You need to learn TCP/IP. It's so much part of our life. Doesn't matter if you are studying for cybersecurity, or networking or something else. Learn TCP/IP.

// MENU //
00:00 ▶️ Intro
01:32 ▶️ The beginnings of TCP
03:57 ▶️ Three way handshake
07:20 ▶️ SYN meaning/explanation
08:50 ▶️ Port numbers
09:58 ▶️ What actually happens in the handshake
14:19 ▶️ Common starting TTL values
15:04 ▶️ Why we need SYN numbers
16:11 ▶️ What actually happens in the handshake (cont'd)
19:00 ▶️ Q&A (SYN,SYN-ACK,ACK - Sequence numbers - Increments - Tips)
33:01 ▶️ History of TCP
34:44 ▶️ TCP options
36:56 ▶️ TCP flags
41:53 ▶️ TCP Window - window size and scale
59:04 ▶️ MSS (Maximum Segment Size)
59:49 ▶️ SACK (Selective Acknowledgement)
01:00:13 ▶️ Conclusion

// PCAP File //
Wireshark TCP pcap file: https://davidbombal.wiki/deeptcp1

// MY STUFF //
https://www.amazon.com/shop/davidbombal

// SOCIAL //
Discord: https://discord.com/invite/usKSyzb
Twitter: https://www.twitter.com/davidbombal 
Instagram: https://www.instagram.com/davidbombal 
LinkedIn: https://www.linkedin.com/in/davidbombal 
Facebook: https://www.facebook.com/davidbombal.co 
TikTok: http://tiktok.com/@davidbombal
YouTube: https://www.youtube.com/davidbombal 

//CHRIS GREER //
LinkedIn: https://www.linkedin.com/in/cgreer/
YouTube: https://www.youtube.com/c/ChrisGreer
Twitter: https://twitter.com/packetpioneer
Pluralsight: TCP Analysis Course: https://davidbombal.wiki/tcpwireshark

// SPONSORS //
Interested in sponsoring my videos? Reach out to my team here: sponsors@davidbombal.com

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Please note that links listed may be affiliate links and provide me with a small percentage/kickback should you use them to purchase any of the items listed or recommended. Thank you for supporting me and this channel! 

#wireshark #tcp #hacking

#353: How TCP really works // Three-way handshake // TCP/IP Deep Dive

Wireshark TCP Deep Dive continues: You need to understand this - whats the difference between Maximum Transmission Unit (MTU) vs Maximum Segment Size (MSS).

// MENU //
00:00 ▶️ Coming Up
00:25 ▶️ Intro
00:32 ▶️ Chris introduction
00:47 ▶️ Topic: Maximum Segment Size (MSS)
01:27 ▶️ Explaining Maximum Transmission Unit (MTU)
08:42 ▶️ Interface layout
10:25 ▶️ David Bombal "War Story" 
12:00 ▶️ Wireshark demo  
13:26 ▶️ Increasing the MTU on your device for larger connections
16:27 ▶️ Difference between MTU and MSS
19:36 ▶️ Wireshark demo (cont'd)
24:58 ▶️ Using Path MTU Discovery
27:02 ▶️ Ping and Wireshark demo
33:32 ▶️ Cool trick for Mac system  
35:08 ▶️ TCP/MSS Clamping
38:21 ▶️ Chris Greer "War Story"
51:09 ▶️ What happens if you can't capture a server
55:08 ▶️ MSS Adjustment commands
56:55 ▶️ Tunnel Path MTU Discovery 
57:40 ▶️ Figuring out 1432
01:02:52 ▶️ Conclusion
01:04:48 ▶️ "Cool features" in Wireshark

Previous video: https://youtu.be/rmFX1V49K8U

// Wireshark PCAP files //
MTU PCAP: https://github.com/packetpioneer/yout...
War Story PCAP Client: https://github.com/packetpioneer/yout...
War Story PCAP Server: https://github.com/packetpioneer/yout...
Special “Thumbs Up” and “Subscribe” PCAP: https://github.com/packetpioneer/yout...

// VLAD SOCIAL //
Twitter: https://twitter.com/Packet_vlad
PMTUD Blog: http://www.packettrain.net/2016/09/21...
Thanks Vladimir Gerasimov! 

// GOOD READING //
Network Implications of PMTUD: https://www.ipspace.net/kb/Internet/P...
Path MTU Discovery: https://www.ipspace.net/kb/Internet/P...
Resolve IPv4 Fragmentation, MTU, MSS, and PMTUD Issues with GRE and IPsec: https://www.cisco.com/c/en/us/support...
Configuring TCP MSS Adjustment: https://www.cisco.com/c/en/us/td/docs...
Ethernet MTU and TCP MSS Adjustment Concept for PPPoE Connections: https://www.cisco.com/c/en/us/support...


// MY STUFF //
https://www.amazon.com/shop/davidbombal

// David SOCIAL //
Discord: https://discord.com/invite/usKSyzb
Twitter: https://www.twitter.com/davidbombal 
Instagram: https://www.instagram.com/davidbombal 
LinkedIn: https://www.linkedin.com/in/davidbombal 
Facebook: https://www.facebook.com/davidbombal.co 
TikTok: http://tiktok.com/@davidbombal
YouTube: https://www.youtube.com/davidbombal 

// Chris SOCIAL //
Udemy course: https://davidbombal.wiki/chriswireshark
LinkedIn: https://www.linkedin.com/in/cgreer/
YouTube: https://www.youtube.com/c/ChrisGreer
Twitter: https://twitter.com/packetpioneer

// SPONSORS //
Interested in sponsoring my videos? Reach out to my team here: sponsors@davidbombal.com

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Please note that links listed may be affiliate links and provide me with a small percentage/kickback should you use them to purchase any of the items listed or recommended. Thank you for supporting me and this channel! 

#wireshark #tcp #mtu

#376: VPN slow? Network nightmares? How TCP really works: MTU vs MSS

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