CONTENTS

Firewalls: Firewall Misconfiguration

Firewall Misconfiguration 1. 

1.  Configuring the console computer:

1.  Log-in or continue the session. 

 2.  Type in the following commands.

>delete filter ether1.in
>add filter ether1.in
>set filter ether1.in 1 permit icmp
>set filter ether1.in 2 deny icmp
>set ether1 ifilter ether1.in
>save filter

2.  Question: On the client computer can you

1. Open the FTP connection __________
2. Open the telnet connection __________
3.  PING to the server __________

3.  Configuring the console computer. 

1.  Log-in or continue the session.
2.  Type in the following commands.

>delete filter ether1.in
>add filter ether1.in
>set filter ether1.in 1 deny icmp
>set filter ether1.in 2 permit icmp
>set ether1 ifilter ether1.in
>save filter

4. Question: On the client computer can you

1. Open the FTP connection __________
2. Open the telnet connection __________
3.  PING to the server __________
4. Discuss the results from the two different configurations.