为使用PAM配置客户机和服务器之间的连接。
Configuring connectivity between client and server to use PAM.
这样，客户机和服务器之间的连接就建立起来了。
After this, the connection between client and server is established.
dest_socket是负载平衡器与被平衡服务器之间的连接。
Dest_socket is the connection between the load balancer and the balanced servers.
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