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CryptoGuard VPN 4000
VPN encryptor

CompuGuard VPN 4000 was an encryption/decryption device for the end-to-end protection of IP-based Virtual Private Networks (VPN), developed by Compumatica in Uden (Netherlands) and Aachen (Germany) in 2003. It was suitable for fast (100 Mbps) TCP/IP computer networks.

CompuGuard VPN 4000 is housed inside a deep heavy 1U 19" rackmount case. Apart from the power switch, the unit has no physical controls.

At the rear are two RJ45 UTP sockets for the connection of the unprotected outside network (cipher) and the Local Area Network (LAN) that has to be protected (plain). At the front are four indicator lights that show correction operation of the PSU, the status of the unit, any network traffic and a failure of the fan. Also at the front panel is an RS-232 configuration port for the connection of a standard serial VT102 terminal.
  
Front panel

In order to minimise downtime in case of a system failure, it was possible to connect two VPN 4000 units together as a redundant system. The two units were linked via a 9-pin RS-232 cross-over cable connected to the redundancy ports at the rear. In case of a system failure, the backup system would automatically take over the identity and security tasks of the 'master' system.

The CryptoGuard family of devices was initially developed by KryptoKom (later Utimaco) in Aachen (Germany) in 1993. In 2002, Utimaco Safeware GmbH was taken over by Compumatica and was renamed to Cryptomatica Aachen GmbH. In 2004, the CryptoGuard products were approved by the BSI for military use in Germany (VS-NfD). In The Netherlands, the VPN 4000 was approved by the AIVD/NBV for the protection of information up to the level of RESTRICTED.

CryptoGuard VPN 4000 Front panel CryptoGuard VPN 4000 front panel Network connections at the rear
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Network connections at the rear

References
  1. Compumatica, CryptoGuard VPN 4000, version 4500
    Operating Manual (German, English). January 2003.

  2. Compumatica, Compumatica Company Profile
    PDF file, 6 pages, 9 October 2009.
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Crypto Museum. Created: Sunday 10 November 2013. Last changed: Friday, 23 February 2018 - 22:08 CET.
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