Understanding Firewalls: Your Digital Guardians Against Cyber Threats

I've been super busy , so I apologize , for I think I didn't put anything out in July so , but good news is , we're in season number four . Can you believe that ? Guys ? Thank you so much for bringing this platform having legs and being able to sustain such a long time . I'm grateful to all my fans , so thank you , thank you , thank you .

You know I was working on my doctorate in the summer , just got hammered with work . If anybody's ever worked on their doctorate , they know that it's a lot of work . It's still a lot of work . I'm not even close yet , but I had summer classes and stuff that I had to do . Also , I went to Europe so I was able to hit London , paris and Rome .

So just some downtime . So everybody needs that . So if I was there and you're from there and I missed you , hey next time . I loved Europe . It was a great , great time , got to see a lot of stuff . If you've never been to Europe . You should go take the , you know , go do the tourist stuff . It was absolutely fabulous . All right , firewall .

So what is a firewall ? Let's start with that . Computer firewall is a network security device or software application designed to monitor , filter and control incoming and outgoing network traffic , based on predetermined security rules .

The primary purpose of a firewall is to establish a barrier between a trusted internal network , such as your home or computer network , and potentially untrusted external network such as the internet . This helps unauthorized access , data breaches and other malicious activities .

Firewalls can be implemented at various levels , including the network firewall , host-based firewall application firewall , stateful firewall , packet filtering firewall and proxy firewall , and we'll be going over three of them today . Firewall uses rules or policies to determine how to handle different types of network traffic .

These rules can be customized to allow or block specific types of connections , services or application . A well-configured firewall is essential part of a comprehensive cybersecurity strategy , helping to protect your systems and data from unauthorized access and cyber threats . So let's go over the first one network firewall .

A network firewall is a security device or software application Remember because you have it , it could be software based . You have it on your windows that is specifically designed to monitor and control the incoming and outgoing network traffic at the network level .

His primary purpose is to establish a barrier between a trusted internal network , such as a corporate network or at home network , and potentially untrusted , like the internet . By doing it , it also helps prevent authorized access , data breaches , malware , infections and other cyber threats .

The key features of a network firewall include some of the stuff that we just talked about . Packet filtering . Network firewall inspects the packets of data as they pass through , making decisions based on criteria such as source and destination , ip , port numbers and and protocol types . It can block or allow packets based on predefined rules .

So if you want to block , you know port 80 , you can , you know . If you just want to block , let's say , gambling sites , you can . If you want to block you know a website , you can , you know . You just got to go in there and put the rule on Stateful inspection .

A firewall tracks the state of active connections and uses this information to make more informed decisions about allowing or denying traffic . This approach helps prevent certain types of attack that might otherwise be difficult to detect with simple packet filtering . Proxy servers some network firewalls access proxies handling requests from internal users to external resources .

They can provide additional security by masking the internal network structure and filtering potential harmful content . Intrusion detection and prevention Many modern network firewalls includes intrusion detection and prevention features . These systems can identify suspicious activities and , in some cases , automatically block or mitigate the threat .

Logging and reporting network firewalls often generate logs of network traffic which can be reviewed for analysis , compliance and troubleshooting purposes . Reporting features help administrators understand the network security posture and not . It also does not network , or you know it could do that .

Network address translations firewall can use that to change the source or destination IP address of packets as they pass through the firewall . This can help obscure the internal network structure . Network firewalls can be implemented along using dedicated hardware , appliance or software running on general purpose hardware . They are typically placed at the network perimeter .

I think , as the first line of defense against external threats , configuring the firewall rules is critical to ensure that it allows necessary traffic while blocking unauthorized or potentially dangerous traffic . Additionally , network firewalls should be regularly updated to stay current or emerging threats . They have a host-based firewall , also known as personal firewall .

It's a software-based firewall that operates on an individual computer device . Unlike network firewall , which protects an entire network at the perimeter , host-based firewalls focus on protecting the specific device on which they are installed .

The primary purpose of a host-based firewall is to monitor and control the traffic to and from that particular device , providing an additional layer of defense against unauthorized access and malicious activities .

Key features and characteristics of a host-based firewall includes traffic controls host-based firewalls control incoming and outgoing network traffic on the specific device they are installed . They can block or allow connections based on predefined rules and configurations .

Application filtering host-based firewalls often have the ability to block specific applications or services from accessing the network or the internet . This can be useful for preventing unauthorized application on known malware from communicating over the network .

Granular rule configuration users can customize the firewall rules on a per-device basis , allowing for more fine-grained control over which connections are permitted and which are blocked .

Protections against local threats host-based firewalls can provide protection against threats that originate from within the same device , such as malicious software attempting to establish an unauthorized connection . User notifications many host-based firewalls provide notifications to the users when the connection attempt is blocked or when suspicious activity is detected .

This can help users become aware of potential threats and take appropriate actions . Operating system integration host-based firewall are typically integrated with the operating systems , allowing them to monitor network activity at a lower level . This integration can make them more effective at a blocking unwanted traffic and personalization .

Host-based firewall can be customized to meet the specific security requirements of the individual user or organization . Host-based firewalls are particularly useful for laptops , desktops and servers , as they provide an extra layer of defense for devices that may connect to various networks , including public Wi-Fi , home networks and corporate network .

It is important to note that host-based firewalls are not a replacement for network firewalls . Both type of firewalls can work together to create a more comprehensive security posture . Proper configuration and regular updates of host-based firewall , as long as anything else that you have , are essential to maintaining its effectiveness against involving threats .

Application firewall , also known as web application firewall , is a specialized type of firewall that focuses specifically on protecting web applications and services . Its primary purpose is to monitor and control the traffic between web applications and the clients , typically web browsers that access them .

Application firewalls are designed to identify and mitigate vulnerabilities and threats that target web applications , making them a critical component of web application security . Key features and characteristics of application firewall include layer 7 filtering . Application firewalls operate at the op application layer or the layer 7 of the OSI model .

This allows them to inspect and analyze the content of HTTP slash ATTPS requests and responses , enabling them to identify and block specific type of attack targeting web applications . Protection against web application attacks .

Application firewalls are designed to defend against a wide range of web application attacks , such as SQL injection , cross-site scripting , cross-site request forgery and other attack vectors commonly used to exploit vulnerabilities in web applications .

Row-based filtering like other types of firewall , application firewall uses rules to determine how to handle incoming and outgoing traffic . These rules are designed to detect known attack patterns or abnormal behaviors and take appropriate action , such as blocking or learning .

Positive and negative security models application firewalls can operate in a positive or negative security model . In a positive security model , only explicitly allowed behaviors are permitted , while in a negative security model , no malicious behaviors are blocked .

Security policies application firewalls allow administrators to define security policies that govern how web traffic is handled . These policies can be customized based on the specific needs of the web application . Logging and monitoring application firewall generates logs of web traffic , attacks and other relevant information .

Dislogging is essential for security analysis , compliance and incidence response . Virtual patching and application firewall can provide virtual patching by blocking requests that are known to known vulnerabilities . To exploit that exploit known vulnerabilities in web applications . This can be critical in situations where immediate patching of the application is not feasible .

Application firewalls are commonly used to protect web servers , apis and other web-facing resources . They provide an additional layer of defense along secure coding practice and regular security assessments for web applications .

Proper configurations and maintenance of the application firewalls are essential to ensure that it effectively protects against emerging threats and vulnerabilities that will put a bow on firewalls for today . Another thing I want to talk about is trying to build this community up more .

I know , in the summertime it's a little bit tough because everybody is busy and everybody goes on vacation , just like I did . People have their own things to do . I think , now that it's past Labor Day , this is kind of like a reset for a lot of people who want to use IT , and specifically CompTIA , to change their lives .

They may be people who maybe took an exam but never took the exam , or took the class and never took the exam , and maybe now they decide , hey , listen , summer's over , now it's gonna be the time to buckle down and finish what I started .

If this is something that , if you see yourself like this , as someone who kind of like wants to get over that hump , yeah , I kind of wanna do like a whole question answer sessions . I don't know if I should do it through WhatApp or through Zoom .

You know there's a guy who does it , for he teaches anti-money laundering and he does everything through WhatApp , but he's in another country when he does it and he does like these two three hour sessions on anti-money laundering .

This is apparently there's a certification for it , and I kind of wanna do the same with A plus number , plus security , plus cloud , plus , whatever it is that you guys wanna do . But I kind of need more input from you guys , right ? Is this something that you're interested in ? Is this something that you're willing to do ?

You know it's Sunday , like in the afternoon a good time , or you know or Sunday morning a good time .

So we , you know we can take an hour and just like run through questions or if there's questions that you have maybe you've taken the test a couple of times and have failed and you need to get over that hump right and we can do some go-overs , like a specific topic . If you having an issue with printers , we can go over printers .

If you having an issue with hard drives or RAID , we can go over that . You know , I just wanna be able to . Again , I just wanna help , right , my goal is to help people pass , because you can make a decent living in IT , right , and I just wanna be able to help you guys . You know , over the hump and I know there's people that need help .

You know I get emails with people helping me and I can see when people log in into my website . You know , and you guys are from all over the , not only from the US , but I got a , you know , all over the world . I got people in London . I got somebody in South Africa who's been logging in almost every day , shout out to you .

You know , I just , we just want to help , right , that's all I want to do . So if this is something that you're interested in , please email me and , you know , let me know that . Hey , listen , I want to help . I need help passing the exam . I Don't have any issue with that . I just want to .

You know there's platform to grow and and and for us to , you know , to be able to help you . We want to . I want to be able to help Everybody who wants help . We need to help who wants me to help them . But I kind of want to do . I Myself kind of want to do a better job of how , of how I'm doing it .

Yes , this podcast is is one form of how I can help you , but I kind of want to do it Another way . Right , if we can do a zoom class , right ? Or you know all through what tap , I'll be more than happy to do that . You know , an hour a week or every other week , right ?

Or if you just want to , you know , oh , you know , this week we're just gonna concentrate on people who want to take a plus , right , and join me 10 o'clock on a Sunday am and Then I'll throw like 20 questions at you and then you , you know , you try to figure out , we'll go over it , right , you know , and we'll try to find out what are your deficits and

what are your strengths . Right , if you failed the exam and you want to send me your , your exam and tell me what your , you know , why you failed , you know it's , it's . You know we can help each other . And if you , you know , if you practice exams , I can say you practice exams , I'm always Waiting to do that All you have to do is email me .

You know , let's just build this community . This community needs to build more and you know we need , we need to help . You know I want to help as many of you guys as possible Because I know I'm not too long ago I was in that chair .

I was sitting there , where you are you , you know , if you're listening to this , it's not that long ago that I was where you were at and , you know , looking to change careers and , you know , looking to make more money . To be honest , make more money .

We all want to make more money and you know , I Know how it feels , especially when you get older , right , and then you feel like , oh , I'm getting older . Maybe you know this is not for me or maybe I should do something else . You know I've been in IT for a long time , but I've only been in academia short time .

So I went from being a tech to being a college professor in a it . It happened so quick , right so , but I've had a lot of people who helped me along the way , and that's my motivation is to get back and to help people . You know , because there's people out there who helped me . So I kind of want to help you guys . So you guys

need help . Please , please , please . Do not hesitate To email me , right , professor J rod at gmailcom . You know I kind of want to . I don't really want to do like I want on one thing . I kind of want to do like a five on one thing or a ten on one thing , or even a 20 on one thing and just like go over questions .

You know , maybe We'll do like every other week , one hour a plus one hour network , plus one hour security , plus one hour cloud plus . You know we can do that , but it's up to you guys . You have to email me and say , yes , I'm interested , yes , I'm interested , yes , I'm interested .

If I get enough people who email me and tell me that they interested , I will do it . Right , I will do it and I will let you guys know , because this is again , this is something that I really really Want to do , because I want to . It's time for me to get back . All right , that's gonna put a ball on it today . Thank you so much for listening .

Look out for another episode . Really , this has been a presentation , a little chance of productions are by Sarah Music , by Jay com . If you want to reach me , you can email me at professor Jay rod at gmailcom . I'm also on Instagram , professor Jay rod , and Till next time .