Rebecca has noted multiple entries in her logs about users attempting to connect on ports that are either not opened or ports that are not for public usage. How can she restrict this type of abuse by limiting access to only specific IP addresses that are trusted by using one of the built-in Linux Operating System tools?

WinDump is a popular sniffer which results from the porting to Windows of TcpDump for Linux.
What library does it use ?

Jim’s organization has just completed a major Linux roll out and now all of the organization’s systems are running the Linux 2.5 kernel. The roll out expenses has posed constraints on purchasing other essential security equipment and software. The organization requires an option to control network traffic and also perform stateful inspection of traffic going into and out of the DMZ.

Which built-in functionality of Linux can achieve this?

You have just installed a new Linux file server at your office. This server is going to be used by several individuals in the organization, and unauthorized personnel must not be able to modify any data.

What kind of program can you use to track changes to files on the server?

Joe the Hacker breaks into company’s Linux system and plants a wiretap program in order to sniff passwords and user accounts off the wire. The wiretap program is embedded as a Trojan horse in one of the network utilities. Joe is worried that network administrator might detect the wiretap program by querying the interfaces to see if they are running in promiscuous mode.

Running "ifconfig a" will produce the following:

# ifconfig a

1o0: flags=848<UP,LOOPBACK,RUNNING,MULTICAST> mtu 8232

inet 127.0.0.1 netmask ff000000hme0:

flags=863<UP,BROADCAST,NOTRAILERS,RUNNING,PROMISC,MULTICAST> mtu inet 192.0.2.99 netmask ffffff00 broadcast 134.5.2.255 ether

8:0:20:9c:a2:35

What can Joe do to hide the wiretap program from being detected by ifconfig command?

Windump is the windows port of the famous TCPDump packet sniffer available on a variety of platforms. In order to use this tool on the Windows platform you must install a packet capture library.

What is the name of this library?

Samuel is high school teenager who lives in Modesto California. Samuel is a straight `A’ student who really likes tinkering around with computers and other types of electronic devices. Samuel just received a new laptop for his birthday and has been configuring it ever since. While tweaking the registry, Samuel notices a pop up at the bottom of his screen stating that his computer was now connected to a wireless network. All of a sudden, he was able to get online and surf the Internet.

Samuel did some quick research and was able to gain access to the wireless router he was connecting to and see al of its settings? Being able to hop onto someone else’s wireless network so easily fascinated Samuel so he began doing more and more research on wireless technologies and how to exploit them. The next day Samuel’s fried said that he could drive around all over town and pick up hundred of wireless networks. This really excited Samuel so they got into his friend’s car and drove around the city seeing which networks they could connect to and which ones they could not.

What has Samuel and his friend just performed?

In an attempt to secure his 802.11b wireless network, Bob decides to use strategic antenna positioning. He places the antenna for the access point near the center of the building. For those access points near the outer edge of the building he uses semi-directional antennas that face towards the buildings center. There is a large parking lot and outlying filed surrounding the building that extends out half a mile around the building. Bob figures that with this and his placement of antennas, his wireless network will be safe from attack.
Which of he following statements is true?

Which of the following keyloggers can’t be detected by anti-virus or anti-spyware products?

Joseph has just been hired on to a contractor company of the Department of Defense as their senior Security Analyst. Joseph has been instructed on the Company’s strict security policies that have been implemented and the policies that have yet to be put in place. Per the Department of Defense, all DoD users and the users of their contractors must use two- factor authentication to access their networks. Joseph has been delegated the task of researching and implementing the best two-factor authentication method for his company. Joseph’s supervisor has told him that they would like to use some type of hardware device in tandem with a security or identifying pin number.

Joseph’s company has already researched using smart cards and all the resources needed to implement them, but found the smart cards to not be cost effective. What type of device should Joseph use for two-factor authentication?