XLAB Tech

I just noticed that all of a sudden no Java program can access network anymore.

After reinstalling a fresh Sun JDK, checking all policies and properties and proxies, none of which helped, I finally managed to ask the all-knowing One the right question.

It’s got to do with premature eja… erm … IPv6 exclusivity.

Checking this and this revealed the source of my woes.

Thus, running

# sudo /sbin/sysctl net.ipv6.bindv6only=0

and changing the setting in /etc/sysctl.d/bindv6only.conf fixed the problem.

This entry was posted on Thursday, December 24th, 2009 at 12:35 and is filed under fix, java, tips & tricks. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.