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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Concept explainers

VLAN

VLAN stands for Virtual Local Area Network, and it is created from one or more local area networks. A Virtual Local Area Network (VLAN) is a customized network made up of one or more LANs. It allows a set of devices from different networks to be converted into a single logical network. As a result, a virtual LAN that is managed similarly to a physical LAN emerges.

Question

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

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