This is a guide on how to install tcp wrappers in Ubuntu. Tcp wrapper is a host access control in Ubuntu, or Linux in general and other Unix-based system. You can say it is a simple firewall if you want.
Tcp wrapper used tcpd daemon to run the service. The fast way to install a daemon in Ubuntu is by using software package management aptitude. Aptitude is a high-level package management developed for Debian Linux. The upgrade steps are similar to apt-get command. You can see my previous post, Ubuntu aptitude upgrade for aptitude update and upgrade command.
Here is a step by step example of how to install tcp wrappers in Ubuntu using aptitude:
luzar@ubuntu:~$ sudo aptitude install tcpd
Reading package lists... Done
Building dependency tree
Reading state information... Done
Reading extended state information
Initializing package states... Done
Building tag database... Done
The following packages have been automatically kept back:
libbind9-30 libisc32 libisccc30 libisccfg30
The following packages have been kept back:
bind9 bind9-host dnsutils linux-image-server linux-server
0 packages upgraded, 0 newly installed, 0 to remove and 9 not upgraded.
Need to get 0B of archives. After unpacking 0B will be used.
Writing extended state information... Done
Reading package lists... Done
Building dependency tree
Reading state information... Done
Reading extended state information
Initializing package states... Done
Building tag database... Done
luzar@ubuntu:~$
That's it.
