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| 1. The first one is to prevent users from seeing information about processes that are being run under another UID. 2. Enable the concept of blackholing. This is so RST packets don't get sent back in response to closed ports. This helps to block port scans. 3. Generate a random ID for the IP packets as opposed to incrementing them by one. This will prevent remote observers from determining the rate packets are being generated by watching the counter. 4. Disabling ctrl+alt+del so somebody can't walk up to your box and reboot the server. 5. Drop SYN/FIN packets 6. Enable stealth forwarding. Stealth forwarding passes packets without touching the TTL, so this is useful for hiding firewalls from traceroutes. |