natlog software package provides Source-natting firewall logging utility, you can install in your Ubuntu 14.04 LTS (Trusty Tahr) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install natlog
natlog is installed in your system.
Make ensure the natlog package were installed using the commands given below,
$ sudo dpkg-query -l | grep natlog *
You will get with natlog package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Development |
| Package | natlog |
| Version | 1.00.2-1 |
| Description | Source-natting firewall logging utility |
| Sub Section | devel |