6tunnel software package provides TCP proxy for non-IPv6 applications, you can install in your Ubuntu 12.04 LTS (Precise Pangolin) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install 6tunnel
6tunnel is installed in your system.
Make ensure the 6tunnel package were installed using the commands given below,
$ sudo dpkg-query -l | grep 6tunnel *
You will get with 6tunnel package name, version, architecture and description in a table
| Distro | Ubuntu 12 04 lts precise pangolin |
| Section | Network |
| Package | 6tunnel |
| Version | 0.11rc2-5 |
| Description | TCP proxy for non-IPv6 applications |
| Sub Section | Net |