如果您的网站程序和数据库不在同一台服务器上，在连接数据库的时候，如果发生连接错误，一般是以下原因造成的: 1。 没有在数据库管理面板中设置远程连接IP造成的。 说明：为了提高操作系统的安全性，所有使用了星外安全包的用户，在导 入ipsec策略后，SQL2000
如果您的网站程序和数据库不在同一台服务器上，在连接数据库的时候，如果发生连接错误，一般是以下原因造成的:1。 没有在数据库管理面板中设置远程连接IP造成的。
说明：为了提高操作系统的安全性，所有使用了星外安全包的用户，在导
入ipsec策略后，SQL2000所使用的1433端口及MySQL使用的3306
端口就会自动被关闭。如果您需要在不同的服务器之间连接数据
库，您就需要在数据库管理面板中设置远程连接IP才能远程连接数
据库。
解决办法：您的数据库用户如果需要远程连接服务器的1433或3306端口，
您应该让这个用户自己登陆[星外虚拟主机管理平台]的用户
区，点数据库管理，点数据库面板中的设置远程IP，将这个用户
自己的远程连接IP填写进去，平台就会自动允许这个IP远程连
接服务器的1433或3306端口。
特别说明：如果你在数据据库面板中输入的远程ＩＰ不对，也会造成
无法连接的问题，如果你关了ＩＰ策略后就能正常连接
就是因为你输入的远程ＩＰ不对造成的。
对于双线服务器来说，对方的远程ＩＰ很可能和网卡中
看到的ＩＰ不一样，具体是什么只有测试才知道。测试
办法：在你的数据库服务器上做一个能显示ＩＰ的ＡＳＰ
网页，让远程连接的电脑访问这个ＡＳＰ网页，显示的
ＩＰ才是真正的远程连接ＩＰ。
2。 您自己在操作系统中启用了Windows自带的防火墙造成的。
说明：如果您使用了星外的安全包，Windows自带的防火墙是不需要启动
的，如果您不小心启动了它，就会造成1433及3306端口被完全关
闭，也就会造成远程无法连接SQL2000及MySQL了。
解决办法：在这台服务器上，找到网卡属性，找到防火墙的设置，点关闭
就可以解决了。
3。 您自己在操作系统中启用了网卡属性中的TCP/IP端口过滤造成的。
说明：如果您使用了星外的安全包，网卡属性中的TCP/IP端口过滤是不需
要启动，如果您不小心启动了它，就会造成1433及3306端口被关
闭，也就会造成远程无法连接SQL2000及MySQL了。
解决办法：在这台服务器上，找到网卡属性，找到TCP/IP端口过滤的设
置，点关闭就可以解决了。
4。 您自己在操作系统中安装了独立的防火墙(或杀毒)软件关了这些端口造
成的。
说明：如果您使用了星外的安全包，独立的防火墙软件，一般是不需要安
装的，如果您不小心安装了它，就会造成1433及3306端口被关闭，
也就会造成远程无法连接SQL2000及MySQL了。
解决办法：删除这些独立的防火墙软件。
5。 您的两台服务器所在的机房在路由器上作了限制造成的。
说明：有少量的机房为了防止蠕虫病毒，强行在路由器上限制了远程访问
1433及3306端口，就会造成远程无法连接SQL2000及MySQL了。
解决办法：联系机房服务器所有的机房解除限制。
6。 您的服务器安装了SQL2000，但是没有安装SQL2000的sp4补丁造成的。
说明：如果已排除了上述的1，2，3，4，5点的问题，您可以在数据库服
务器上，在dos中运行
netstat -an
再看看返回的结果中有没有1433端口存在。如果有1433，就表明是
前面的1，2，3，4，5点的问题造成的。如果返回的结果中查看不
到显示有1433端口，可能的原因是，你的SQL 2000没有安装sp4，
注意!!sp4解压后是要安装4的!!!!!!!!!!!!!!!!
操作系统自动关了1433端口，就会造成远程无法连接SQL2000了。
解决办法：下载SQL200的sp4安装好后重启服务器就会正常。如果装了
sp4，还是无法找到1433不行，就要重装SQL 2000及sp4了。
7。 您在远程连接时输入的数据库用户名密码不对造成。
说明：您可以用以下的方式检查服务器上的1433端口是否打开，在您的网
站服务器上，在在dos中运行
telnet 服务器IP 1433
如果能连接就表明端口是打开的。那么，就是您在远程连接数据库
时输入的数据库用户名密码不对造成了无法连接。
如果不能连接，请按上述的1，2，3，4，5，6点来进行检查。
解决办法：重新改正确密码，再重新连接。
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