Mydomain.com, NamesDirect.com felled by DOS Attack

Firewall overflow

Mydomain.com and NamesDirect.com are back on air, after recovering from a "HUGE" Denial of Service attack.

This is the explanation for what went wrong with the sites which were offline most of yesterday, posted in service announcement on the Mydomain.com support forum.

About 3am Pacific, a Denial Of Service attack/ HUGE influx if DNS queries bombarded our main co-lo facility in Seattle. In the following hours everything on that network became extremely slow making most of the services provided on that network (DNS,URL forwarding, Email Forwarding, websites, DB) appear unavailable or really slow to anyone outside the network. This kind of activity has happened before but never of this magnitude.

The unfortunate side effect of this activity is that it overloaded both the primary and secondary firewalls causing them to reset connections about every 2 minutes. Meanwhile, our senior network engineer was woken up and after having no luck with a remote fix headed to our co-lo facility. He arrived to find the firewalls rebooting under a large deluge of traffic. He couldn't even get information off of the firewalls about what was actually happening.

In the meantime, the downtime at our co-lo in Seattle caused all DNS to be directed to our east coast facility. The facility also was brought down by the volume in traffic. As we tried to diagnose what the problem was so that we could know what to cut off, the traffic just kept coming and the forums were on fire. The forums stayed up because they're hosted separately from all of the other servers. We couldn't even get into the mydomain website to post a notice about 'system problems'. After some conflict with the co-lo provider, finally at 5pm PST, they filtered out all traffic destined for the mydomain nameserver in the Seattle co-lo. This immediately enabled all services on that network to the outside world. While we cleaned up things, we discovered that the mydomain site and db had seriously crashed and had to be worked on. Hence the extra downtime on the mydomain site after some services appeared to be up. Unfortunately this problem caused a problem with email forwarding for awhile that was eventually fixed.

Sponsored: 5 critical considerations for enterprise cloud backup