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Server Software Solutions for the Military Industry

Isode has been delivering server software product central to military messaging and directory deployments worldwide for more than 20 years.


Email Address
14 Castle Mews,
TW12 2NP,
United Kingdom
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Since 2002, Isode has been developing and supporting commercial off-the-shelf (COTS) software for secure messaging. Our software is at the heart of great solutions, built in conjunction with our partners, for Military, Intelligence and Civil Aviation customers in over 150 countries.

Isode’s products include client, server and gateway software for Email Messaging, XMPP Instant Messaging, Directory and Constrained Networks.

Designed to work over both standard internet-quality links and over Constrained Network links (high-latency and/or low-bandwidth) such as SatCom, HF, VHF and UHF, Isode products are in service with Armies, Navies and Air Forces worldwide.

Secure chat.
Assign clearance.
x-400 configuration.
Sodium pki view.

Email messaging services for use in constrained bandwidth environments

Isode provides email server, gateway and client products for military messaging using STANAG 4406, ACP127 and SMTP protocols, including gateways between these protocols following ACP145 and MIXER. Isode products are ideal for deployment in both standard and constrained bandwidth environments.

The company also provides clients, gateways and servers for deployment as part of a military email solution:

  • ACP127: M-Switch products provide full support for ACP127 and related protocols, including ACP126, ACP128, JANAP128 and DOI103S.something about BRASS.
  • STANAG 4406: Isode’s M-Switch X.400 includes full support for STANAG 4406 (including Annex E for Constrained Network Environments) and,
  • ACP145: Isode M-Switch MIXER can, together with M-Vault (an ACP133 military directory) be configured as an ACP145 Gateway to convert between national variants of S4406.
  • MMHS over SMTP: M-Switch SMTP can provide full military messaging capabilities over the industry standard STMP mail protocol.
  • Email Client: Isode’s Harrier web based military email clients is a modern interface to military messaging compatible with Isode’s server products and Microsoft Exchange.
  • STANAG 5066 Server: Isode’s Icon-5066 is a modem-independent STANAG 5066 server. It enables applications to work efficiently over HF Modems/Radios and to allow multiple applications to work simultaneously.

All Isode Email Server products can be deployed as a local MTA providing one or more of Isode’s supported protocols or as a gateway between any of the listed protocols, as well as SMTP and X.400.

Products are additionally optimised for operation in Constrained Network Environments including support for S4406 Annex E and ACP127 BRASS (Broadcast and Ship to Shore) deployments. Isode’s M-Switch SMTP and M-Switch MIXER also support CFTP (sometimes known as Battle Force Email/BFEM) for simple support of informal SMTP messaging for HF.

XMPP messaging products developed for military use

Isode supplies XMPP server, gateway and client products ideally suited to military deployments over both internet quality networks and constrained networks (low- bandwidth and/or high-latency links such as SatCom and HF Radio).

Isode provides clients, gateways and servers for deployment as part of a military XMPP solution:

  • M-Link User Server: Robust and scalable XMPP server.
  • IRC Gateway: Gateway between XMPP Multi-User Chat rooms and Internet Relay Chat (IRC) Channels.
  • XMPP Boundary Guard: M-Link Edge allows for the application of boundary controls on message traffic, either independently or in conjunction with a High Assurance Guard.
  • XMPP Messaging for Constrained Networks: Isode’s XMPP products for constrained network operations enable efficient use of 1:1 and multi-user chat over HF and SatCom networks.
  • Forms Discovery & Publishing: Publishing, share and subscribe for structured forms (such as MEDEVAC).
  • XMPP Client: Swift multi-platform XMPP client.

Instant messaging is becoming an increasingly important communication option for militaries, particularly for sharing communication with a large number of users with multi-user chat capabilities.

Voice and video communications are often impractical due to networking constraints and/or operational characteristics. Email or formal messaging is often too slow and cumbersome where information sharing and associated decision-making need to appen very quickly.

Directory services to support military messaging

Directory services are a critical military component, used for tactical and strategic systems. Military directories, standardised in ACP 133, are used to provide information services, support of military messaging, and as supporting infrastructure for other applications such as PKI (Public Key Infrastructure).

Isode provides all of the servers and management tools needed to build a military directory.

Directory Server: The M-Vault directory server is the core component of Isode’s offering for military directory, providing:

  • ACP133 Conformance
  • Directory Security & Strong Authentication
  • Replication & Distribution

Directory synchronisation with partner organizations using Sodium Sync.

Constrained network products for HF modems and radios

All of Isode’s products are optimised for use over constrained networks (low bandwidth and/or high-latency) such as SatCom and HF Radio. In addition, Isode produces a modem-independent STANAG 5066 server enabling applications to work simultaneously and efficiently over HF modems/radios.

White Papers

  • HF Vision, Strategy & Road Map

    This whitepaper gives a summary of Isode’s approach to providing products for HF radio, looking at current and future products, explaining the problems being addressed. The paper starts by looking at why HF Radio is an important technology for BLOS (Beyond Line of Sight) communication, despite its technical difficulties.

  • Solution for BRASS

    Broadcast and Ship to Shore (BRASS) is an approach used by navies, particularly in Nato countries, to communicate between ships and shore using high frequency (HF) radio.

  • XMPP Archive and Search

    This whitepaper describes the new archive capability in M-Link, and how it enables searching of archive data by end users and operators.

  • Military Forms Using XMPP

    Forms are important for military operations, and there is often a need to handle forms quickly and share with a large number of users.

Press Releases

  • Isode Announce Release of Harrier 3.1 and Cobalt 1.1

    Isode is excited to announce the release of Harrier 3.1 and Cobalt 1.1. These releases are an important step for our Draft, Review & Release Solution, a capability of particular interest within Military Deployments.

  • UK Software Receives Key Accreditation from DoD

    Isode is pleased to announce that its 'M-Link' instant messaging and multi-user chat server software (based on the XMPP protocol) and 'Swift' desktop client software have been approved for inclusion on the US Department of Defense (DoD) unified communications approved product list (APL).

  • Isode Support for International MMHS Gateways

    ACP 145 was specified to enable communication between CCEB Nations (Australia, Canada, New Zealand, UK, US) by defining a common interface standard for military messaging between nations.

  • Isode at the High Frequency Industry Association

    Isode is pleased to announe that CEO Steve Kille will be speaking at the next meeting of the High Frequency Industry Association (HFIA) meeting in San Diego on 27 January 2011. His talk on 'XMPP over HF using STANAG 5066' covers an area that Isode has invested a lot of time in over the

  • XMPP a 'Notable Interoperability Highlight' at CWID 2010

    The Coalition Warrior Interoperability Demonstration (CWID) is an annual demonstration that showcases information-sharing technologies that can be used by militaries and other government agencies to fill existing operational capability gaps. Initiated by the US, CWID includes participan

  • IMAP Enhancements in iPhone OS Update (iOS 4)

    Apple’s recent update to the iPhone operating system (iOS 4) contains some updates to the device’s IMAP (the Internet standard Internet message access protocol) support. The RFCs now supported are: COMPRESS (4978) ESEARCH (4731) CHUNKING (3030) 8BIT

  • Isode Release New White Paper

    Isode have released a new white paper which looks at how M-Link, Isode's XMPP server is optimized for operation over constrained networks, including satcom, HF radio, and other radio links. The paper starts by looking at the benefits of using XMPP over constrained networks, and the key problems f

  • IPv6 Support (in R14.6)

    This is the first of a series of blog posts describing new features of Isode’s R14.6 release, scheduled for March 2010. IPv6 is the new version of IP. The major change relative to IPv4 (which is the version of IP most widely used) is the much larger address space. While many Isode produ

  • Isode Aims to Create Common XML Security Policy Information File Format

    Isode will work with several leading companies to create a common XML security policy information file (SPIF) format. With the help of Cadmidium, Clearswift, CommPower, eB2Bcom, JSC, Nexor and SMHS, Isode hopes to encourage vendors to use a new system of security labels to exchange inf

Products & services

  • M-Link IRC Gateway: Gateway between XMPP and IRC Deployments

    The M-Link IRC Gateway enables connections between IRC and XMPP servers. The Gateway operates by associating IRC Channels with XMPP Multi-User Chat (MUC) rooms hosted on the Gateway. The MUC rooms can be assessed by XMPP users on connected XMPP servers and by IRC users on connected IRC servers.

  • M-Link for Constrained Networks

    XMPP works efficiently over medium and high speed networks. Many military deployments will use network links with poor and variable quality, such as SatCom and HF Radio, with high latency being a particular problem.

  • M-Link Edge

    The M-Link Edge is used to provide an XMPP Boundary Guard service to protect organizational boundaries and provide Cross Domain services.

  • Swift XMPP Client

    Swift is a modern web chat client, designed to be used anywhere, on any device. It enables you to deploy a high capacity, secure chat solution across your network with zero footprint deployment.

Isode Limited
14 Castle Mews
TW12 2NP
United Kingdom

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