YAMAHAネットワークルーターへのアクセス履歴をログから分析する方法。
logコマンドとgrepコマンドを組み合わせる。
RTX1210> show log reverse | grep TELNET
Searching ...
2025/12/26 16:01:12: Login succeeded for TELNET: 192.168.xxx.xxx
2025/12/26 16:00:31: Logout from TELNET: 192.168.xxx.xxx
2025/12/26 15:59:47: Login failed for TELNET: 192.168.xxx.xxx
2025/12/26 15:35:18: 'administrator' failed for TELNET: 192.168.xxx.xxx
RTX1210> show log reverse | grep 'Login access from TELNET'
Searching ...
2025/12/26 15:31:54: Login access from TELNET was restricted. : 192.168.xxx.xxx
2025/12/26 15:22:25: Login access from TELNET was restricted. : 192.168.xxx.xxx
2025/12/26 15:09:51: Login access from TELNET was restricted. : 192.168.xxx.xxx
2025/12/26 15:08:06: Login access from TELNET was restricted. : 192.168.xxx.xxx
2025/12/26 15:06:52: Login access from TELNET was restricted. : 192.168.xxx.xxx
2025/12/26 14:30:59: Login access from TELNET was restricted. : 192.168.xxx.xxx
2025/12/26 14:25:30: Login access from TELNET was restricted. : 192.168.xxx.xxx
2025/12/26 14:24:21: Login access from TELNET was restricted. : 192.168.xxx.xxx