Permission denied on ipv6 Socket in Java

Question

I have a strange problem on ipv6 connection.

I write down a simple client server in Java, it works perfectly in ipv4 but when I try to use it with an Ipv6 address I receive a "java.net.SocketException: Permission denied".

If I try to run on the same machine client and server it works with ipv4 and ipv6 as well so i think that is a OS problem.

Some informations:

Ping6 works between machines Iptables is stopped Os is RedHat 6.2

Any ideas? Thanks

Antonio

Answer 1

I found the problem. There are two firewalls running as default on RHEL. I simply shutted down the IPv6 iptables.

service ip6tables stop