, Kerberos- 䳿 Kerberos. 볺, 䳿 Kerberos-, , 䳿 Kerberos, .
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Kerberos- , , , . Kerberos- ( ) 볺 . ϳ 볺, , 䳿 Kerberos-, Kerberos . , , Kerberos- , Kerberos- . ³ (, , , ) , 볺 Kerberos-. ' .
, , , Kerberos- ' Kerberos-. Kerberos-. Kerberos- 䳿, Kerberos-. , Kerberos-, Digital Equipment , -, , Kerberos-. , , Kerberos- .
Kerberos-5
Kerberos , . , Kerberos, ' , RFC 1510. Kerberos , .
䳿 볺, , ' .
' Kerberos-, . , , .
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Kerberos DES (Data Encryption Standard - ), , , DES.
Kerberos .
, , , Kerberos , ' (, , - ), .
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, . 13.12. , ' . , . ' Newcastle ("") , , ѳ-. , ' , , . ³ , , , , . "" mount. , , , , . ' "" : ( , , ' ) ( ). , - .
*1. exit . , ? '? 2. SIGKILL; , , . *3. exec . *4. , ? *5. , ' ? ? 6. , . execl("/../sftig/bin/sh","sh",0); , , , . , . 7. ' Newcastle , ѳ-? *8. ϳ exec , , ' Newcastle . ϳ . . *9. exit ' Newcastle -, . . , , ?*10. ' Newcastle, , , ".." ( ), ? 11. , ' . , ? , ' Newcastle?*12. - ?*13. , "" link, , exec, ' . ': .*14. --- , . , . , -, ' , -. , . +----------+ +----------+ +----------+ | 볺 A | | 볺 B | | 볺 C | +----------+ +----------+ +----------+ - - - - - - getty- - - - - - - - - - - - - - - - - - - +-------------------------------------------+ | - - - - - - | +-------------------------------------------+ | | | | | | tty00 tty01 tty02 tty03 tty04 tty05 1.13. *15. , , , . , "break", . , , ( 13.13). getty-. -, , . open , , ' . , "break", , ?*16. ' - , . , ' ( ) , . .*17. . , ?*18. , ( ) . , . , , ' 볺.*19. , , . ' "/usr/src/uts/3b2/os", "/usr" - , A, "/usr/src" - B, "/usr/src/uts/3b2" - C. "" (multihop). , A C ', B . "" ' Newcastle "" .
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