QUESTION: 93

Which of the following commands runs snort in packet logger mode?

./snort -dev -h ./log
./snort -dev -l ./log
./snort -dev -o ./log
./snort -dev -p ./log

Answer(s): B

Explanation:

Note: If you want to store the packages in binary mode for later analysis use./snort
-l./log -b

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QUESTION: 94

Which of the following command line switch would you use for OS detection in Nmap?

-D
-O
-P
-X

Answer(s): B

Explanation:

OS DETECTION: -O: Enable OS detection (try 2nd generation w/fallback to 1st) - O2: Only use the new OS detection system (no fallback) -O1: Only use the old (1st generation) OS detection system --osscan-limit: Limit OS detection to promising targets --osscan-guess: Guess OS more aggressively

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QUESTION: 95

You ping a target IP to check if the host is up. You do not get a response. You suspect ICMP is blocked at the firewall. Next you use hping2 tool to ping the target host and you get a response. Why does the host respond to hping2 and not ping packet?

[ceh]# ping 10.2.3.4
PING 10.2.3.4 (10.2.3.4) from 10.2.3.80 : 56(84) bytes of data.
--- 10.2.3.4 ping statistics ---
3 packets transmitted, 0 packets received, 100% packet loss
[ceh]# ./hping2 -c 4 -n -i 2 10.2.3.4
HPING 10.2.3.4 (eth0 10.2.3.4): NO FLAGS are set, 40 headers + 0 data bytes

len=46 ip=10.2.3.4 flags=RA seq=0 ttl=128 id=54167 win=0 rtt=0.8 ms len=46 ip=10.2.3.4 flags=RA seq=1 ttl=128 id=54935 win=0 rtt=0.7 ms len=46 ip=10.2.3.4 flags=RA seq=2 ttl=128 id=55447 win=0 rtt=0.7 ms len=46 ip=10.2.3.4 flags=RA seq=3 ttl=128 id=55959 win=0 rtt=0.7 ms
--- 10.2.3.4 hping statistic ---
4 packets tramitted, 4 packets received, 0% packet loss round-trip min/avg/max = 0.7/0.8/0.8 ms

ping packets cannot bypass firewalls
you must use ping 10.2.3.4 switch
hping2 uses TCP instead of ICMP by default
hping2 uses stealth TCP packets to connect

Answer(s): C

Explanation:

Default protocol is TCP, by default hping2 will send tcp headers to target host's port 0 with a winsize of 64 without any tcp flag on. Often this is the best way to do an 'hide ping', useful when target is behind a firewall that drop ICMP. Moreover a tcp null-flag to port 0 has a good probability of not being logged.

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QUESTION: 96

You have initiated an active operating system fingerprinting attempt with nmap against a target system:
[root@ceh NG]# /usr/local/bin/nmap -sT -O 10.0.0.1
Starting nmap 3.28 ( www.insecure.org/nmap/) at 2003-06-18 19:14 IDT Interesting ports on 10.0.0.1:
(The 1628 ports scanned but not shown below are in state: closed) Port State Service
21/tcp filtered ftp 22/tcp filtered ssh 25/tcp open smtp 80/tcp open http 135/tcp open loc-srv
139/tcp open netbios-ssn 389/tcp open LDAP 443/tcp open https 465/tcp open smtps 1029/tcp open ms-lsa 1433/tcp open ms-sql-s
2301/tcp open compaqdiag 5555/tcp open freeciv 5800/tcp open vnc-http 5900/tcp open vnc 6000/tcp filtered X11
Remote operating system guess: Windows XP, Windows 2000, NT4 or 95/98/98SE Nmap run completed -- 1 IP address (1 host up) scanned in 3.334 seconds

Using its fingerprinting tests nmap is unable to distinguish between different groups of Microsoft based operating systems - Windows XP, Windows 2000, NT4 or 95/98/98SE. What operating system is the target host running based on the open ports shown above?

Windows XP
Windows 98 SE
Windows NT4 Server
Windows 2000 Server

Answer(s): D

Explanation:

The system is reachable as an active directory domain controller (port 389, LDAP)

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