Skip to content

Instantly share code, notes, and snippets.

githubfoam / coding exercise
Last active July 22, 2024 12:22
coding exercise
Here are two approaches to finding the most frequent integer in a Java array, along with explanations of their performance:
Method 1: Using a Hash Table (More Efficient)
githubfoam / windows 10 cheat sheet
Created June 12, 2024 07:22
windows 10 cheat sheet
Here are two ways to run a JNLP file on Windows 10:
Method 1: Using Java Web Start Launcher
Make sure you have Java installed: JNLP files rely on Java to run the application they describe. You can check if you have Java by searching for "java -version" in the Command Prompt or PowerShell. If you don't have it, download and install the latest version from Java download page.
Right-click on the JNLP file: Locate the JNLP file you want to run. Right-click on it.
githubfoam / password crack cheat sheet
Last active May 31, 2024 03:36
password crack cheat sheet
let's calculate the estimated cracking time for an 8-character password with only lowercase alphabetical characters.
Number of possible characters:
We have lowercase alphabets (a-z), which is 26 characters.
Password Length:
githubfoam / ai security cheat sheet
Created February 29, 2024 11:28
ai security cheat sheet
Artificial intelligence (AI) attacks leverage AI techniques and vulnerabilities within AI systems to manipulate, deceive, or disrupt their intended behavior. Here are some common types of AI attacks with examples:
1. Adversarial Attacks
Aim: Fool AI models into making incorrect predictions or classifications.
Method: Subtle perturbations are crafted and added to input data. These might be imperceptible to a human, like slightly changing pixels in an image, but can drastically change the model's output.
Example: An image recognition system designed for self-driving cars might be tricked into misidentifying a stop sign as a speed limit sign by carefully altered pixels.
githubfoam / DHCP Cheat Sheet
Last active May 31, 2024 03:36
DHCP Cheat Sheet
Detecting DHCP issues and misconfigurations requires careful examination of DHCP server settings and network behavior. Here are steps to help you find and address DHCP misconfigurations:
1. Check DHCP Server Logs:
Review the logs on the DHCP server for any error messages or warnings related to IP address assignments, conflicts, or lease expirations.
2. IP Address Conflicts:
Identify IP address conflicts by checking for duplicate IP addresses assigned to different devices. DHCP servers typically log conflicts, or you can use tools like arp -a on Windows or show arp on network devices.
3. Lease Duration:
githubfoam / VMWare Workstation Cheat Sheet
Last active February 9, 2024 10:42
VMWare Workstation Cheat Sheet
#compare mac address in the network adapter settings to the one in the output of command ip addr
Open a terminal on your Ubuntu 20.04 virtual machine.
Run the ip addr command to display information about the network interfaces.
ip addr
Virtual Machine Settings - Hardware - Network Adapter - Advanced - MAC Address
githubfoam / fortigate sniff packet cheat sheet
Last active February 17, 2024 13:46
fortigate sniff packet cheat sheet
diagnose sniffer packet vs diag debug flow filter
# diagnose sniffer packet checks if the packet reaches fortigate
# diag debug flow filter checks packet's traffic within fortigate internally
diagnose debug flow #trace per-packet operations for flow tracing
diagnose sniffer packet #trace per-Ethernet frame
#WEB GUI v7.2.3
githubfoam / nmap cheat sheet
Last active May 31, 2024 03:29
nmap cheat sheet
Wireshark Output for nmap IP Fragment Scan (Sample):
Filter: == 1
No. Time Source Destination Protocol Length Info
1 00:00:00.000000 TCP 40 Fragment 1 of TCP SYN probe to port 22 (SSH)
2 00:00:00.001000 TCP 32 Fragment 2 of TCP SYN probe to port 22 (SSH)
3 00:00:00.002000 TCP 40 Fragment 1 of TCP SYN probe to port 80 (HTTP)
4 00:00:00.003000 TCP 32 Fragment 2 of TCP SYN probe to port 80 (HTTP)
5 00:00:00.004000 TCP 40 Fragment 1 of TCP SYN probe to port 443 (HTTPS)
... (Similar entries for other ports)
githubfoam / email security cheat sheet
Last active January 17, 2024 03:55
email security cheat sheet
Email remains a critical communication tool for businesses but is also a common vector for various cyber threats. Here are some email threats and countermeasures:
Phishing: Attackers impersonate legitimate entities to deceive recipients into revealing sensitive information or performing actions. Countermeasures include employee training for recognizing phishing attempts, implementing email filters to flag suspicious emails, and using authentication methods like DMARC, SPF, and DKIM to verify sender authenticity.
Malware Attachments: Emails may contain attachments (e.g., documents, executables) carrying malware. Employing robust antivirus software, sandboxing attachments for analysis, and restricting executable attachments can mitigate this threat.
Spoofing and Business Email Compromise (BEC): Attackers spoof email addresses to impersonate trusted entities, aiming to trick recipients into transferring
githubfoam / network devices security( switch,router etc) cheat sheet
Last active May 31, 2024 03:36
network devices security( switch,router etc) cheat sheet
#dhcp snooping chatgpt
DHCP snooping is a feature used to mitigate rogue DHCP server attacks by filtering DHCP messages received from untrusted sources. Here's a step-by-step guide to configure, test, and verify DHCP snooping on a Cisco switch:
Configuration Steps:
1. Enable DHCP Snooping:
Copy code