Security testing with hping
Firewalls and Session State
Suppose you want to determine how well your firewall is able to record requests for Microsoft protocols across the network. To use hping3 to generate the packets for this test, issue the following commands:
hping www.acme.net -S -c 1 -p 139 hping www.acme.net -S -A -c 1 -p 139 hping www.acme.net -S -A -c 1 -p 135
These commands generate packets that the firewall – if its capability for maintaining state is working – will record. To verify this, you'll need to check the firewall's logs and use a packet sniffer.
Christmas Tree Packet
A Christmas tree packet  is a TCP packet that has almost every flag set, which is useful for bypassing firewalls and for launching various other forms of attack.
To create a Christmas tree packet using hping3, issue the following command:
hping3 -F -P -U 10.44.45.15 -p 0
Firewalls and Time Stamps
In many cases, a firewall will automatically drop packets that don't have a time stamp. To add a time stamp to your packets, use the -timestamp option in your command:
hping3 -S 18.104.22.168 -p 80 --tcp-timestamp
The results will help you determine whether you need to enable timestamp filtering on the firewall.
Buy this article as PDF
Popular desktop environment continues the Gnome 2 legacy – with new support for the Gnome 3 toolkit.
New program will dial up security for the Firefox browser.
Red Hat's community distro embraces the cloud.
New partnership will bring more and better CS training to US schools
Criminals offer online help over Tor network
Sophisticated malware is still present on Joomla and WordPress sites around the world.
New release marks the arrival of AMD’s unified driver strategy.
A new study by IDC charts big changes in the big hardware market.