When an organization runs a wireless LAN, however, issues can arise at the data link layer, even though the confidentiality...
of VPN users' transmitted data is secure.
For example, consider DNS traffic. Wireless networks using the VPN security model must allow unauthenticated users' DNS traffic through the firewall so that VPN clients may verify and locate their endpoints. A few years ago at DefCon, a popular hackers' convention, security researcher Dan Kaminsky introduced a technique called DomainCasting. Such a hacking method allows individuals to gain free Internet access by using DNS traffic as a covert channel. Individuals can use this technique to gain unauthorized entry into a wireless network.
An access control technique, like the 802.1X networking standard, can extend protection to the data link layer. To learn more about implementing 802.1x on your wireless network, read the Information Security magazine article: The X Factor.
Dig Deeper on Wireless network security
Related Q&A from Mike Chapple
It's not possible to eradicate the risk of DoS attacks, but there are steps infosec pros can take to reduce their impact. Mike Chapple shares ...continue reading
The HHS OCR ruled that healthcare ransomware attacks are HIPAA violations, so these covered entities need to react according to the HHS's guidance. ...continue reading
HIPAA regulations incorporate NIST guidelines and standards, so do healthcare organizations need to be compliant with both? Expert Mike Chapple ...continue reading
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.