a connection to another node using IPv6 because of the error below -- a short app demonstrates the problem. Everything I've found online so far is aimed at using IPv4 instead, but that's not my goal. This is on a Centos 6.6 virtual machine.
--- begin --- [root@TWO test]}> java -version java version "1.7.0_79" OpenJDK Runtime Environment (rhel-2.5.5.3.el6_6-x86_64 u79-b14) OpenJDK 64-Bit Server VM (build 24.79-b02, mixed mode) [root@TWO test]}> [root@TWO test]}> [root@TWO test]}> cat IPv6Test.java import java.net.InetAddress; import java.net.Socket; public class IPv6Test { public static void main(String[] args) { try { InetAddress ia = InetAddress.getByName("fe80::20c:29ff:fe98:9210"); System.err.println("Opening socket for: " + ia); Socket socket = new Socket(ia, 7800); System.err.println("We have: " + socket); } catch (Exception e) { e.printStackTrace(); } } } [root@TWO test]}> [root@TWO test]}> javac IPv6Test.java && java IPv6Test Opening socket for: /fe80:0:0:0:20c:29ff:fe98:9210 java.net.SocketException: Permission denied at java.net.PlainSocketImpl.socketConnect(Native Method) at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339) at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200) at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182) at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) at java.net.Socket.connect(Socket.java:579) at java.net.Socket.connect(Socket.java:528) at java.net.Socket.<init>(Socket.java:425) at java.net.Socket.<init>(Socket.java:241) at IPv6Test.main(IPv6Test.java:10) [root@TWO test]}> [root@TWO test]}> java -version java version "1.7.0_79" OpenJDK Runtime Environment (rhel-2.5.5.3.el6_6-x86_64 u79-b14) OpenJDK 64-Bit Server VM (build 24.79-b02, mixed mode) --- end --- >From this node, am able to ping6 the address fine: [root@TWO test]}> ping6 -I eth3 fe80::20c:29ff:fe98:9210 PING fe80::20c:29ff:fe98:9210(fe80::20c:29ff:fe98:9210) from fe80::20c:29ff:fec6:91a eth3: 56 data bytes [...] 2 packets transmitted, 2 received, 0% packet loss, time 1023ms I don't have selinux or a firewall running, not that I think that would matter since Java can't start to connect anyway from the message above. Thanks, Bobby