Hundreds of popular websites -- including Google, Facebook, Yahoo and Bing -- are participating in a 24-hour trial of a new Internet standard called IPv6
on June 8, prompting worries that hackers will exploit weaknesses in this emerging technology to launch attacks.
Dubbed World IPv6 Day
, the IPv6 trial runs from 8 p.m. EST on Tuesday until 7:59 p.m. EST on Wednesday.
"In the last five months, there has been a huge increase in DDoS attacks," says Ron Meyran, director of product marketing and security at Radware
, a network device company that is not participating in World IPv6 Day. "IPv6 is going to be even easier for attackers ... because IPv6 traffic will go through your deep packet inspection systems uninspected."
Meyran says another concern is that IPv6 packet headers are four times larger than IPv4 headers. This means routers, firewalls and other network devices must process more data, which makes it easier to overwhelm them in a DDoS attack.
"With a DDoS attack, you need to reach 100% utilization of the networking and security devices to saturate the services," Meyran says. The longer headers in IPv6 "must be processed completely to make routing decisions."
"I wonder if there's going to be any sort of DDoS type of things going on ... or hackers probing servers that are dual-stack enabled [running IPv6 and IPv4 at the same time],'' says Jean McManus, executive director of Verizon's Corporate Technology Organization, which is participating in World IPv6 Day
. "Content providers need to be careful and watch to make sure that everything is appropriately locked down."
Many security threats related to IPv6 stem from the fact that the technology is new, so it hasn't been as well-tested or de-bugged as IPv4. Also, fewer network managers have experience with IPv6 so they aren't as familiar with writing IPv6-related rules for their firewalls or other security devices.
"We know from security breaches that the security rules that allow you to see the network and applications better ... is where there is a lack of training and expertise with IPv6," Meyran says. "The new software is much more complex ... and there are much less programmers familiar with it."
World IPv6 Day participants say the event was advertized to everybody in the Internet engineering community, including hackers, and they are beefing up the security measures on their sites accordingly.
"This is a well-publicized event," says John Brzozowski, distinguished engineer and chief architect for IPv6 at Comcast, which is participating in World IPv6 Day
both as a provider of IPv6-based cable modem services and as an operator of seven IPv6-enabled websites. "Anything can happen. IPv6 is no different than any other new technology. The potential [for attacks] is there. Protecting the network is key to us."
Brzozowski says Comcast will be monitoring its network for signs of attack throughout the trial. "We're taking the necessary steps so that the Comcast infrastructure is protected," he adds.
says that if its website comes under DDoS or other attack on World IPv6 Day, it will simply switch back to IPv4. "We can revert back to IPv4 in about five minutes," says Alain Durand, director of software engineering at Juniper, which is using its own translator-in-a-cloud service to IPv6 enable its main website for the day.