you NEED to learn Port Security…….RIGHT NOW!! // FREE CCNA // EP 14
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- เผยแพร่เมื่อ 21 พ.ค. 2024
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This is CCNA Episode 14. Port security is a VITAL thing we must learn when becoming network engineers, especially when you have hackers running around using things like the Shark Jack from HAK5. In this video, I’ll show you the best practices for securing your switch ports on Cisco Switches and Unifi (Ubiquiti) switches.
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0:00 ⏩ Intro
1:24 ⏩ DISCLAIMER!!
1:43 ⏩ how i can HACK your switch (SHark Jack)
4:07 ⏩ What the Shark Jack needs
4:27 ⏩ STEP 1 - Shutdown your ports (unused)
7:00 ⏩ STEP 2 - BLACKHOLE VLAN!!
11:57 ⏩ STEP 3 - Port Security
13:32 ⏩ How to configure Port Security
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MAC's are easily cloned. Which is why you need to pair up port security with 802.1x machine certificates
He mentions that at 21:19
Hey Chuck please complete this CCNA series...
I have started to see all your CCNA video.. it's fun to learn.
give up with CCNA and get to learn Mikrotik Router OS, 1000 times better and easier
@@mrnmrk6191 can you talk a bit about why it is better? just curious
@@mrnmrk6191 are you in the network berg chat often talking about MTKs? If so we have talked. I concur that Mikrotiks rock and def easy to learn, but the certs are harder to get and require a lot more. The CCNA is more widely accepted and currently respected, so while MTKs rule and I love them and use them myself on a few networks, I would not say the CCNA cert is something one should give up, some of the tik language, and most of other routers, are based on cisco so all around a good cert, it is better than a network + for sure. Once Mikrotik makes their certs affordable and not a required class to get it, then will jump on that cert wagon lol
The most common approach is: a lock on the doors and security personnel
The next step is authentication of each deive on the port 802.1X.
The next step is IPSec.
This series has been massively helpful. I know you are crazy busy running a community and a business, but I would really love to see this series completed
You can spoof Mac addresses. So if you unplug a Pi from the switch, you might just take the Mac of that Pi and the mac filter is irrelevant. This is an inconvenience for the attacker, but be careful not to overstate the gained security there. Mac addresses are often just written on devices, otherwise just plug it into your own switch and read the mac from there. Furthermore, in a real life scenario, you run in a huge problem if an attacker gains direct physical access to the switch, but I guess everyone is already aware of that ;)
Overall nice content, thanks!
sticky ports my friend
@@rob7328 802.1x*
Security is all about layers. Usually when a device is hard linked to a port it provides a certain service. Sure you can spoof the mac address, but for a network printer I can disable most networking. I only have to open certain ports and when you spoof the MAC address, you can only do things that the device could, but nothing more.
I'm an old-school administrator. By default I block/deny everything and than I open up the things I need. It is not user friendly and when something needs to be connected, I takes some time (sometimes several hours) to setup everything. This concept is working for me for over 25 years going back to my Netware days.
Given enough time, opportunity and resources everything can be hacked. If someone is specifically targeting you, there is usually very little you can do about that. But by securing your switch in a proper way, you can guard against 99% of the attacks out there...
not to mention that in his example, the sharkjack has already cloned the MAC of the existing raspberry Pi. which makes his example terrible.
@@mathbee It's not cloned. The last two digits of the MAC were indeed different. The Pi was d9, the sharkjack was a9.
I think you do a really good job when it comes to fast paced dictation, most people stumble over their thought processes or skip steps, you stayed on track the whole time while making it enjoyable to learn. I wish all IT channels were as entertaining and captivating as yourself when it comes to teaching new users. Keep up the good work sir, subbed.
Thank you for doing it this way! Learning how to do the stuff is one thing. But seeing what its like "being attacked" looks like and blocking the attack looks like!
Hey Chuck, First.... I love your channel and your teaching style is superb! Second, When do you think EP 15 might be coming? I'm hungry for more !
You're *REALLY* better than education channels. Thanks for information maan
1000%
I'm 3 months into getting my bachelor's in cybersecurity. So glad I found your channel. You explain things very well and it helps me out. Thank you.
Thank you for popping up in my feed today!
I have been slacking off on studying and pushing my way into the IT universe after getting shot down after 4 rounds of interviews for my first IT job. But your videos do a great job of keeping me on focus and how fun it can be!
Thank you much and I appreciate all your work on your channel!
@14:03 If you’re gonna blur out your switch’s IP address, you should probably blur it out completely… ;)
Wouldn’t you have to be connected locally to do anything with that IP?
@@tnet1516 any insight into the internals of another network can be of use. especially being his core switch.
@@AngryMarkFPV I definitely see it not being ideal but I believe even the DoD doesn’t label IP addresses as anything other than unclassified unless combined with subnet mask and maybe even something else.
@@AngryMarkFPV Not really. It's a private IP address and without knowing the inside global address there's not much you can do with it. Even then there would have to be some NAT/PAT for that address as well. Which raises the question why he even blurred it to begin with.
@@jolss0 its a best practice. @AngryMarkFPV said it the best, any insight to his network could be dangerous. We also don't know how often his network comes under attack, how much info somebody has collected etc.. Just better to blur it out.
I absolutely love everything about your content! Just how clean your explanations are and how much detail you go through using visual aid. As a visual learner, your videos are absolutely Paradise to me! Also, your comment about being in a black hole with no friends and you're sad reminds me of Loki when he says, "Yes, very sad...Anyway..." LOL!
Chuck, a good tip with working on multiple ports at once in cisco is interface range then you can put the range of ports you need to change and do it all with one command
Would love to see more of this series. I have found it really interesting and really enjoy the way you present the information.
I love this!! I have to work with customers all the time where I have to tell them, "I'm gonna send the ticket to the network team and tell them to do a shut/no-shut on the port." I had an *idea* of what was going on behind the scenes, but it's so stinking cool to see it play out on screen like this!!! Thank you so much for what you do!!!
I need to configure port security on a Cisco switch this week and you just happen to have a quick tutorial. Perfect! Thank you.
Loving this free CCNA course you've been doing. The way you talk about it you can tell your passionate and it makes it much easier to watch. Will you be doing a video on configuring IP addressing for data center's/offices?
Port-security is for small installations only. As you mentioned in the end of the video, much better ways are 802.1X (or MAB for dumb devices). I am in the RADIUS database - I get access to a VLAN I am assigned to. I am not - I don't get access at all being dropped to quarantine VLAN. Simple, flexible and can be handled by a small number of engineers in a large network. Profiling by Cisco ISE/FortiNAC/etc. is a next-gen feature but a bit expensive.
I work for a large company with many thousands of network devices, and we still use Port Security. Although not for security purposes per se, we mainly use it for stopping the usage of unmanaged switches on the network.
@@diablo4223 we have about 600 switches. Why not to use single-host or multi-domain auth mode? They also limit the number of devices that can authorize on a single port.
I'm currently in OS Software and computer hardware, and Networking, but security is next once I re-learn all the stuff I forgot in my 20's. Can't believe how much I still know and is actually still relevant some 10+ years down the line. Did port security and observation old-school for so many years, a keychain shark seems too easy. I want one!
Dude, there is no one, absolutely no one on youtube with better network related content. I do hope you are getting rich from it and thank you, thank you a lot
This was really interesting, parts of this I used for years, other things I had little knowledge about but you explained those things in a level that I understand. I not work with it, just an nerdy hobbyist.
With your videos I have to rebuild my home network and play with the security stuff 🙂
Keep up the good work
As a 35 plus years network admin I really like the way you present this topic. It’s making me enthousiastic about my job all over. Thanks for that!
Try it at 63, jaded to the max...Chuck is inspiring I agree
This video right here got me into the it "space" 1 year ago during covid, now im almost done with my A+ and going to start my linux+ soon. Love you chuck...
Chuck, I don't know how you do it but I've been going to school for IT for about 2 years now and every time i start a new class you cover something about that subject. Thanks for your guidance you make some of the subjects easier to understand!
Watched this the day you uploaded it and was baffled. Committed to studying CCNA in the meantime and I’m sponging what you’re spilling here. Thanks
Thanks man, Cisco auto learning makes it soooo complicated to digest while your course is easy to follow and understand!
I have been doing networking for about 6 years, but never got a CCNA. Never thought I could do the cert. Your videos make me think I can. Thank you and keep doing the fine work you do
What did cert did you use to get your current job?
Natural born teacher. I love the way you teach. You make hard things look easy.
Your videos make the seemingly daunting task of playing with the CLI on a Cisco switch surprisingly easy!!! Thank you.
You explain everything so nicely. I have never understood this concept before you.
what a kick ass series man thank you so much for these! looking forward to the next video!
I personally didn't learn anything new, but this was a good episode. I've never heard blackhole VLAN, everyone I've met in the industry for me personally has called it a quarantine VLAN. Port security is very important, thank you for sharing with everyone!
You are such an underratedly effective teacher of this stuff
Nice flex on your Cisco skills. Loving this content! Thanks for putting this together. Cisco VLANS next??
Keep these babies coming! Thanks for the videos!
I'm glad that you give use the run down and course for free so at lest we have some knowledge of how to secure a port
I love your content! I currently work in IT and you make me want to be better!
favorite dialog of chuck : Let,s hack youtube today ethically ,off course🔥🔥🔥🔥😂😂
Looking forward to the next episode. Glad your brother will be helping out now!
Thank you man this is good content .. im following network engineering and cyber security degree ..these videos good for studies and for additional knowledge ..keep up the good stuff
For future readers. NMAP is not an attack. NMAP is a type of active enumeration, and there are a lot of legitimate use cases for the usage of NMAP in network/system operations. Including debugging.
I had originally thought this too. I suppose in the context of nmapping someone elses network unauthorized, it could be considered an attack, but I agree with you on this one.
Hey Team!
I've noticed this is the last episode of the series and there's more.
Love these episodes as I'm looking to take my CCNA.
Thank you!!
all the best champ
Great video as always, wish you would have covered "errdisable recovery cause all" saving the babysitting of having to shut, no shut ports to recover from err-disable. Maybe you'll get into that in a future episode. Looking forward to spanning-tree and DHCP snooping trust. Well done.
This is all great info, your content is awesome! One thing I might add though: If you unplug the raspberry pi and plug it directly into the shark jack, the shark jack can clone the RPi's Mac address, which would allow the shark jack to bypass port security by providing the same Mac address as the legitimate raspberry pi.
Hi Chuck , I'm a huge fan and get very excited whenever your video comes
I love this video. Great job explaining. Keep ‘em coming
Dude i love ur vids, from a tutorial stand point and just watching to learn topics or just enjoy to
them.
You can message our support team on Instagram @Networkchucksupport if you are interested in learning more
I ordered a Shark Jack recently and I'm super stoked to test it out on some ethical plugs, look pretty awesome.
Shark jack is pretty cool, can't wait for the rubber ducky vid tho 😁👍
What an awesome video, super entertaining while also informative on the topic. Looking forward to your next CCNA videos!
I had old port servers from like 1998 that were Linksys that I went through and learned alot!! Especially after I revamped them on today's newer 5G network back in 2012 when I was re mapping digital security infrastructure and tracking finances.
more ccna i been waiting the longest
"Put it in VLAN 666!"
That comment has earned you my sub! Also, thank you for teaching this. Physical security is one of the things that I love seeing at the places I've worked (and hate when there is none). I've seen switches plugged into wall jacks that were left out in the open and since earning my BAS in IS&C, that is vexing!
Also "swi po mac sticky" is a great command to run on cisco ports to ensure that no "new" devices get swapped for the one that is set for the port!
but he didn`t name the vlan, im suffering..
And pls keep on making such videos...NEVER STOP !! AWESOME CONTENT
So good, dude. You're an amazing teacher.
Chuck for president! Subscribed love the vibes and content
Awesome learning CCNA. Lets continue. Thanks for privacy and port security.
Awesome my man. First video I've seen by you and I love the delivery. I use this often to limit those tinkerers that are often hired. This is an important tool to know about.
Thank you for the course! Will you proceed with it ? Will we get new EPs ?
I know like nothing talked about in any of your videos but I have amazing interest in cyber security and everything you talk about
Contact our support team on Instagram @Networkchucksupport to join our tutorial classes
This was one of your more useful videos that I've watched; more advanced content plz!
Has this series finished ? It has been 4 months since the last video 😔😢
Seriously .. you're the best instructor I've ever seen 🌹👍
Hope you complete the series very soon 😊
I love chucks videos every one is a learning curve great content chuck
Great video! Exited for more videos in this course! When will more videos in this course come out? ;-) Cant wait
Chuck, A couple quick questions about the Shark Jack,
1. Where dies it get its power? Is it PoE or does it have a battery?
2. Could you have it grab MAC addresses connected? Like use a coupler, grab the mac(s) of a device/cable you are unplugging, then spoof that MAC via a script config?
BTW: I love your videos, i have been digesting your whole channel and your way of teaching is similar to my own. It is obvious that you love and live what you do. Keep it up.
I really enjoy your videos, I can appreciate you taking the time to explain in details.
This is actually a really great series :D Already done CCNA but the refresher doesnt do any harm - even learnt a few new stuff! Eagerly awaiting the rest of the episodes
you and me both buddy. Wanna hangout and discuss notes
Same. Got the CCNA and studied arse off for it, but these trainings are super helpful. Studying a cert really doesn't bring these things home.
This is pretty awesome. I understand the process and how to do it but the Cisco syntax is not something I use often so it's very hard to get it to stick. Plus, the Privacy VCards is a great idea to protect your identity and not have your primary card set up for automatic payments when you don't know if you can cover something you may have forgot about.
Another cool thing you can use the Shark Jack for is making a rogue DHCP server. This is good for learning how to configure DHCP snooping and dynamic ARP inspection.
any tutorial on that topic that you can share, please?
These videos are superbly executed and keep me interested in the topic, more than I already was. Bravo
Loved it! Excited for more videos😁
Love these videos and I'm learning a ton and applying to my home network. When will there be an episode on trunk port security?
@NetworkChuck - Thank you for all your videos - you really have re-inspired me to get my homelab set back up. I'm now running an ESXI which I never thought I could do - THANK YOU
Thanks for recording these vids in double speed, which allow me to play them at 4X 🤣. Jokes aside, I like your enthusiasm about tech, and how you’re excited to share what you know. Now lemme grab a coffee before I finish this episode!
Another excellent video great work looking forward to the next video
Why have you left us in the middle of this CCNA journey! It's been 2 years we are still waiting for EP 15!!
not sure about EP15 or others, but his page has this playlist for the entire free ccna course: th-cam.com/play/PLIhvC56v63IJVXv0GJcl9vO5Z6znCVb1P.html
With sticky mode, if you don't write the config, a reboot erases the learned MAC and you can plug any device in. Also good practice to give your VLANs a description, especially when doing very large networks.
Hey Network Chuck, I hope you can start working on this course again. This course is extremely valuable!!!
If someone has physical access to your network, it's trivial to unplug a device, look at the MAC address on the label of the device and spoof it in the interface settings of the attacker's device. Port Isolation and ACLs is the correct way to secure a switchport.
Love this video. I practiced with Cisco Packet Tracer
This is especially important for residential homes that have multiple Surveillance cameras outside house that can easily be knocked off to gain network access. Best practice dictates having multiple cameras recording other cameras in case they get vandalized.
Awesome Chuck can't wait for new episodes thanks brother.
Finally a CCNA video. Chuck please answer this question. Is CBT Nuggets CCNA and BOSON courseware enough study material to know about the contents ?
Since we barely change anything in our office, and everything is labels, and the Server room does allow this:
All the non used Ethernet plugs are just not connected to anything. The connection on the patch pannels are emtpy, only the ones with a Device normally being on the plug are actually connected in the Server room
Your videos make my day
i know nothing about this sort of thing, but i think its amazing how you can remember so many commands.
Great video Chuck :-) I working with cisco router everyday since they are pre config to our customers we don't need to do much but just watching that video has helped me a learn a lot :-)
Thanks for the great video. Keep up the good work!!
Your method is great man!
Amazing 😍 wish you all the best ❤
Chuck your giveaways make's us a dedicated hard working person cause it includes lots of work to participate .....😅
Love your office!
Great t-shirt! Great video!
Thanks for the amazing content brother. Any chance you're able to tell us when this course might end and in how many episodes?
Your the man, thanks for the lessons dude! you Rock!
"Golden Snitch" What a fantastic name for a Switch!😂
Chuck being a Potterhead
Golden Snitch, Golden Switch
@@just_some_bigfoot_hacking_you bot
@@just_some_bigfoot_hacking_you bot
@@just_some_bigfoot_hacking_you bot
Appreciate the series! Please continue!
This series is the best thing ever KEEP GOING! 😁
next video needed Thanks Chuck!