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Debian: No ipv4 connection within Java applications

Recently there is a very annoying setting within debian squeeze. It causes many java applications to not function anymore on ipv4. Basically this means a lot of programs like Eclipse and Netbeans won’t function at all when requiring a connection.

This can be fixed by editing the following file:

/etc/sysctl.d/bindv6only.con

You should see the follow setting:

net.ipv6.bindv6only = 1

change this to:

net.ipv6.bindv6only = 0

Restart your system and your apps should be functioning properly again.

It took me several hours to find this solution, so I hope posting another article helps other people in search of a solution.

Thanks for reading.

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