Mediaboss Marketing

BOULDER, Colo.--(BUSINESS WIRE)--

Xerocole, the intelligent broadband DNS company, today announced that its CTO, noted Internet expert and National Public Radio technology commentator Rob Fleischman, has published his list of the biggest domain name system (DNS) challenges that face broadband providers when they flip the switch on World IPv6 Launch Day. IPv6 is the new internet protocol that replaces IPv4, and provides a virtually unlimited number of IP addresses. It will enable every Internet-connected device in the world computer, phone, tablet, car, refrigerator, etc. to have a unique IP address, but this flexibility will impose new challenges on internet service providers (ISPs).

A short video of Rob Fleischman explaining the potential DNS pitfalls associated with IPv6 deployments is available here.

Click to Tweet: #Xerocole video exposes #DNS pitfalls for #WorldIPv6LaunchDay http://bit.ly/Lgg0CT

Most of the equipment and software used by internet service providers has been IPv6 compliant for a while, said Rob Fleischman, CTO of Xerocole.

They have tested to see whether their domain name system (DNS) servers can make IPv6 queries, known as AAAA queries, and they seem to work. We decided to scratch the surface to find what, if anything, ISPs should be worried about once the switch to IPv6 happens on a global scale, he added.

As it turns out, there are a few issues that could cause broadband internet providers some problems, which are worth sharing, he concluded.

Top DNS Challenges for ISPs in an IPv6 World

Some versions of desktop operating systems will make AAAA record queries regardless of whether they have an IPv6 connection or not. This can result in timeouts as those desktops try to initiate IPv6 connections (which they can't) to hosts that publish AAAA records to the world. Eventually, those attempts will timeout and the host will retry using IPv4. This has the potential to light up ISP call centers with customer service complaints.

Since Antispam DNSBL usage involves checking SMTP inbound IPs against a remote DNS zone, the use of IPv6 explodes the number of potential address checks. A single IPv6 allocation can arm a spammer with enough unique addresses to try against an operators mail server for thousands of years. The result? If a mail server makes all those DNSBL lookups against a carriers DNS, it can easily result in "cache-busting"/DOS-style behavior.

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Xerocole CTO Exposes Biggest Challenges Facing Internet Service Providers on World IPv6 Launch Day