Security Groups & Key Pairs

Instance-Level Firewall & SSH

💡 Security, Group, EK, "BOUNCER", jaisa, hai, HAR, instance, ke, DARWAZE, PAR, — YE, DECIDE, karta hai, KAUN, ANDAR, AA, sakta hai, aur, KAUNSE, PORT, se. Key, Pair, EK, "PERSONAL, ID, CARD" jaisi, hai, JO, SIRF, TUMHE, hi, LOGIN, karne, deti, hai.

Security, Groups, EK, VIRTUAL, FIREWALL, hai, HAR, EC2, instance, ke, liye — YE, STATEFUL, hai, MATLAB, INBOUND, allow, hote, hi, RESPONSE, (outbound) AUTOMATICALLY, ALLOW, ho, jaata hai.

SSH, se, CONNECT, karne, ke, liye, EK, KEY, PAIR, (public/private, key) chahiye — PUBLIC, KEY, instance, mein, INJECT, hoti, hai, PRIVATE, KEY, TUM, APNE, PAAS, RAKHTE, ho.

aws ec2 authorize-security-group-ingress --group-id sg-12345 --protocol tcp --port 22 --cidr 203.0.113.0/24
ssh -i my-key.pem ec2-user@<public-ip>

🔒

Security, Group, EK, "BOUNCER", jaisa, hai, HAR, instance, ke, DARWAZE, PAR, — YE, DECIDE, karta hai, KAUN, ANDAR, AA, sakta hai, aur, KAUNSE, PORT, se. Key, Pair, EK, "PERSONAL, ID, CARD" jaisi, hai, JO, SIRF, TUMHE, hi, LOGIN, karne, deti, hai.

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⚡ Quick Recap

Security Group = stateful virtual firewall, har instance ke liye
Key Pair = SSH access ke liye public/private key
SSH port (22) ko sirf trusted IPs ke liye open rakho

Is page mein (2 subtopics)

Security, Groups, EK, VIRTUAL, FIREWALL, hai, HAR, EC2, instance, ke, liye — YE, STATEFUL, hai, MATLAB, agar, INBOUND, traffic, ALLOW, hai, TO, USKA, RESPONSE, (outbound) AUTOMATICALLY, ALLOW, ho, jaata hai, ALAG, se, RULE, banane, ki, ZAROORAT, nahi.

aws ec2 authorize-security-group-ingress --group-id sg-12345 --protocol tcp --port 22 --cidr 203.0.113.0/24

EC2, instance, PAR, SSH, se, CONNECT, karne, ke, liye, EK, KEY, PAIR, (public/private, key) chahiye — PUBLIC, KEY, AWS, ke, PAAS, RAHTI, hai, aur, INSTANCE, mein, INJECT, hoti, hai, PRIVATE, KEY, TUM, APNE, PAAS, RAKHTE, ho.

💡Tip: Private, key, (.pem, FILE) KABHI, bhi, KHO, mat, jaane, do — agar, KHO, gayi, TO, USI, instance, mein, DOBARA, SSH, karna, MUSHKIL, ho, jaata hai (naya, key, pair, ATTACH, karne, ke, EXTRA, STEPS, karne, PADTE, HAIN).

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Security Groups & Key Pairs

Security Groups are Stateful

SSH Key Pairs