#tecversity

🔥 𝗛𝗼𝘄 𝗙𝗶𝗿𝗲𝘄𝗮𝗹𝗹𝘀 𝗪𝗼𝗿𝗸𝘀?: 𝗦𝘁𝗲𝗽-𝗯𝘆-𝗦𝘁𝗲𝗽 𝗚𝘂𝗶𝗱𝗲! 🛡️

1️⃣ 𝗖𝗹𝗶𝗲𝗻𝘁 𝗥𝗲𝗾𝘂𝗲𝘀𝘁: A client (computer) initiates a request to access a resource (e.g., a webpage or database query).

2️⃣ 𝗡𝗲𝘁𝘄𝗼𝗿𝗸 𝗧𝗿𝗮𝗻𝘀𝗺𝗶𝘀𝘀𝗶𝗼𝗻: The request is sent over the network towards the destination server.

3️⃣ 𝗙𝗶𝗿𝗲𝘄𝗮𝗹𝗹 𝗘𝗻𝗰𝗼𝘂𝗻𝘁𝗲𝗿: The request first encounters the firewall, which acts as a security checkpoint.

4️⃣ 𝗣𝗮𝗰𝗸𝗲𝘁 𝗙𝗶𝗹𝘁𝗲𝗿𝗶𝗻𝗴: 🚩 The firewall checks the request against predefined security rules. 🚩 If the packet meets security criteria (e.g., allowed IPs, ports, protocols), it moves forward. 🚩 If the packet doesn’t meet the criteria, it is dropped (blocked).

5️⃣ 𝗙𝗼𝗿𝘄𝗮𝗿𝗱𝗶𝗻𝗴 𝘁𝗼 𝗦𝗲𝗿𝘃𝗲𝗿: If the request passes all checks, the firewall forwards it to the destination server.

6️⃣ 𝗦𝗲𝗿𝘃𝗲𝗿 𝗣𝗿𝗼𝗰𝗲𝘀𝘀𝗶𝗻𝗴: The server processes the client’s request (e.g., retrieving a webpage, fetching data).

7️⃣ 𝗥𝗲𝘀𝗽𝗼𝗻𝘀𝗲 𝗙𝗶𝗹𝘁𝗲𝗿𝗶𝗻𝗴: The server’s response passes through the firewall again, ensuring no malicious content is sent back to the client. If safe, it is delivered.

𝗙𝗶𝗿𝗲𝘄𝗮𝗹𝗹 𝗦𝗲𝗰𝘂𝗿𝗶𝘁𝘆 𝗙𝗲𝗮𝘁𝘂𝗿𝗲𝘀:
✅ Application Layer Filtering: Protects against threats like malicious URLs, file type filtering, and intrusion detection.

✅ Packet Filtering Rules: Defines what traffic is allowed or blocked based on IP addresses, ports, and protocols.

✅ Stateful Inspection Rules: Tracks connection states, verifies new connections, and enforces security timeouts.

𝗪𝗵𝘆 𝗙𝗶𝗿𝗲𝘄𝗮𝗹𝗹𝘀 𝗠𝗮𝘁𝘁𝗲𝗿?

🔹 Protects networks from unauthorized access.
🔹 Blocks malware, phishing attempts, and hackers.
🔹 Ensures only legitimate traffic reaches your system.

Firewalls are a must-have in today’s threat landscape.

#CyberSecurity #Firewall #NetworkSecurity #ITSecurity #CyberDefense #ZeroTrust #tecversity #sysmorphosec #venkateshnataraj

8 months ago | [YT] | 3

#tecversity

Network Protocols

#networking #network #security #protocols #tecversity #venkateshnataraj

9 months ago | [YT] | 1

#tecversity

Endpoint Detection Response
#edr #networking #network #security #cybersecurity #endpoint #tecversity #venkateshnataraj

9 months ago | [YT] | 1

#tecversity

OSI layers and Cyber Attack

#osi #cyberattack #networking #security #tecversity #venkateshnataraj

9 months ago | [YT] | 2

#tecversity

How does HTTPS work?

#tecversity #networking #https #systems #internet #venkateshnataraj

9 months ago | [YT] | 2

#tecversity

Today, we celebrate the 76th Republic Day of India, a day that marks the adoption of our Constitution and the values of justice, liberty, equality, and fraternity it stands for. Let us honor the vision of our forefathers and pledge to uphold the democratic spirit of our nation. Wishing everyone a very Happy Republic Day! 🇮🇳

#republicday #76threpublicday #india #democracy #UnityInDiversity #ProudIndian #constitutionDay #Indianconstitution #JusticeLibertyEquality #tecversity

10 months ago | [YT] | 1

#tecversity

Process involved in #dhcp #networking #tecversity

11 months ago | [YT] | 2

#tecversity

Process involved in #dhcp #tecversity #networking

11 months ago | [YT] | 2

#tecversity

🎙️ Exciting News! Our 1st Podcast is Coming Soon! 🎉

Hey, #Tecversity community! 🚀

We are thrilled to announce the launch of our very first podcast! 🎧✨ Get ready for engaging discussions, thought-provoking ideas, and expert insights as we dive into "Mastering the Art and Science of Technical Program Management: Timeless Lessons from a Seasoned Leader"

What to Expect:

🔍 In-depth conversations with industry expert

💡 Fresh perspectives on Technical Program Management

🎤 Stories that inspire and empower


Stay tuned for updates on the launch date, exclusive sneak peeks, and behind-the-scenes content. 🌟

Don't forget to like, subscribe, and hit that notification bell 🔔 so you don’t miss out!

#Our1stPodcast #ComingSoon #PodcastLaunch #tecversity #Innovation #StayTuned #programmanagement

11 months ago | [YT] | 4

#tecversity

7 Essential Networking Protocols Every Tech Pro Should Know

1. TCP/IP (Transmission Control Protocol/Internet Protocol)
• The Internet's foundation
• TCP: Ensures reliable, ordered data delivery
• IP: Handles addressing and routing
• Key features:
- Connection-oriented (TCP)
- Error checking and recovery
- Flow control
• Common ports: HTTP (80), HTTPS (443), FTP (21)
• Troubleshooting tools: ping, traceroute, netstat

2. DNS (Domain Name System)
• Internet's phonebook: maps domain names to IP addresses
• Hierarchical, distributed database
• Key components:
- Root servers
- TLD (Top-Level Domain) servers
- Authoritative name servers
• Record types: A, AAAA, MX, CNAME, TXT
• Security concern: DNS cache poisoning
• Troubleshooting tool: nslookup, dig

3. HTTP/HTTPS (Hypertext Transfer Protocol / Secure)
• Application layer protocol for web communication
• HTTP methods: GET, POST, PUT, DELETE, etc.
• Status codes:
- 2xx (Success)
- 3xx (Redirection)
- 4xx (Client Error)
- 5xx (Server Error)
• HTTPS: Adds SSL/TLS encryption
• Performance optimization: HTTP/2, HTTP/3
• Debugging tools: Chrome DevTools, Wireshark

4. SMTP (Simple Mail Transfer Protocol)
• Standard for email transmission
• Works with other protocols: POP3, IMAP
• Key features:
- Store and forward
- Queuing
- Notification of delivery failure
• Security measures: SPF, DKIM, DMARC
• Common ports: 25 (unencrypted), 587 (TLS)
• Troubleshooting tool: telnet

5. FTP (File Transfer Protocol)
• Standard for file transfers over TCP networks
• Operates on separate control and data connections
• Modes: Active vs. Passive
• Security concern: data transmitted in cleartext
• Secure alternatives: SFTP, FTPS
• Common ports: 20 (data), 21 (control)
• Client tools: FileZilla, WinSCP

6. UDP (User Datagram Protocol)
• Connectionless transport protocol
• Use cases: DNS queries, VOIP, streaming media
• Advantages:
- Low latency
- Simple error checking
• Disadvantages: No guarantee of delivery or order
• Common ports: DNS (53), DHCP (67, 68)
• Debugging tool: Wireshark

7. DHCP (Dynamic Host Configuration Protocol)
• Automates IP address assignment
• Key components:
- DHCP server
- DHCP client
- DHCP relay agent
• Lease process: DORA (Discover, Offer, Request, Acknowledge)
• Options: Subnet mask, default gateway, DNS servers
• Troubleshooting commands: ipconfig /release, ipconfig /renew

Understanding these protocols is just the beginning. The real skill lies in applying this knowledge to design robust networks, troubleshoot complex issues, and optimize performance.

#tecversity

1 year ago | [YT] | 3