红帽全球峰会2.7.2. 测试端口访问
使用 nc 检查 LDAPS 端口(636)是否可以远程访问。在本例中，探测针对服务器 idm.lab.local 执行。按 ctrl-c 退出提示符。
nc -v idm.lab.local 636 Ncat: Version 6.40 ( http://nmap.org/ncat ) Ncat: Connected to 192.168.200.10:636. ^C
# nc -v idm.lab.local 636
Ncat: Version 6.40 ( http://nmap.org/ncat )
Ncat: Connected to 192.168.200.10:636.
^C无法建立连接可能会代表防火墙配置问题。
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