一个SL服务器运行一个小型sl网格，该服务器没有连接到公共sl网格。
A SL server that runs a small SL grid, unconnected to the public SL grid.
很多中间层服务器并没有建立一个连接所需的用户的身份验证凭证。
Many middle-tier servers do not have the user's authentication credentials needed to establish a connection.
通常，对于您自己的服务器发起连接没有限制。
Typically, your own servers are allowed to initiate a connection without restriction.
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