Network Attacks and Defenses

256  ◾  Network Attacks and Defenses: A Hands-on Approach

7.7.3.2 Filtering Rules Implementation

for Passive FTP Traffic

Using Jetico Personal Firewall’s GUI interface, the following

screenshot shows the implementation of the four filtering rules

from the above table, required to allow Passive FTP traffic.

The following screenshots show the detailed contents of the

filtering rules shown in the above screenshot.

1. Outgoing SYN packets for the Command and Data

channels:

Packet Filtering and Inspection  ◾  257

2. Incoming SYN-ACK packets for the Co