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PLSQL通过Oracle 11g客户端连接Oracle 12c服务器错误 ORA-28040
环境描述:
oracle服务器端版本:oracle 12.2.0.1.0
oracle客户端版本:oracle 11.2.0.1.0
PLSQL是11.4
因为PLSQL连接数据库也是要通过Oracle客户端,那么使用11g客户端访问oracle 12c应该也会得到如下错误:
C:\Users\Administrator>sqlplus sys/abcd@shardcat as sysdba SQL*Plus: Release 11.2.0.1.0 Production on Sat Dec 20 22:22:07 2014 Copyright (c) 1982, 2010, Oracle. All rights reserved. ERROR: ORA-28040: No matching authentication protocol
查看关于错误的详细描述:
[oracle@shard1 admin]$ oerr ora 28040 28040, 0000, "No matching authentication protocol" // *Cause: There was no acceptable authentication protocol for // either client or server. // *Action: The administrator should set the values of the // SQLNET.ALLOWED_LOGON_VERSION_SERVER and // SQLNET.ALLOWED_LOGON_VERSION_CLIENT parameters, on both the // client and on the server, to values that match the minimum // version software supported in the system. // This error is also raised when the client is authenticating to // a user account which was created without a verifier suitable for // the client software version. In this situation, that account's // password must be reset, in order for the required verifier to // be generated and allow authentication to proceed successfully.
在服务器端查看表:dba_users,PASSWORD_VERSIONS 列是:11G 12C
SQL> select username, account_status,password_versions from dba_users where account_status='OPEN'; USERNAME ACCOUNT_STATUS PASSWORD_VERSIONS ------------------------------ ---------------------------------------------------------------- ---------------------------------- SYS OPEN 11G 12C SYSTEM OPEN 11G 12C GSMCATUSER OPEN 11G 12C JY OPEN 11G 12C MYGDSADMIN OPEN 11G 12C APP_SCHEMA OPEN 11G 12C 6 rows selected.
服务器端:修改 sqlnet.ora 配置:(配置修改后,不需要重启oracle服务器)我这里是新创建的sqlnet.ora,因为原来没有创建
[oracle@shard1 admin]$ ls -lrt 总用量 12 -rw-r--r--. 1 oracle oinstall 1441 8月 28 2015 shrept.lst drwxr-xr-x. 2 oracle oinstall 61 10月 12 2017 samples -rw-r-----. 1 oracle oinstall 960 1月 18 2018 tnsnames.ora -rw-r--r-- 1 oracle oinstall 504 2月 17 12:58 listener.ora [oracle@shard1 admin]$ vi sqlnet.ora SQLNET.ALLOWED_LOGON_VERSION_SERVER=11 SQLNET.ALLOWED_LOGON_VERSION_CLIENT=11
客户端:再次尝试连接,提示用户名密码错误:
C:\Users\Administrator>sqlplus sys/abcd@shardcat as sysdba SQL*Plus: Release 11.2.0.1.0 Production on Sat Dec 20 22:16:06 2014 Copyright (c) 1982, 2010, Oracle. All rights reserved. ERROR: ORA-01017: invalid username/password; logon denied
修改服务器端 sqlnet.ora 后,需要重新登录sqlplus,再修改用户密码,否则修改用户密码后,标记的密码版本仍然为11G 12C;重新登录sqlplus,修改scott用户密码,并查看 PASSWORD_VERSIONS,多了一个 10G
[oracle@shard1 ~]$ sqlplus sys/abcd@shardcat as sysdba SQL*Plus: Release 12.2.0.1.0 Production on Mon Feb 17 13:07:28 2020 Copyright (c) 1982, 2016, Oracle. All rights reserved. Connected to: Oracle Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit Production SQL> alter user sys identified by "abcd"; User altered. SQL> select username, account_status,password_versions from dba_users where account_status='OPEN'; USERNAME ACCOUNT_STATUS PASSWORD_VERSIONS ------------------------------ ---------------------------------------------------------------- ---------------------------------- SYS OPEN 10G 11G 12C SYSTEM OPEN 11G 12C GSMCATUSER OPEN 11G 12C JY OPEN 11G 12C MYGDSADMIN OPEN 11G 12C APP_SCHEMA OPEN 11G 12C 6 rows selected.
客户端:再次尝试登录oracle 12c,成功:
C:\Users\Administrator>sqlplus sys/abcd@shardcat as sysdba SQL*Plus: Release 11.2.0.1.0 Production on Sat Dec 20 22:22:39 2014 Copyright (c) 1982, 2010, Oracle. All rights reserved. Connected to: Oracle Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit Production SQL>
总结:oracle11g 客户端连接 oracle 12c服务器,需要在服务器端配置 sqlnet.ora,并重新修改用户密码。
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