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COIT20262 - Advanced Network Security: Assessment Item 2

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What is Https and its purpose in Virtnet?

Hyper Text Transfer Protocol Secure (HTTPS) is termed to be as the secure version of HTTP protocol over which the data is sent between the browser and the website to which one user is connected. The ‘s’ at end of HTTP stands for secure as it means that the entire communication which will take place between the browser and website must be encrypted. Mainly the purpose of HTTPs to be used over computer network for secure communication by help of communication protocol which is encrypted by help of Transport layer.

The main principle for HTTPs is authentication which is practiced while accessing of website and protection of privacy and integrity of the data which is exchanged while the processing of communication among the network. The use of HTTPs within also helps in prevention of man-in-the-middle attack. It is also termed to be as bidirectional encryption of communication which takes place between the client and server. HTTPs is also responsible for providing a reasonable assurance in which one is communicating without interference of the attackers within the website.

Authentication and Access Control

Authentication and Access Control is used for protection of data from unauthorized users and to control the access to administrative functions that are processed within the organization.


Authentication is referred to as a process by which system verifies the identity of a user who wishes to access the desired system . Authentication is based on the identity of user who request for access to a resource.

Authorization (Access Control)

Authorization is termed to be as a mechanism by which a system grants or revokes the right to access the data in order to perform various actions which are required by the system. It also helps in determining the operations which user can or cannot do by comparing the user’s identity with an access control list which is created.

Firewalls and iptables: What is Firewall?

Firewall is termed as a network security device which helps in monitoring of incoming and outgoing of network traffic and decides that whether to allow or block the specific based on defined set of security rules which are required. Firewall can be hardware software or of both types.

How Iptables Firewall works?

Setting of a Firewall is termed to be as an essential step which is involved in securing of any operating system which is used within the organization. Iptables is termed to be as a standard firewall which included in most Linux distributions by default. It is actually a front end standard for the kernel-level netfilter hooks that can manipulate the Linux network when required

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