The Top 15 Network Protocols and Ports Explained // FTP, SSH, DNS, DHCP, HTTP, SMTP, TCP/IP

Рет қаралды 84,740

Күн бұрын

If you are learning networking, these are the top protocols and port numbers you will NEED to know. Good for the CCNA, Net+, Sec+, CEH, Pentest+, or that pesky interview you need to ace.
Download the pcap here and follow right along:
packetpioneer.com/wp-content/...
== More On-Demand Training from Chris ==
▶Getting Started with Wireshark - bit.ly/udemywireshark
▶Getting Started with Nmap - bit.ly/udemynmap
== Live Wireshark Training ==
▶TCP/IP Deep Dive Analysis with Wireshark - bit.ly/virtualwireshark
== Private Wireshark Training ==
Let's get in touch - packetpioneer.com/product/pri...
Thank you to wiki.wireshark.org/SampleCapt... and Johannes Weber for the pcap samples that I was not able to create on my own!
For professional inquiries please contact me at packetpioneer@gmail.com

Пікірлер: 108

@KaySwiss21 2 жыл бұрын

Can't wait to watch this video in full after work today!! Some of the best cyber security/networking content on KZfaq!

@ChrisGreer 2 жыл бұрын

Thanks Caleb!

@Shalom_Mike 2 жыл бұрын

Thank you, Chris! Ever since I watched you on David Bombal's channel, I have become a fan of your teaching style. I am a Systems Engineer and you have greatly helped my understanding of the network side.

@JeffreyHandy 2 жыл бұрын

Same here. I’m learning way more than I was - thank you!

@emmanuelmotsi Жыл бұрын

same here!

@KellenBegin 2 жыл бұрын

thank you for your great content. not just explaining but showing examples with wireshark!

@yeayea8334 2 жыл бұрын

0:48 FTP 4:25 SSH 5:56 Telnet 9:01 SMTP 12:24 DNS 14:18 DHCP

@user-fq3cg9jo5d 4 ай бұрын

Here is an outline detailing each topic and the actions taken in Wireshark from the video: I. FTP Port number: 21 Actions: Filtered for "ftp" to only see FTP payload packets (33 packets) Filtered for "tcp.port==21" to see TCP handshake/overhead packets too (101 packets) Showed login and password in cleartext Showed example of port scan at end of FTP conversation II. SSH Port number: 22 Actions: Filtered for "tcp.port==22" Showed encrypted traffic after initial version request info III. Telnet Port number: 23 Actions: Filtered for "tcp.port==23" Showed cleartext data with ASCII interpretation Used "Follow TCP Stream" to view client-server communication IV. SMTP Port numbers: 25, 587 Actions: Filtered for "tcp.port==25" Showed cleartext and StartTLS encrypted examples V. DNS Port number: 53 Actions: Showed need to use UDP instead of TCP Showed DNS request and response VI. DHCP Port numbers: 67, 68 Actions: Filtered for just "dhcp" Showed discover, offer, request, ack flow VII. TFTP Port number: 69 Actions: Showed read request for file VIII. HTTP Port number: 80 Actions: Filtered for "tcp.port==80" Showed GET request and web server response in cleartext Used "Follow TCP Stream" to view web banner IX. POP3 Port numbers: 110, 995 (TLS) Actions: Filtered for "tcp.port==110" Showed login info in cleartext X. IMAP Port numbers: 143, 993 (TLS) XI. NTP Port number: 123 Actions: Filtered for just "ntp" Showed NTP client-server communication XII. SNMP Port number: 161 (UDP) Actions: Filtered for "udp.port==161" XIII. LDAP Port number: 389 Actions: Filtered for "tcp.port==389" Showed simple LDAP login XIV. HTTPS Port number: 443 Actions: Filtered for "tcp.port==443" Showed initial client hello in cleartext XV. SMB Port number: 445 Actions: Filtered for "tcp.port==445"

@benjamindeporte3806 Жыл бұрын

Great content - simple to understand, but yet lots of good information !

@nathanprisbrey792 2 жыл бұрын

I love the tests that you gave as you introduced each different protocol -- very entertaining!

@louisvarre2197 2 жыл бұрын

Incredible lecture! I’ve been studying this information for months and having trouble retaining it, until now. Thanks!

@krunokartus5382 Жыл бұрын

Tnx for the lecture. Just stumbled to it and find your style really calm and clear

@vitali1917 2 жыл бұрын

Thank you so much Chris.Very informative video!!!Great explanation,love it!!!

@playtime_paradise 2 жыл бұрын

Thanks for informative video Chris!

@tahersadeghi6773 8 ай бұрын

Like all of your videos, smooth and pleasant. Thank you Chris.

@reneefarrow3494 Жыл бұрын

Straight to the point - thank you.

@gcara4 Жыл бұрын

Excellent explanation Chris!!

@cwmcnutt 2 жыл бұрын

This is such a badass channel! Always great explanations and real world examples and with a pcap file attached! Thank you Chris for always providing great FREE training.

@ChrisGreer 2 жыл бұрын

Thanks @NetworkNutt! Really happy you found the channel and I appreciate the comment.

@davdiaz24 2 жыл бұрын

Yup so glad David B. Had him on his channel. This channel hits the spot for great breakdowns and easy to digest as far as his topics. This guy was meant to teach.

@misero1 11 ай бұрын

Not gonna lie. Totally underrated video. Definitely going to recommend this to the study group I'm running. Keep up the good work

@nicktucker3437 9 ай бұрын

pretty easy, straightforward stuff; learned all this in the 90s and thankfully have retained most of it. Thank you for the review. Memorizing really obscure stuff like HSRP using port udp 1985 was fun too.

@errolsimmonds4133 Жыл бұрын

Hey Chris, thank you so much for your amazing videos.

@mowatrcm1 Ай бұрын

Awesome work man. Thank you.👍🙏

@surajthakkar 2 ай бұрын

Superb content…thank you for this 🙏

@itaneh6200 3 ай бұрын

This is awesome Chris

@majiddehbi9186 2 жыл бұрын

that was realy informative thx dear chris good bless u

@ChrisGreer 2 жыл бұрын

Glad it helps!

@lechzracpogi1484 Жыл бұрын

Great video. Thanks Chris!

@ChrisGreer Жыл бұрын

Glad you liked it!

@zoeyweller6357 8 ай бұрын

Chris, you're the man! Thank you so much for sharing all of you knowledge, I continue to learn so much from you and I am so grateful!

@poscal360 8 ай бұрын

it's been a week since i'm gathering through your video, those video are so helpful for my understanding of the network. Thank you for the time that you spent creating and editing those video. sincerely

@manadeldia6443 5 ай бұрын

You are doing a great service teaching us all this in a neat and easy way. Thank you.

@ChrisGreer 5 ай бұрын

You are very welcome

@juansanchez-fu5jh 2 жыл бұрын

awesome work man keep doing these please!! i need the knowledge.

@ChrisGreer 2 жыл бұрын

Thanks, will do!

@user-kb4rn8zt9e 8 ай бұрын

Thnaks Chris you explain very well. Best regards from France

@cypress696 2 жыл бұрын

Amazing content as always, one of the best channels on KZfaq

@ChrisGreer 2 жыл бұрын

Thank you!!!

@mcgirishnetwork 2 жыл бұрын

Amazing information

@billiraydray 2 жыл бұрын

thank you so much Chris........I'm so happy for the content you've been providing. love from Sierra Leone

@ChrisGreer 2 жыл бұрын

Thank you Ray!

@BoniShadat Жыл бұрын

Nice and thanks

@thenoblequraann 2 жыл бұрын

Very well explained, was waiting for such video : Would have mentioned RDP tooo!!

@ChrisGreer 2 жыл бұрын

I know… that was one more I could have added. Maybe I need a round 2 video! 😁

@anunymous7 2 жыл бұрын

You are a gift, thank you so much! ❤

@ChrisGreer 2 жыл бұрын

Thank you!

@johnc5258 Жыл бұрын

this was great. subbed

@ChrisGreer Жыл бұрын

Thanks for the sub!

@kevingendron5586 2 жыл бұрын

Oh heck ya!! This video is an excellent review of ports and protocols as a NOOB, but I’m also going to use it to get more comfortable with Wireshark. Thanks Chris!

@ChrisGreer 2 жыл бұрын

Glad it was helpful! Please keep in touch.

@justcurious1940 7 ай бұрын

Thanks Chris.

@neadlead2621 Жыл бұрын

love the video chris , can I ask if u can do a deepdive into dns so we see the headers and the flags and how they are used in ddos and dns recursive flood , thanks for sharing

@FRITTY12348546 Жыл бұрын

Damm this was fun thank you Chris

@abrasana8538 Жыл бұрын

one word enough. perfect

@shawn8163 2 жыл бұрын

Great content

@ChrisGreer 2 жыл бұрын

Thank you!

@johnvardy9559 Жыл бұрын

Chris the great.Amazing topics as well, if i buy your course i found all of these?

@S2eedGH 2 жыл бұрын

Thanks for the Wonderful content. May I ask why we use SMB while we have FTP or SFTP, all of them used for transfer file, right?

@md_daud 2 жыл бұрын

Thank you ❤️

@ChrisGreer 2 жыл бұрын

You are welcome!

@user-sc2gg7dn3d Жыл бұрын

Thanks

@rteeraphong 8 ай бұрын

Superb!! Why doesn't the teacher teach me like this 😂

@jonkeck7489 2 жыл бұрын

Chris, another great video! Where could one purchase a packethead T-shirt?

@ChrisGreer 2 жыл бұрын

Thanks! You should see links to the merch below the video or on my channel store

@ssd431 2 жыл бұрын

Thank you soooooooo muuuuuuccccchhh, I made a protocol post and its on my wall it was sooo much work ToT

@ChrisGreer 2 жыл бұрын

You bet! I hope the video helps you remember all this. 👍

@cryproot9845 2 жыл бұрын

I have started in this beautiful world of content on KZfaq, I am new to this and here we go with issues of cybersecurity and ethical hacking

@ChrisGreer 2 жыл бұрын

Awesome! Welcome to the dark side. :-) Ok just kidding. Enjoy the content!

@aloewishus Жыл бұрын

this is so interesting! Ishould be coding for my work...instead I'm watching these things called packets fly around. 😲

@Leafspine 2 жыл бұрын

Hi Chris,like from Kyrgyzstan 👍

@ChrisGreer 2 жыл бұрын

Wassup!! Thanks for the comment!

@likeaboss512 9 ай бұрын

Don't forget snmp runs on 162 as well when utilizing traps

@olafzijnbuis 2 жыл бұрын

Interesting and very clear video. But I wonder why you should have to KNOW all them port numbers. I feel it makes more sense to understand the purpose and global working of the protocol. The details are easy to find. The port number is very useful, of course, but easy to look up. Or do they ask you at exams "What is the port number for FTP?"

@ChrisGreer 2 жыл бұрын

Like I said in the video, if you are studying for a cert, this stuff will definitely come up on the test. Also - if you are doing more packet analysis or network enumeration, learning the port numbers will really help speed up your analysis.

@olafzijnbuis 2 жыл бұрын

@@ChrisGreer I am sure that if I ever do some real work in this field I will pick up the most common port number quickly. Just learning them is pointless. They are after all not like traffic signs where there is no time to ask Google. I prefer to acquire knowledge, not facts. All this assumes that there is no logic in the port numbers used. I am just looking at your excellent videos because I like to know a little more about it.

@house105a 2 жыл бұрын

Chris, amazing video and also the conversation with David Bombal. I have a workshop coming up that I would love for you to present at in San Juan, Puerto Rico. If interested, please reply and we can discuss. The workshop is in May with the Department of Homeland Security. Thanks

@ChrisGreer 2 жыл бұрын

Hi Vince! Thanks for the comment. Sure let’s chat. I will reach out on LinkedIn.

@neadlead2621 Жыл бұрын

I have another question ,please if we tftp uses udp why we see the client makes an ack for the packet ?

@SharukhKhan-kf7fj 2 жыл бұрын

Thanks chris again. Amazing explanation. Chris can we bypass HSTS protocol means we can downgrade it to http. I research on it but i can't read any reliable content about it. So chris if you konow any method than please make a videos on it

@ChrisGreer 2 жыл бұрын

Hey! Thanks for the comment. Hmmm… I will need to dig into that and do some testing.

@rammyunderwater 2 жыл бұрын

Hello Mr Chris , am kindly asking where can I get some the trace files you captured for the different kinds of attacks on you device . I would like to go through them for my own understanding.

@ChrisGreer 2 жыл бұрын

Hello Ramson - I usually put the pcap I am working with in the description for most of my videos. If I didn’t put it there it is because I couldn’t, or it just was not a good one to share. Thanks for the comment.

@sreekanth5009 2 жыл бұрын

Your fans from India 🇮🇳 ♥

@HalfInsaneOutdoorGuy 11 ай бұрын

TFTP is UDP correct?

@Closer80IT 2 жыл бұрын

Quick question: is it possible that a clients generates 0 length packets with the same sequence and next sequence number?

@ChrisGreer 2 жыл бұрын

Yes, if the ack number increases, then it is just acking new data. If the ack number does not increase, it is a duplicate ack.

@codedecode285 2 жыл бұрын

Hey Chris Greer from where u learn this

@ChrisGreer 2 жыл бұрын

I started out as a network engineer. I always was amazed at the packet people that were able to fix the stuff that nobody else could. I was hooked!

@samjones4327 Ай бұрын

Thanks a 4 sharing this valuable information! Cheers!

@jax4652 Жыл бұрын

Today in class we needed to look at a SMTP and a POP3 file in wireshark, and I asked if SMTP can be encrypted. They said no. Argh, so frustrating to hear that it can be, after all.

@thelostmarbles4310 2 жыл бұрын

Please help... If DHCP 'gives' a computer an ip address... what does it mean to give an 'address to an address'. This seems like sending a letter to someone's address and contained within the letter is an address?? How can the 'new dhcp address' reach the address if there is no address??

@JameelNasirShah 3 ай бұрын

DNS : TCP/UDP 53 FTP: TCP 21 for Control Channel, 20 for Data Channel DHCP: UDP 68 for Client, 68 for Server HTTP: TCP 80 HTTPS: TCP 443 IMAP: TCP 143, over TLS uses 993 LDAP: UDP 389, LDAPs: TCP 636 NTP: UDP 123 POP3: TCP 110, over TLS uses 995 SMTP: TCP 25 SNMP: UDP 161 SMB: UDP 445 SSH: TCP 22 TELNET: TCP 23 TFTP: UDP 69

@michaelmueller5211 Жыл бұрын

dns:53, dns over tls:853

@adamapeter4213 2 жыл бұрын

Sir am using andrind phone i don't have laptop, what should i do, please help me out in my career.

@ChrisGreer 2 жыл бұрын

Give www.cloudshark.io a try. It is a cloud-based version of Wireshark

@julesdeleuse5104 5 ай бұрын

13:55

@S.Oliveira007 2 жыл бұрын

put translation options in the subtitles please, Chis. thanks

@ChrisGreer 2 жыл бұрын

I will look at doing that - thank you for the suggestion!

@sri9277 2 жыл бұрын

Waiting for video

@ChrisGreer 2 жыл бұрын

Coming soon!

@sri9277 2 жыл бұрын

@@ChrisGreer congratulations for 50k subscribers soon you will reach one million subscribers . You are delivering a great content in KZfaq . Once again thank you for all this knowledge.

@anntakamaki1960 Жыл бұрын

Vsftpd 2.3.4 😬 😬

@HalfInsaneOutdoorGuy 11 ай бұрын

pickupline nobody gets, I am so nerd, that at the end of my date, I ask my girl for TFTP.

@danr4746 20 күн бұрын

You lost me early.

@weniweedeewiki.6237 Жыл бұрын

I love too watch more but i got to up in the morning to prepare for my ccna which is on the 1/2/2023...man i learn so much from you bro....

@AlexanderMeier-iw7bz 7 ай бұрын

hello #MRGREER entire video very intriguing, but as a novice who searched KZfaq: How To HTTP CUSTOM Android App, I seen this video. Question: How would the information you provided would help me with #HTTPCustom App ? #ThankYou #ChrisGreer