What is AS2?


Short for Applicability Statement 2, AS2 is a standard used to securely send and receive files over the Internet. The messages are built using S/MIME format and can be compressed, signed, and encrypted. They are then sent over an HTTPS encrypted tunnel, making this method of transferring files very secure. This standard also implements Message Disposition Notifications (also known as MDNs or receipts) to guarantee the successful delivery of the message from the AS2 server.

Learn more about AS2 

How is it used in GoAnywhere?

drummond certification logo 4Q 2021

GoAnywhere MFT is Drummond Certified. This provides a high degree of security assurance and offers compatibility with other applications that send AS2 file transfers.

Use GoAnywhere’s built-in SSL certificate manager to define AS2 server certificates. These AS2 trading partner certificates can be imported into the product, making it easy to verify the authenticity of your senders. Dual-factor authentication using passwords and SSL certificates is also supported if you need additional server security.


GoAnywhere offers users full audit capabilities. Use its auditing and reporting features to track all AS2 activity, including who sends a message, what encryption algorithm they used, the Message Integrity Check, whether the message was digitally signed, and more.

In addition, once the message is received, GoAnywhere can automatically reply to senders with an MDN receipt. Otherwise, the product can be configured to require manual verification of messages before receipts are processed.

Learn how AS2 file transfers work in GoAnywhere MFT.

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Standards Support for AS2 Server

GoAnywhere provides support for the following standards:

AS2 Server Features

  • Multiple attachments
  • Chunked transfer encoding
  • Filename preservation
  • Full audit trail
  • Real-time message processing
  • Signed and unsigned receipts
  • File size restrictions
  • File name/extension restrictions
  • Automatic/manual MDN approval

SSL/TLS Versions

  • SSL 2.0
  • SSL 3.0
  • TLS 1.0
  • TLS 1.1
  • TLS 1.2

Encryption Algorithms

  • AES-128
  • AES-192
  • AES-256
  • RC2
  • Triple DES (DESede)
  • Cast5
  • Idea

Authentication and Key Exchange Algorithms

  • Diffie-Hellman
  • DSA
  • RSA

Signature Algorithms

  • MD5
  • SHA-1
  • SHA-2
  • SHA-224
  • SHA-256
  • SHA-384
  • SHA-512

Certificate Key Store Formats

  • JKS (Java Key Store)
  • PKCS12

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