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Question of the day 08/09, Cybersecurity Edition

2 years ago
September 8, 2022
4 comments
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marcofabbri
On the path to Greatness
990 comments

Day 7.

What is missing from a half-open scan?

FIN
SYN-ACK
ACK
SYN
RST

Best answer by JMeixner

ACK (the last ACK)

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JMeixner
On the path to Greatness
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Answer
2 years ago
September 8, 2022

ACK (the last ACK)

Jochen (Joe) Meixner | Veeam Vanguard 2024 | Veeam Legend 2021 - 2024 | Veeam Certified Architect (VMCA) | Twitter: @JoMeix | BlueSky: @jmeixner.bsky.social

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+11

Link State
Veeam Legend
605 comments
2 years ago
September 8, 2022

SYN-ACK

Veeam: VMCA | VMCE | VMXP | Veeam Legend - Microsoft: MCITP | MCP | MCSA | 2008 R2 | 2012R2 | 2016 | MCSE Core Infrastructure | MCSE Cloud Platform - Azure: AZ900 | AZ104| AZ500 - AWS Cloud Practitioner - VMWare: VCP-DCV Vsphere 7.x - Cisco: CCNA (Expired)

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+21

Chris.Childerhose
Veeam Legend, Veeam Vanguard
8439 comments
2 years ago
September 8, 2022

ACK

Chris Childerhose - VMCA2024 | VMCE2023 | VMCE-SP2024 | Veeam Vanguard 8* | Veeam Legend 5* | vExpert 6* | VCAP-DCV/VCP-DCV | Object First Ace | Cisco Champion | Twitter: @cchilderhose | Blog Site – https://just-virtualization.tech

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+13

marcofabbri
Author
On the path to Greatness
990 comments
2 years ago
September 9, 2022

In an half-scan, what is missing is last ACK.

It’s used to avoid logging on scanned device by interrupting TCP handshake.

On nmap is “-sS” and it’s the default scan.

Backups are like pizza, I love them. | Linkedin: @marco-fabbri-it

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