3.3.7 Importance of Denying Hosts

 

Julianne Noone

 

1104 Teaching Tech: 3.3.7 Importance of Denying Hosts

 

For my topic I choose to describe domain 3.3.7 which is Importance of denying hosts.  I choose this because I want to know why denying host are beneficial. For some background information a host is a hardware device that permits access to the network via an internet connection. For instance, a computer could be considered a host from the IP address.

Only certain hosts, or users, will be allowed permissions when the host pair matches an entry in the /etc/hosts.allow file. Just as access is granted there are times when access is denied for the user or host when pair matches an entry in the /etc/hosts.deny file. Typically host on different levels such as websites, will be denied so that people cannot access them while at locations, such as school or work. Another reason certain accesses are denied by the host is because administrations wants to monitor the traffic control. By monitoring access denied by the host, the network is essentially safer from attacks of malware.

To be able to edit this information in the Linux System you need to be a superuser and have access to the terminal. While in the terminal you will need to use the following command: $ sudo nano /etc/hosts . Also, you will need to match the host, likely by the IP Address, and deny access where you do not see fit for particular users.

 

References

https://linux.die.net/man/5/hosts.deny (Links to an external site.)

https://www-uxsup.csx.cam.ac.uk/pub/doc/redhat/redhat8/rhl-rg-en-8.0/s1-tcpwrappers-accesscontrol.html (Links to an external site.) 

https://vitux.com/linux-hosts-file/ (Links to an external site.) 

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