AS4.NET is an open-source application that implements the OASIS AS4 specification. It supports both the e-SENS e-Delivery and the EESSI AS4 Messaging profile as an ebMS endpoint.
Since version v3.0.0, AS4.NET can also act as an intermediary MSH (i-MSH) with message forwarding support and MEP bridging.
The component has been conformance tested against the e-SENS eDelivery specifications.
Testing against the EESSI AS4 Messaging Profile has also been conducted.
AS4.NET is interoperable with multiple other AS4 gateway providers; AS4.NET has undergone performance and interop-tests against Holodeck B2B, RSSBus, Domibus, Flame Message Server and IBM B2B.
AS4.NET can be downloaded from the following locations:
- AS4.NET v4.0.1
- AS4.NET v4.0.0
- AS4.NET v3.1.0
- AS4.NET v3.0.0
- AS4.NET v2.0.1
- AS4.NET v2.0.0
- AS4.NET v1.1.0
- AS4.NET v1.0.0
A configuration- and usermanual can be found online.
- One-Way/Push message exchange pattern
- XML based configuration
- XML based PMode configuration
- Dynamic PMode override
- Multiple submit, notify and deliver agents
- FILE based receivers and senders
- Signing and encryption using WS-Security
- AS4 Compression
- AS4 Reception Awareness and Retry
- AS4 Duplicate Detection and Elimination
- Submit, deliver and notify via HTTP protocol
- Submit and deliver attachments via HTTP protocol
- One-Way/Pull pattern as initiator
- Support for sub channels in One-Way/Pull pattern
- Support for multi-hop AS4 profile
- Support for TLS client certificates
- Performance tuning for large messages, up to 2GB
- Performance tuning for high volume processing
- Web interface for configuration
- Web interface for monitoring
- Web interface for user management
- Web interface for testing
- One-Way/Pull pattern as responder
- Support for sub-channels
- Support for message forwarding
- Support for MEP bridging
- Support for PullRequest authorization
- Support for SMP/SML dynamic discovery
- Support for TLS server side
- Continued performance tuning for large messages, up to 3GB
- Continued performance tuning for high volume processing
- Improvements to the internal messaging engine
- Configurable payload naming when delivering on filesystem
- Continued performance tuning for large messages and high volume processing
- Intermediary MSH functionality with message forwarding including MEP bridging support
- Static Submit support
- Possibility to run the AS4.NET MSH as a Windows Service
- Improved Dynamic Discovery implementation
- Dynamic Forwarding support
- Improved high availability support
- Support for Non-Repudiation of Receipt verification
- Support for automatic Message Cleanup
- Optionally allow that a message is signed with a certificate coming from an unknown CA authority when verifying message signatures
- Web interface for SMP Routing Configuration
- Improvements in the web interface for configuration
- Improvements to the internal messaging engine
- Retry functionality for deliver operation
- Retry functionality for notify operation
- Static Receive support
- Improvements in the web interface for configuration
- Improvements in the internal messaging engine
- Support for the OASIS BDX dynamic discovery profile
- Support for sending response signal messages via reliable piggybacking in a pull receive scenario
- Allow the AS4.NET Windows Service MSH to be installed via an MSI
- Control the AS4.NET Windows Service MSH via a system tray application
- Improved Receiving PMode matching proces when multiple from-parties / to-parties are specified in the AS4 Message or in the Receiving PMode
- Allow dynamic discovery based on the sender information in the SubmitMessage or in case of a forwarding scenario on the sender information in the AS4 Message
- Support for internal journal logging to track down operations executed on the message (compress/decompress, signing/verify, encrypt/decrypt)
- Support for receiving bundled message units
- Configurable submit payload retrieval path location
- Configurable pull authorization map path location
- Improvements in the web interface for pmode and agents configuration
- Improvements to the internal messaging engine
This version doesn't support Sending PModes anymore as a way to respond to AS4 messages but uses the Receiving PMode for this. Please update your Receiving PModes, for more information see: Remove Sending PMode as responding PMode.
- DynamicDiscovery settings that can be defined in the Sending PMode are no longer case-sensitive
- Bugfix: Send retry-functionality (receptionawareness) was not working in v4.0.0 when
IsMultihopwas enabled in the Sending PMode. This issue is fixed in v4.0.1. - Bugfix: When AS4.NET v4.0.0 is configured to receive messages via pulling, response signal messages were created but were never sent. This issue is fixed in v4.0.1.
The following third party libraries are used by AS4.NET runtime:
- BouncyCastle (MIT License)
- FluentValidation (Apache 2)
- Mimekit (MIT License)
- Nlog (BSD License)
- Polly (BSD License)
- SQLite (Public Domain)
- Remotion (Apache 2)
This software is licensed under the EUPL License v1.1.