oracle安全性的參數(shù)是什么,很多新手對此不是很清楚,為了幫助大家解決這個(gè)難題,下面小編將為大家詳細(xì)講解,有這方面需求的人可以來學(xué)習(xí)下,希望你能有所收獲。
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Oracle Database11g 增加了一組新參數(shù)以加強(qiáng)數(shù)據(jù)庫的默認(rèn)安全性。這些參數(shù)是系統(tǒng)范圍的靜態(tài)參數(shù)。
(1)使用區(qū)分大小寫的口令以加強(qiáng)安全性
新參數(shù)SEC_CASE_SENSITIVE_LOGON使您可以設(shè)置區(qū)分大小寫的用戶口令。Oracle 建議保留默認(rèn)設(shè)置TRUE。將此參數(shù)設(shè)置為FALSE 可指定不區(qū)分大小寫的口令以實(shí)現(xiàn)向后兼容性。
ALTER SYSTEM SETSEC_CASE_SENSITIVE_LOGON = FALSE
注:禁用區(qū)分大小寫會(huì)使口令在強(qiáng)力攻擊面前變得更脆弱。
(2)防止拒絕服務(wù)(DoS) 攻擊
SEC_PROTOCOL_ERROR_FURTHER_ACTION參數(shù):指定了要對客戶機(jī)連接執(zhí)行的操作:繼續(xù)、斷開連接或延遲接受請求。
SEC_PROTOCOL_ERROR_TRACE_ACTION參數(shù):指定了監(jiān)視操作:NONE、TRACE、LOG 或ALERT。
(3)防止強(qiáng)力攻擊
新的初始化參數(shù)SEC_MAX_FAILED_LOGIN_ATTEMPTS的默認(rèn)設(shè)置為10,表示在連接嘗試達(dá)到指定次數(shù)后會(huì)自動(dòng)斷開連接。即使未啟用口令概要文件,也會(huì)強(qiáng)制實(shí)施此參數(shù)。
此參數(shù)可以防止程序連接到數(shù)據(jù)庫,然后成百上千次地嘗試口令以通過驗(yàn)證。
SEC_PROTOCOL_ERROR_FURTHER_ACTION
SEC_PROTOCOL_ERROR_FURTHER_ACTION specifies the further execution of a server
process when receiving bad packets from a possibly malicious client.
Values:
■ CONTINUE
The server process continues execution. The database server may be subject to a
Denial of Service (DoS) if bad packets cont inue to be sent by a malicious client.
■ (DELAY,integer)
The client experiences a delay of integer seconds before the server process accepts
the next request from the same client co nnection. Malicious cl ients are prevented
from excessive consumption of server resources while legitimate clients experience
a degradation in performance but can continue to function.
■ (DROP, integer)
The server forcefully terminates the client connection after integer cumulative bad
packets. The server protects itself at the ex pense of the client (for example, a client
transaction may be lost). The client may reconnect and attempt the same
operation.
Property Description
Parameter type Integer
Default value 10
Modifiable No
Range of values 1 to unlimited
Basic No
Property Description
Parameter type String
Syntax SEC_PROTOCOL_ERROR_FURTHER_ACTION = { CONTINUE |
(DELAY,integer) | (DROP, integer) }
Default value CONTINUE
Modifiable ALTER SESSION , ALTER SYSTEM
Basic No
SEC_PROTOCOL_ERROR_TRACE_ACTION
1-154 Oracle Database Reference
SEC_PROTOCOL_ERROR_TRACE_ACTION
SEC_PROTOCOL_ERROR_TRACE_ACTION specifies the action th at the database should
take when bad packets are received from a possibly malicious client.
Values:
■ NONE
The database server ignores the bad packets and does not generate any trace files
or log messages.
■ TRACE
A detailed trace file is generated when bad packets are received, which can be
used to debug any problems in client/server communication.
■ LOG
A minimal log message is printed in the alert logfile and in the server trace file. A
minimal amount of disk space is used.
■ ALERT
An alert message is sent to a DBA or monitoring console.
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