Service Providers (ISPs), including Penn and commercial ISPs such as
Verizon, use the Domain Name System (DNS) to translate alphabetic
computer names into their corresponding numerical addresses, eg.
, etc. Without DNS services, users would have to remember and use these numerical sequences.
For security reasons, Penn needs to restrict access to its own DNS servers to on-campus users only. Beginning July 11th, Penn’s DNS service will therefore stop accepting name translation requests from off-campus computers.
On-campus Internet users will not be affected by this change. Nor will most off-campus users be affected; they are likely using their ISP’s DNS service already. However, any off-campus users who have manually configured their computer with Penn’s DNS servers will need to alter their configuration.