MSSQL2005 报 Login failed for user 'sa'. 错误
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最近一台MSSQL 2005 系统每隔两分钟就报一次 Login failed for user 'sa'. [CLIENT:<local host>]
以为是机器被攻击或中了木马，反复检查也没发现可疑信息！
最好通过 跟踪 发现原来是 Linked Servers 作怪，原来是之间建立的 Linked servers 使用 SA 连接，之后因为修改过 sa的密码而没有更新linked servers，删除或更新linked servers 解决。
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