regex101: matches any MAC ID in router log files

Regular Expression

([0-9A-F]{2}:){5}[0-9A-F]{2}

New

[DHCP IP: (192.168.1.17)] to MAC address 00:50:8D:91:40:A3, Monday, Aug 10,2020 21:06:09
[DHCP IP: (192.168.1.11)] to MAC address 00:FA:21:46:F0:70, Monday, Aug 10,2020 19:41:28
[DHCP IP: (192.168.1.14)] to MAC address 8C:79:67:C1:C4:F7, Monday, Aug 10,2020 19:41:12
[DHCP IP: (192.168.1.7)] to MAC address 00:1C:C0:F0:8A:94, Monday, Aug 10,2020 16:51:41
[DHCP IP: (192.168.1.17)] to MAC address 00:50:8D:91:40:A3, Monday, Aug 10,2020 15:53:03
[DHCP IP: (192.168.1.12)] to MAC address 0C:62:A6:E4:60:A6, Monday, Aug 10,2020 15:48:05
[Dynamic DNS] host name 520techsec.hopto.org registration successful, Monday, Aug 10,2020 14:29:55
[Dynamic DNS] host name 520techsec.hopto.org registration failure, Monday, Aug 10,2020 14:29:24
[Dynamic DNS] host name 520techsec.hopto.org registration failure, Monday, Aug 10,2020 14:28:53
[Dynamic DNS] host name 520techsec.hopto.org registration failure, Monday, Aug 10,2020 14:28:22
[DHCP IP: (192.168.1.10)] to MAC address 6C:C2:17:1E:B4:B9, Monday, Aug 10,2020 09:51:03
[DHCP IP: (192.168.1.17)] to MAC address 00:50:8D:91:40:A3, Monday, Aug 10,2020 09:04:50
[DHCP IP: (192.168.1.11)] to MAC address 00:FA:21:46:F0:70, Monday, Aug 10,2020 08:10:16
[DHCP IP: (192.168.1.14)] to MAC address 8C:79:67:C1:C4:F7, Monday, Aug 10,2020 08:10:01
[DHCP IP: (192.168.1.13)] to MAC address 00:16:44:DF:C7:92, Monday, Aug 10,2020 07:11:22
[DHCP IP: (192.168.1.13)] to MAC address 00:16:44:DF:C7:92, Monday, Aug 10,2020 07:04:23
[DHCP IP: (192.168.1.7)] to MAC address 00:1C:C0:F0:8A:94, Monday, Aug 10,2020 04:51:42
[DHCP IP: (192.168.1.17)] to MAC address 00:50:8D:91:40:A3, Monday, Aug 10,2020 03:52:41
[DHCP IP: (192.168.1.12)] to MAC address 0C:62:A6:E4:60:A6, Monday, Aug 10,2020 03:48:20
[DHCP IP: (192.168.1.10)] to MAC address 6C:C2:17:1E:B4:B9, Sunday, Aug 09,2020 21:15:05
[DHCP IP: (192.168.1.17)] to MAC address 00:50:8D:91:40:A3, Sunday, Aug 09,2020 21:06:42
[DHCP IP: (192.168.1.8)] to MAC address 9C:B6:D0:73:52:AB, Sunday, Aug 09,2020 20:53:45
[DHCP IP: (192.168.1.11)] to MAC address 00:FA:21:46:F0:70, Sunday, Aug 09,2020 20:39:03
[DHCP IP: (192.168.1.14)] to MAC address 8C:79:67:C1:C4:F7, Sunday, Aug 09,2020 20:38:48
[DHCP IP: (192.168.1.8)] to MAC address 9C:B6:D0:73:52:AB, Sunday, Aug 09,2020 20:33:15
[DHCP IP: (192.168.1.7)] to MAC address 00:1C:C0:F0:8A:94, Sunday, Aug 09,2020 16:51:41
[DHCP IP: (192.168.1.17)] to MAC address 00:50:8D:91:40:A3, Sunday, Aug 09,2020 15:53:06
[DHCP IP: (192.168.1.12)] to MAC address 0C:62:A6:E4:60:A6, Sunday, Aug 09,2020 15:48:33
[Dynamic DNS] host name 520techsec.hopto.org registration successful, Sunday, Aug 09,2020 14:28:12
[Dynamic DNS] host name 520techsec.hopto.org registration failure, Sunday, Aug 09,2020 14:27:41
[Dynamic DNS] host name 520techsec.hopto.org registration failure, Sunday, Aug 09,2020 14:27:10
[Dynamic DNS] host name 520techsec.hopto.org registration failure, Sunday, Aug 09,2020 14:26:38
[DHCP IP: (192.168.1.11)] to MAC address 00:FA:21:46:F0:70, Sunday, Aug 09,2020 09:07:51
[DHCP IP: (192.168.1.14)] to MAC address 8C:79:67:C1:C4:F7, Sunday, Aug 09,2020 09:07:37
[DHCP IP: (192.168.1.17)] to MAC address 00:50:8D:91:40:A3, Sunday, Aug 09,2020 09:05:37

Regular Expressions 101

Regular Expression

Substitution