State of Nebraska
Nebraska Information Technology Commission
Standards and Guidelines

NITC 5-202

1. Purpose

It is important to take steps to protect the state’s computing environment against the threat of viruses. Email attachments with certain extensions are often used in virus attacks because of their execution access and the amount of damage they can cause. Therefore, the State of Nebraska prohibits certain attachments from being transmitted through email.

2. Standard

2.1 Removing Prohibited Attachments Before Delivery

The SMTP gateway will remove any prohibited attachments before allowing the email to be delivered. If any of the blocked extensions are detected, the attachment will be deleted and a message stating that the attachment was blocked will be included in the email message.

2.2 List of Extensions - Attachments which will be blocked

Attachment A, entitled "List of Extensions - Attachments which will be blocked," contains the current listing of attachments which will be blocked by the State of Nebraska.

2.3 Alternative Methods for Sending or Receiving Files

If an individual needs to send or receive a file with one of the blocked extensions, other alternatives for transmitting files should be considered, such as: Secure file transfers (sFTP / FTPS) or Web-based document retrieval.

 

Attachment A: List of Extensions - Attachments which will be blocked

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HISTORY: Adopted on November 13, 2003. Amended on November 12, 2008.
PDF FORMAT: http://nitc.ne.gov/standards/5-202.pdf
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