Your network has an external filtering router whose IP address is 10.10.10.1. What do the following firewall rules do? Protocol TCP TCP a) None of these Source Addr 10.10.10.1 ANY b) Prevent internal communication directly with the firewall a) c) Prevent external communication directly with the firewall d) Prevent all communication directly with the firewall b) Protocol ICMP Protocol ICMP c) None of these d) Question 6 The most common ICMP command is ping, which stands for Packet Internet Groper (yes, that's what it stands for). It determines if a host is unreachable on the network. To prevent attackers from using ping to identify some of your resources, you need to establish specific firewall rules regarding ICMP packets. The tables below are specific to ICMP. Which of the following blocks ping packets from locating internal hosts? Note that the columns are different for ICMP than what you've seen for TCP. Protocol ICMP Source Port ANY ANY Source Addr ANY Source Addr ANY Source Addr ANY Target Addr ANY 10.10.10.1 Target Addr 192.168.4.104 Target Addr 192.168.4.104 Target Addr 192.168.4.104 Target Port ANY ANY ICMP Msg Echo Reply ICMP Msg TTL ICMP Msg Echo Request Action DENY Action DENY Action DENY DENY Action DENY

Your network has an external filtering router whose IP address is 10.10.10.1. What do the following firewall rules do? Protocol TCP TCP a) None of these Source Addr 10.10.10.1 ANY b) Prevent internal communication directly with the firewall a) c) Prevent external communication directly with the firewall d) Prevent all communication directly with the firewall b) Protocol ICMP Protocol ICMP c) None of these d) Question 6 The most common ICMP command is ping, which stands for Packet Internet Groper (yes, that's what it stands for). It determines if a host is unreachable on the network. To prevent attackers from using ping to identify some of your resources, you need to establish specific firewall rules regarding ICMP packets. The tables below are specific to ICMP. Which of the following blocks ping packets from locating internal hosts? Note that the columns are different for ICMP than what you've seen for TCP. Protocol ICMP Source Port ANY ANY Source Addr ANY Source Addr ANY Source Addr ANY Target Addr ANY 10.10.10.1 Target Addr 192.168.4.104 Target Addr 192.168.4.104 Target Addr 192.168.4.104 Target Port ANY ANY ICMP Msg Echo Reply ICMP Msg TTL ICMP Msg Echo Request Action DENY Action DENY Action DENY DENY Action DENY

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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