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Automatisk anslutningsfrånkoppling
TCP-anslutningen kopplas automatiskt ifrån efter 30 sekunder från det att
anslutningen upprättades, om ingen kommunikation sker.
Projektorn accepterar inga kommandon utan att autentiseringen sker, när
autentisering har aktiverats. Projektorn använder en autentisering av Challenge
Response-typ med en MD5-algoritm (Message Digest 5).
När projektorn använder ett LAN returneras slumpmässigt 8 byte om autentisering
har aktiverats. Bind dessa mottagna 8 byte och autentiseringslösenordet,
kombinera dessa data med MD5-algoritmen och lägg till resultatet före de
kommandon du skickar.
Nedan visas ett exempel när autentiseringslösenordet är “password” och de
slumpmässiga 8 byten är “a572f60c”.
Autentisering
1) Anslut projektorn.
2) Erhåll de slumpmässiga 8 byten “a572f60c” från projektorn.
3) Bind de slumpmässiga 8 byten “a572f60c” och autentiseringslösenordet
“password” vilket ger “a572f60cpassword”.
4) Kombinera bindningen “a572f60cpassword” med MD5-algoritmen.
Detta ger “e3d97429adffa11bce1f7275813d4bde”.
5) Lägg till dessa “e3d97429adffa11bce1f7275813d4bde” framför kommandona
och skicka sedan data.
Skicka “e3d97429adffa11bce1f7275813d4bde”+kommando.
6) När du de data som skickas är korrekta utförs kommandot och svarsdata
returneras. Annars returneras ett autentiseringsfel.
• Vid överföring av det andra och efterföljande kommandon kan
autentiseringsdata utelämnas, så länge det gäller samma anslutning.
NOTERA
7.4 Kommandokontroll via nätverket (fortsättn.)
7. Andra funktioner
198


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