oracle如何限定特定IP访问数据库

可以利用登录触发器、cmgw或者是在$OREACLE_HOME/network/admin下新增一个protocol.ora文件（有些os可能是. protocol.ora），9i可以直接修改sqlnet.ora：

　　增加如下内容：

　　tcp.validnode_checking=yes

　　#允许访问的ip

　　tcp.inited_nodes=(ip1,ip2,……)

　　#不允许访问的ip

tcp.excluded_nodes=(ip1,ip2,……)

利用触发器限定IP：

create table logcontrol

(IPDET VARCHAR2(15)

)

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/

create table limitip

(

 IPDET VARCHAR2(15),

 NOTE  VARCHAR2(50)

)

/

create table yclogin

(

IPDET VARCHAR2(15),

attempdate date default sysdate

)

/

insert into logcontrol values('130.76.1.135');

insert into limitip values('130.76.1.135','接口数据库');

/

CREATE OR REPLACE TRIGGER log_control                                            

AFTER logon ON DATABASE                                                          

declare                                                                          

  oname number(2);                                                               

  pragma autonomous_transaction;                                                 

begin                                                                            

if SYS_CONTEXT('USERENV','IP_ADDRESS') is not null                               

then                                                                              

select count(*) into oname from logcontrol                                       

where trim(IPDET)=SYS_CONTEXT('USERENV','IP_ADDRESS');                                 

  if oname<1 then                                                                 

  insert into yclogin values(SYS_CONTEXT('USERENV','IP_ADDRESS'));               

  commit;                                                                        

   Raise_application_error(-20999, 'ip访问限定，有需要请及时向系统管理员书面申请!!!');

   EXECUTE IMMEDIATE 'DISCONNECT';                                               

  end if;                                                                        

end if;                                                                           

end;