리눅스 rdate: timeout

rdate: timeout for
rdate: Could not connect socket: Connection timed out

1 테스트[ | ]

1.1 CentOS[ | ]

실패

[root@zetawiki ~]# rdate time.windows.com
rdate: timeout for time.windows.com

[root@zetawiki ~]# rdate ntp.kornet.net
rdate: timeout for ntp.kornet.net

성공

[root@zetawiki ~]# rdate time.nist.gov
rdate: [time.nist.gov]	Fri Mar 25 21:16:13 2016

[root@zetawiki ~]# rdate time.bora.net
rdate: [time.bora.net]	Fri Mar 25 21:16:00 2016

1.2 우분투[ | ]

실패

root@zetawiki:~# rdate time.windows.com
rdate: Could not connect socket: Connection timed out

root@zetawiki:~# rdate ntp.kornet.net
rdate: Could not connect socket: Connection timed out

성공

root@zetawiki:~# rdate time.nist.gov
Fri Mar 25 21:11:48 KST 2016

root@zetawiki:~# rdate time.bora.net
Fri Mar 25 21:11:49 KST 2016

2 37포트 확인[ | ]

실패

root@zetawiki:~# nc -vz -w3 time.windows.com 37
nc: connect to time.windows.com port 37 (tcp) timed out: Operation now in progress
root@zetawiki:~# nc -vz -w3 ntp.kornet.net 37
nc: connect to ntp.kornet.net port 37 (tcp) timed out: Operation now in progress

성공

root@zetawiki:~# nc -vz -w3 time.nist.gov 37
Connection to time.nist.gov 37 port [tcp/time] succeeded!
root@zetawiki:~# nc -vz -w3 time.bora.net 37
Connection to time.bora.net 37 port [tcp/time] succeeded!

3 같이 보기[ | ]