瑞士军刀-NC-Java专区论坛-技术-SpringForAll社区

瑞士军刀-NC

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nc -v verbose, Have nc give more verbose output

-z Specifies that nc should just scan for listening daemons, without

sending any data to them. It is an error to use this option in

conjunction with the -l option

-n Do not do any DNS or service lookups on any specified addresses,

hostnames or ports.

[test@test ~]$ nc -vz 192.20.20.168 8899

Connection to 192.20.20.168 8899 port [tcp/ospf-lite] succeeded!

[test@test ~]$ nc -vz 192.20.20.168 8080

Connection to 192.20.20.168 8080 port [tcp/webcache] succeeded!

[fbs2@fbs ~]$ nc -vz 192.20.20.114 8899

nc: connect to 192.20.20.114 port 8899 (tcp) failed: Connection timed out

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