When we do a OU or network scan, only some machines are being discovered, and others are not.
Here are some examples from logs. All the desktops here have the same firewall rules via gpo applied to them
The 2nd log entry is from a server
Any ideas or suggestions would be great!
Info 2017-08-17 13:23:06.0359 1900 10 Thread [10] obtain an IP address 10.217.120.29 by BDZT82S.
Info 2017-08-17 13:23:06.0359 1900 10 Thread [10] was scanning: 10.217.120.29
Info 2017-08-17 13:23:06.0359 1900 10 IP 10.217.120.29 was found, computer name was BDZT82S, domain/workgroup was DLAPF.
Info 2017-08-17 13:23:06.0359 1900 10 Thread [10] scan task exited.
Info 2017-08-17 13:23:06.2546 1900 35 There was a problem scanning 10.218.105.109:137 (J51V82S) (this might be normal): System.Net.Sockets.SocketException (0x80004005): A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond
at System.Net.Sockets.Socket.ReceiveFrom(Byte[] buffer, Int32 offset, Int32 size, SocketFlags socketFlags, EndPoint& remoteEP)
at System.Net.Sockets.Socket.ReceiveFrom(Byte[] buffer, EndPoint& remoteEP)
at SC.Server.WindowsService.ComputerScan.ScanIPAddress(String consoleIP, String consoleLoginName, String ip, String name)
Info 2017-08-17 13:23:06.2546 1900 35 IP 10.218.105.109 was not found.
Info 2017-08-17 13:33:13.8144 1900 18 Thread [18] obtain an IP address 10.217.150.26 by NZAUC1BH02.
Info 2017-08-17 13:33:13.8144 1900 18 Thread [18] was scanning: 10.217.150.26
Info 2017-08-17 13:33:13.8144 1900 18 IP 10.217.150.26 was found, computer name was NZAUC1BH02, domain/workgroup was DLAPF.
Info 2017-08-17 13:33:13.8144 1900 18 Create remotely install client: NZAUC1BH02 0 ms
Info 2017-08-17 13:33:13.8144 1900 18 Thread [18] scan task exited.
Info 2017-08-17 13:33:16.5175 1900 42 There was a problem scanning 10.218.150.16:137 (NZWEL1PRN01) (this might be normal): System.Net.Sockets.SocketException (0x80004005): A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond
at System.Net.Sockets.Socket.ReceiveFrom(Byte[] buffer, Int32 offset, Int32 size, SocketFlags socketFlags, EndPoint& remoteEP)
at System.Net.Sockets.Socket.ReceiveFrom(Byte[] buffer, EndPoint& remoteEP)
at SC.Server.WindowsService.ComputerScan.ScanIPAddress(String consoleIP, String consoleLoginName, String ip, String name)
Info 2017-08-17 13:33:16.5175 1900 42 IP 10.218.150.16 was not found.