Archive for May 27, 2011

PacketFence – Open Source Network Access Control

 PacketFence – Open Source Network Access Control (NAC) System

PacketFence is a fully supported, trusted, Free and Open Source network access control (NAC) system.

Boasting an impressive feature set including a captive-portal for registration and remediation, centralized wired and wireless management, 802.1X support, layer-2 isolation of problematic devices, integration with the Snort IDS and the Nessus vulnerability scanner; PacketFence can be used to effectively secure networks – from small to very large heterogeneous networks.

What you can do with PacketFence :

Block iPods wireless access
Forbid rogue access points
Perform compliance checks
Eliminate Peer-to-Peer traffic
Provide guest access
Simplify VLAN management


Google Redirect Virus

Is the Google Redirect Virus Lurking Inside Your Computer ?

It should be quite easy to tell. Google Redirect Virus is a very annoying threat that manipulates results whenever you use the Google search engine. Google search appears to work as it should, but the virus redirects the results to malicious and potentially harmful websites. Apart from this, computer processes are bogged down and the computer begins to perform incredibly slowly, and certain sites (such as tech support sites) become unavailable to the victim of the virus. It will infect all your browsers, and bug you as you attempt to install new programs and run old ones.


Welcome to the World of Browser Hijackings
Once infected, what the user immediately notices is the annoying redirection of search engine results and the slowness of the computer. More than the irritation that stems from this hijacking, however, is the serious possibility of opening up your computer to even more frightening attacks.
Now that your browser has been hijacked, your search engine results may redirect you to malicious websites that are saddled with all forms of adware, spyware and malware. Unwittingly, you are bringing in even more attackers to further weaken your computer. Spyware, in particular, may be used to record your private and sensitive information such as passwords, social security numbers and credit card accounts.
Having identified the nasty virus threatening your computer, the logical next step is to find a way to get rid of it. It is the very nature of the Google Redirect Virus to worm its way into unknown nooks and crannies of your computer, and it will be quite difficult to fully purge it out of your system. One way to find the virus is to utilize a reliable antivirus program that can catch the Google Redirect Virus.
The antivirus program should be updated regularly, as threats to your computer are growing and improving every day. A good program should be able to catch the threats lurking on your computer.
This, however, is just the first step. Even the best antivirus programs might not be able to clean the after-effects of the Google Redirect Virus completely. Manually, check and remove all malicious remnants of the virus in registry entries, browser help objects, browser add-ons and dynamic link library files. Then clear your browser cache, empty Recycle Bin and restart your computer to ensure that all remnants of the virus are wiped out.
But this is just the elimination of the original Google Redirect Virus; what about the removal of the other spyware and malware brought in by the malicious pages you were redirected to? Install a reliable and updated spyware removal program that will eliminate the trackers that mine your personal data and make your computer vulnerable to more attacks. Good spyware removal tools should be able to identify a wide range of threats and keep your computer safe from future attackers.
Finally, the best cure is still prevention. Keep your computer safe with an arsenal of anti-virus and spyware removal programs. Update these regularly and do scheduled scans to make sure that no threat can ever lurk in your computer again.
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Fast Traffic Generator


Mausezahn – fast traffic generator


Mausezahn is a free fast traffic generator written in C which allows you to send nearly every possible and impossible packet. It is mainly used to test VoIP or multicast networks but also for security audits to check whether your systems are hardened enough for specific attacks.
Mausezahn can be used for example:
  • As traffic generator (e. g. to stress multicast networks)
  • To precisely measure jitter (delay variations) between two hosts (e. g. for VoIP-SLA verification)
  • As didactical tool during a datacom lecture or for lab exercises
  • For penetration testing of firewalls and IDS
  • For DoS attacks on networks (for audit purposes of course)
  • To find bugs in network software or appliances
  • For reconnaissance attacks using ping sweeps and port scans
  • To test network behaviour under strange circumstances (stress test, malformed packets, …)
…and more. Mausezahn is basically a versatile packet creation tool on the command line with a simple syntax and context help. It could also be used within (bash-) scripts to perform combination of tests.
Currently Mausezahn is only available for Linux platforms.
As of version 0.38, Mausezahn supports the following protocols:
  • ARP
  • BPDU or PVST
  • CDP
  • LLDP
  • IP
  • IGMP
  • UDP
  • TCP (stateless)
  • ICMP (partly)
  • DNS
  • RTP optionally RX-mode for jitter measurements
  • Syslog