Comcast Internet users found themselves unable to access archive.org starting late Thursday afternoon due to Comcast blocking access to our site. The earliest time Comcast users reported problems was around 4:30 PM PST and access was restored around 6:15 AM the next day (a span of about 13 hrs 45 min).
Comcast informed us that the block was put into place due to detection of an apparent Xfinity-branded phishing page posted to archive.org by an uploader. According to Comcast, we had taken that page down promptly, but Comcast’s block was nevertheless implemented without notice on late Thursday afternoon. Hours after our reporting the blocking to friends at Comcast they diagnosed the issue, removed the block and restored their customers’ access to archive.org.
In addition to a significant number of archive.org users, some of our employees use Comcast for access and were unable to do some of their work during the block. This was also reported on in Vice’s Motherboard.
We searched our communications for any reports from Comcast preceding the block and found only one email sent to us Thursday morning reporting a phishing page, which we took down promptly. Sent by an outside security company working for Comcast, the email did not mention any possibility of a block. The email and our removal of the item preceded the first known instance of the block by about eight hours.
This is the gist of what we know at this point. We continue to gather information and take this incident very seriously.