The Meaning of MikroTik Log Messages on Linux Server

This is example of log messages from MikroTik. I am trying to understand the causes of these logs and the rule where the Mikrotik that produce it. I tried to group them in the same time sequence.

May 9 23:43:46 183.91.67.2 KPB Unknown(81) = 00-00-00-42-50-41-2D-41-47-2D-50-43
May 9 23:43:46 183.91.67.2 KPB Class-Id = "MSFT 5.0"
May 9 23:43:46 183.91.67.2 KPB Parameter-List = Subnet-Mask,Domain-Name,Router,Domain-Server,NETBIOS-Name-Server,Unknown(46),Unknown(47),Unknown(31),Static-Route,Classless-Route,Unknown(249),Vendor-Specific
May 9 23:43:46 KPB dhcp_bsdm sending ack with id 1548336385 to 255.255.255.255
May 9 23:43:46 183.91.67.2 KPB flags = broadcast
May 9 23:43:46 183.91.67.2 KPB ciaddr = 0.0.0.0
May 9 23:43:46 183.91.67.2 KPB yiaddr = 192.168.2.85
May 9 23:43:46 183.91.67.2 KPB siaddr = 192.168.2.1
May 9 23:43:46 183.91.67.2 KPB chaddr = 00:15:F2:82:D9:39
May 9 23:43:46 183.91.67.2 KPB Msg-Type = ack
May 9 23:43:46 183.91.67.2 KPB Server-Id = 192.168.2.1
May 9 23:43:46 183.91.67.2 KPB Address-Time = 31536000
May 9 23:43:46 183.91.67.2 KPB Subnet-Mask = 255.255.255.0
May 9 23:43:46 183.91.67.2 KPB Router = 192.168.2.1
May 9 23:43:46 183.91.67.2 KPB Domain-Server = 202.152.5.36,202.152.0.2

May 9 23:58:08 KPB dhcp_bu received inform with id 420795606 from 192.168.1.246
May 9 23:58:08 183.91.67.2 KPB Msg-Type = inform
May 9 23:58:08 183.91.67.2 KPB Client-Id = 01-00-50-8D-9F-48-F9
May 9 23:58:08 183.91.67.2 KPB Host-Name = "Windows7-PC"
May 9 23:58:08 183.91.67.2 KPB Class-Id = "MSFT 5.0"
May 9 23:58:08 183.91.67.2 KPB Parameter-List = Subnet-Mask,Domain-Name,Router,Domain-Server,NETBIOS-Name-Server,Unknown(46),Unknown(47),Unknown(31),Static-Route,Classless-Route,Unknown(249),Vendor-Specific,Unknown(252)
May 9 23:58:08 KPB dhcp_bu sending ack with id 420795606 to 255.255.255.255
May 9 23:58:08 183.91.67.2 KPB flags = broadcast
May 9 23:58:08 183.91.67.2 KPB ciaddr = 192.168.1.246
May 9 23:58:08 183.91.67.2 KPB siaddr = 192.168.1.129
May 9 23:58:08 183.91.67.2 KPB chaddr = 00:50:8D:9F:48:F9
May 9 23:58:08 183.91.67.2 KPB Msg-Type = ack
May 9 23:58:08 183.91.67.2 KPB Server-Id = 192.168.1.129
May 9 23:58:08 183.91.67.2 KPB Subnet-Mask = 255.255.255.128
May 9 23:58:08 183.91.67.2 KPB Router = 192.168.1.129
May 9 23:58:08 183.91.67.2 KPB Domain-Server = 202.152.5.36,202.152.0.2

May 10 00:14:15 183.91.67.2 KPB Subnet-Mask = 255.255.255.0
May 10 00:14:15 183.91.67.2 KPB Router = 192.168.2.1
May 10 00:14:15 183.91.67.2 KPB Domain-Server = 202.152.5.36,202.152.0.2

May 10 00:18:50 KPB dhcp_bsdm received request with id 2652037990 from 0.0.0.0
May 10 00:18:50 183.91.67.2 KPB flags = broadcast
May 10 00:18:50 183.91.67.2 KPB ciaddr = 0.0.0.0
May 10 00:18:50 183.91.67.2 KPB chaddr = 00:15:F2:82:D9:39
May 10 00:18:50 183.91.67.2 KPB Msg-Type = request
May 10 00:18:50 183.91.67.2 KPB Client-Id = 01-00-15-F2-82-D9-39
May 10 00:18:50 183.91.67.2 KPB Address-Request = 192.168.2.85
May 10 00:18:50 183.91.67.2 KPB Host-Name = "BPA-AG-PC"
May 10 00:18:50 183.91.67.2 KPB Unknown(81) = 00-00-00-42-50-41-2D-41-47-2D-50-43
May 10 00:18:50 183.91.67.2 KPB Class-Id = "MSFT 5.0"
May 10 00:18:50 183.91.67.2 KPB Parameter-List = Subnet-Mask,Domain-Name,Router,Domain-Server,NETBIOS-Name-Server,Unknown(46),Unknown(47),Unknown(31),Static-Route,Classless-Route,Unknown(249),Vendor-Specific
May 10 00:18:50 KPB dhcp_bsdm sending ack with id 2652037990 to 255.255.255.255
May 10 00:18:50 183.91.67.2 KPB flags = broadcast
May 10 00:18:50 183.91.67.2 KPB ciaddr = 0.0.0.0
May 10 00:18:50 183.91.67.2 KPB yiaddr = 192.168.2.85
May 10 00:18:50 183.91.67.2 KPB siaddr = 192.168.2.1
May 10 00:18:50 183.91.67.2 KPB chaddr = 00:15:F2:82:D9:39
May 10 00:18:50 183.91.67.2 KPB Msg-Type = ack
May 10 00:18:50 183.91.67.2 KPB Server-Id = 192.168.2.1
May 10 00:18:50 183.91.67.2 KPB Address-Time = 31536000
May 10 00:18:50 183.91.67.2 KPB Subnet-Mask = 255.255.255.0
May 10 00:18:50 183.91.67.2 KPB Router = 192.168.2.1
May 10 00:18:50 183.91.67.2 KPB Domain-Server = 202.152.5.36,202.152.0.2

May 10 00:31:37 183.91.67.2 KPB Subnet-Mask = 255.255.255.0
May 10 00:31:37 183.91.67.2 KPB Router = 192.168.2.1
May 10 00:31:37 183.91.67.2 KPB Domain-Server = 202.152.5.36,202.152.0.2

May 10 00:31:48 KPB dhcp_bsdm received request with id 3594588014 from 0.0.0.0
May 10 00:31:48 183.91.67.2 KPB flags = broadcast
May 10 00:31:48 183.91.67.2 KPB ciaddr = 0.0.0.0
May 10 00:31:48 183.91.67.2 KPB chaddr = 00:15:F2:82:D9:39
May 10 00:31:48 183.91.67.2 KPB Msg-Type = request
May 10 00:31:48 183.91.67.2 KPB Client-Id = 01-00-15-F2-82-D9-39
May 10 00:31:48 183.91.67.2 KPB Address-Request = 192.168.2.85
May 10 00:31:48 183.91.67.2 KPB Host-Name = "BPA-AG-PC"
May 10 00:31:48 183.91.67.2 KPB Unknown(81) = 00-00-00-42-50-41-2D-41-47-2D-50-43
May 10 00:31:48 183.91.67.2 KPB Class-Id = "MSFT 5.0"
May 10 00:31:48 183.91.67.2 KPB Parameter-List = Subnet-Mask,Domain-Name,Router,Domain-Server,NETBIOS-Name-Server,Unknown(46),Unknown(47),Unknown(31),Static-Route,Classless-Route,Unknown(249),Vendor-Specific
May 10 00:31:48 KPB dhcp_bsdm sending ack with id 3594588014 to 255.255.255.255
May 10 00:31:48 183.91.67.2 KPB flags = broadcast
May 10 00:31:48 183.91.67.2 KPB ciaddr = 0.0.0.0
May 10 00:31:48 183.91.67.2 KPB yiaddr = 192.168.2.85
May 10 00:31:48 183.91.67.2 KPB siaddr = 192.168.2.1
May 10 00:31:48 183.91.67.2 KPB chaddr = 00:15:F2:82:D9:39
May 10 00:31:48 183.91.67.2 KPB Msg-Type = ack
May 10 00:31:48 183.91.67.2 KPB Server-Id = 192.168.2.1
May 10 00:31:48 183.91.67.2 KPB Address-Time = 31536000
May 10 00:31:48 183.91.67.2 KPB Subnet-Mask = 255.255.255.0
May 10 00:31:48 183.91.67.2 KPB Router = 192.168.2.1
May 10 00:31:48 183.91.67.2 KPB Domain-Server = 202.152.5.36,202.152.0.2

May 10 01:24:12 183.91.67.2 KPB Server-Id = 192.168.1.129
May 10 01:24:12 183.91.67.2 KPB Subnet-Mask = 255.255.255.128
May 10 01:24:12 183.91.67.2 KPB Router = 192.168.1.129
May 10 01:24:12 183.91.67.2 KPB Domain-Server = 202.152.5.36,202.152.0.2

May 10 02:11:24 183.91.67.2 KPB Subnet-Mask = 255.255.255.0
May 10 02:11:24 183.91.67.2 KPB Router = 192.168.2.1
May 10 02:11:24 183.91.67.2 KPB Domain-Server = 202.152.5.36,202.152.0.2

May 10 02:50:02 SRP HotSpot_Gd71: new host detected 00:14:D1:F1:16:8B/192.168.1.19 by UDP :1026 -> 202.169.224.16:123
May 10 02:55:02 SRP HotSpot_Gd71: dynamic host 172.16.1.114 removed: idle timeout

May 10 03:00:31 183.91.67.2 KPB Subnet-Mask = 255.255.255.128
May 10 03:00:31 183.91.67.2 KPB Router = 192.168.1.129
May 10 03:00:31 183.91.67.2 KPB Domain-Server = 202.152.5.36,202.152.0.2

May 10 03:21:38 183.91.67.2 KPB Address-Time = 31536000
May 10 03:21:38 183.91.67.2 KPB Subnet-Mask = 255.255.255.0
May 10 03:21:38 183.91.67.2 KPB Router = 192.168.2.1
May 10 03:21:38 183.91.67.2 KPB Domain-Server = 202.152.5.36,202.152.0.2

May 10 03:49:08 KPB user admin logged in from 110.137.227.147 via winbox
May 10 03:51:12 KPB log rule changed by admin
May 10 03:51:18 KPB log rule changed by admin
May 10 03:51:23 KPB log rule changed by admin

From http://whois.domaintools.com/, I find :
202.152.5.36 = ns.idola.net.id
202.152.0.2 = rajawali.idola.net.id

For last 100 lines :
#tail -100 /var/log/mikrotik.log

For real time :
#tail -f /var/log/mikrotik.log

Tested : event, info, system and warning
I tried to disable log rule or under testing : critical, dhcp, error
Enable log rule : hotspot.