isakmpd software package provides The Internet Key Exchange protocol openbsd implementation, you can install in your Ubuntu 16.04 LTS (Xenial Xerus) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install isakmpd
isakmpd is installed in your system.
Make ensure the isakmpd package were installed using the commands given below,
$ sudo dpkg-query -l | grep isakmpd *
You will get with isakmpd package name, version, architecture and description in a table
| Distro | Ubuntu 16 04 lts xenial xerus |
| Section | Network |
| Package | isakmpd |
| Version | 20041012-7.2ubuntu2 |
| Description | The Internet Key Exchange protocol openbsd implementation |
| Sub Section | Net |