-. ? , , ? . , , , , , .. . , . (, System Scanner).
, :
1. (back door) ;
2. ;
3. ;
4. , Web- .
, . , . , IP, TCP, HTTP, FTP, SMTP .., , .
, (scan) (probe).
, . . ISS (inference). , , (banner), . , . .
, , . , . , , . ISS (verification). , ( ), .
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(banner check). , . Sendmail FTP-, .
.
(active probing check). . , (fingerprint) . , , . ( ) (). , . . , , .
(exploit check). , . . , exploit check, , , ( ) . , , , .
, . , . (, ), ( ) . , , .
(, Packet Storm), . : , . , , CyberCop Scanner Scanner. Denial of service ( ). Scanner WARNING: These checks may crash or reboot scanned hosts (: ).
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ISS, SAFEsuite( ):
Scanner ;
System Scanner ;
RealSecure ;
DBScanner .
. , :
- (. back doors) ;
- , ;
- , ;
, , . firewall , proxy, firewall . , .