2018.09.11 / 18:18
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1.ping test¸¦ ÇÑ´Ù.
[svr:usr] ping 172.0.0.1
ÀÀ´ä¾øÀ¸¸é(pingÀÌ µÇÁö ¾ÊÀ¸¸é) firewall¿¡ µî·ÏÀÌ µÇÁö ¾ÊÀº °ÍÀÌ´Ù.
Á¤»óÀû °á°ú 172.0.0.1 is alive
2.1.telnet ip port ·Î È®ÀÎÇÑ´Ù.
[svr:usr] telnet 172.0.0.1 9999
Trying 172.0.0.1...
°è¼Ó ´ë±â ÁßÀÌ¸é ¹æȺ® ¿ÀÇÂÀÌ ¾ÈµÈ °ÍÀÌ´Ù.
2.2
[svr:usr] telnet 172.0.0.1 9999
Trying 172.0.0.1...
telnet: Unable to connect to remote host: Connection refused
¹Ù·Î ¿¬°á°ÅºÎ°¡ ¹ß»ýÇÏ¸é ¹æȺ® ¿ÀÇÂÀº µÇ¾úÀ¸³ª ÇÁ·Î¼¼½º°¡ ¾È ¶°ÀÖ´Â °ÍÀÌ´Ù.
(Æ÷Æ®¸¦ ¿°í ´ë±âÇÏ°í ÀÖÁö ¾ÊÀº »óÅÂ)
2.3
[svr:usr] telnet 172.0.0.1 9999
Trying 172.0.0.1...
Connected to 172.0.0.1
Escape character is '^]'.
¹æȺ® ¿ÀÇÂÀÌ Á¤»óÀûÀ¸·Î µÇ¾ú°í ÇÁ·Î¼¼½º°¡ ¿Ã¶ó°¡ ÀÖ´Â °ÍÀÌ´Ù.
(Æ÷Æ®¸¦ ¿°í ´ë±âÇÏ°í ÀÖ´Â »óÅÂ)
=> ÀÌ»óÅ°¡ µÇ¾ß Åë½ÅÅ×½ºÆ®¸¦ ÇÒ ¼ö ÀÖ´Ù
3. ¶ó¿ìÆà Å×À̺í È®ÀÎÇϱâ
[svr:usr] netstat -rn | grep 172.0.0.1
172.0.0.1 172.0.0.1 UG 1 186064
¿©±â¿¡ °ªÀÌ ÀÖÀ¸¸é ¿Ã¹Ù·Î ¼³Á¤µÈ °ÍÀÓ.