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By the term LAN analysis and/or network analysis one understands the investigation of the data traffic, which will receive local AREA in the network (LAN) between the participating computers sent and/or.

The LAN analysis as term covers all procedures for the investigation of the data, which will receive over the media of a local data network sent and/or. Thus less the espionage of private data is meant as the technical monitoring and/or the diagnosis of technical errors, which the availability and/or security of the data and services impair (t) EN. LAN analysis is operated rarely only per-actively because of the considerable expenditure and substantial need of specialist knowledge rather only reactively (in the case of loss), (to the Vorbeugung).

Tools

Classical LAN Analyzer examines the data traffic in real time, while the contact is given to the transmitting medium; well-known products are about: Sniffer (network general), EtherPeek (WildPackets), Observer (network of instrument) or Ethereal (open Source/GPL). Newer developments aim at the off-line analysis of the noted measuring data, about: TraceMagic (synapse network). The term "“Sniffer"” stands in the meantime for the entire kind of the LAN Analyzer.

Purpose/perspective

The obligation to hold the availability of the data and services with constantly 100% to make leads to ever higher expenditure to meet errors either immediately after their occurrence or by preventing measures the occurrence of errors already practically impossible. As far this ideal could be ever achieved, is just as uncertain as the answer to the question, which expenditure for the goal may appear appropriate and/or justified. Technicians are inclined to operate to it, rather more than less Analyse=Kontrolle to get (in order not later "“black Peter"” in the case of loss pushed over); Buyers are inclined rather to save at short notice costs - with the risk to risk on a long-term basis disturbances or even the total failure.

Data security vs. data privacy

Still interests of data security are last affected: In order to meet attacks with viruses, Trojanern, etc., is sequential analysis/observation of the data network obligation. On the other hand the data privacy is to be considered after data protection act as well as operating law of codetermination and labor management relations likewise; so e.g. no secret automated efficiency control of the coworkers may be operated, and the measuring data may not be stored on indefinite time for indefinite purpose. Here to become fair and "“LAN analysis"” to just as moderate as effective extent operating, is mostly possible for all interests, but in individual cases difficult.

Zwielichtige applications

The borders between tools of the LAN analysis (on the one hand) and hacker Tools (on the other hand) are flowing. In this gray area there is software, which can be evaluated times in such a way, times in such a way.

In the broadest sense also purposeful spying of data and of user behaviors falls under the term of the network analysis. Like that the secret services of this world are very much interested in it, the enamels of their citizens on-line and in real time to scanning. The borders are also here between "“forbidden"” and "“permitted"” much blurred.

Also respectable tools of the LAN analysis can very probably be abused for these purposes.

Literature

  • Aurand, Andreas: LAN security (2004), dPunkt publishing house, 524 sides, ISBN 3-89864-297-6.
  • Interest publishing house, collection of sheets: Enterprise, analysis and Troubleshooting of WLANs, ISBN 3-8245-1451-6.
  • Interest publishing house, collection of sheets: LAN analysis and - Troubleshooting, ISBN 3-8245-1450-8.
  • Walther, franc: Networker's Guide (2000,2003), Munich: Markt+Technik, 702 sides, ISBN 3-8272-6502-9.

See also

  • WLAN Sniffer
  • Keylogger
  • Network analysis

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