Skip to main content

Data security firewall 

What is a firewall?

A firewall is network security device or software that monitors incoming and outgoing network traffic, it permits, or blocks network traffic data packets based on a set of security rules . The purpose of the firewall is filter out any malicious traffic like viruses and hackers and tonight access to the viruses and hackers, and it will allow safe network traffic through such as the Internet.

By default, a firewall blocks all network traffic coming into the network it is protecting.  For the campus firewall this means that no traffic from the Internet can get on the Missouri State campus network without explicit permission.  To permit traffic through the firewall we create exceptions or rules that allow certain traffic on the network.  The rules are defined by the IP addresses of the sender and receiver of the traffic as well as the type of traffic e.g. web or SSH. 


Types of firewalls

Firewalls can either be software or hardware, though it’s best to have both. A software firewall is a program installed on each computer and regulates traffic through port numbers and applications, while a physical firewall is a piece of equipment installed between your network and gateway.

 

How does a firewall work?

Firewall carefully analyses incoming traffic to prevent attacks from unsecure or suspicious sources by filtering the traffic that has being pre-established by a set of rules. We have all heard of a port, the port is the entry point at a computer which the firewall guards’ traffic from, this is where information is exchanged we have external devices.  

A layer 4 firewall uses the following parameters for an access rule:

Source IP address or range of IP addresses

Destination IP address or range of IP addresses

Destination port or range of ports

Protocol of the traffic, TCP, ICMP, or UDP

Software based firewalls.

Windows comes with a free firewall installed called Windows defender firewall, if you have already got a Windows PC this would probably be the easiest way because it is already installed for you all you will need to do is go to your control panel in windows, then click on system and security, after you have clicked on system and security then click on windows firewall, and if the firewall is disabled you'll see a windows firewall marked off to turn it on click on the windows firewall on or off button .

Another good firewall software Is Norton 360 premium, with this package you get a smart firewall, a secure VPN, dark web monitoring, password management an online backup. To set up Norton is very easy you just download the software which doesn't take long and then you have to buy a key token to enable you to use the product. This is a yearly subscription. With Norton 360 it has a function next to the link you have searched in Google that will tell you how secure that link is before you actually clicked and enter the website. so if you are unsure if the website is unsafe or untrustworthy Norton will automatically give you a little hint.


Comments

Post a Comment

Popular posts from this blog

VADDAL RILEY HOME WORKOUT IN LOCKDOWN!!!

Viddal Riley is a up and coming boxer, he has had 4 professional fight and has won all 4 fights, he also fought in the under card of  Manny Pacquiao in Las Vagas on the 28/02/2020 leading the only KO of that night. Viddal also has a Youtube  channel where he posts quite frequently. He post about Boxing, Coaching, Music and challenges if you want to check it out here it is  https://www.youtube.com/channel/UC9BaJIXnYSyYalbCVfZTZ4A . He has put out a video on a home work out that you can do in the lock down here it is -- Warm up -- 5 mins Skipping at your own level Double jump skipping High knees skipping Ground work -- Sit ups -- x12 Dorsal Raise -- x12 Pike Sit Ups -- x12 Bur-pee Stand Ups -- x12 Thumb Touching Push Ups -- x12 Pike Sit Ups Alternative Legs -- x12  Squat Thrust -- x12 Abdominal Hold -- 25 secs Bur-pee Jumps -- x12 Finger Tip Push Ups -- x12 Elbow To Knee Sit Ups -- x12  Rest Warn Down Done! Here is the link if you need a demonstration :--   h
Post a Comment
Read more
  Data security week 6 blog Configuration of firewall and I had to keep your device safe using firewall There are many firewalls out there some that may cost money and some that are free today we're going to focus on zone alarm firewall. In this example I'll be using the free trial package for zone alarm usually zone alarm does have   annual costs fee for £54.95. Zone Alarm protect home users and small businesses from emerging cyber threats with the same next-generation technology trusted by the world’s largest companies, tailored to your needs. The ZoneAlarm Firewall protects your computer from most of those threats. It defines three security zones Trusted, Public, and Blocked. By default, the Public Zone works in High security mode, and the Trusted Zone works in Medium security mode: High security mode for Public Zone lets you connect to network resources but prevents other unauthorized network users and computers from accessing the resources on your computer and co
Post a Comment
Read more
  Data security week 7 blog   Why is Backups important   The purpose of the backup is to create a copy of data that can be recovered in the event of a system failure. System failures can be the result of hardware or software failure, data corruption, a malicious attack (virus or malware), or accidental deletion of data. Backup copies allow data to be restored  would provide the means of restoring to a previous point after the incident has been dealt with. Backups is a vital method of storing data and keeping it safe, when you take your time and set up a good backup strategy you can ensure that data can easily be recovered. Storing copies of data on a separate device for example USB stick, an external hard drive, A disk ah storage system, cloud storage or tape drive   can protect you against data loss or corruption. most of these devices need to be at the location of your PC or laptop When trying to restore but you can store the devices in a safe place until you need it of you
Post a Comment
Read more