layout: default title: IP Scanner parent: Application grand_parent: Documentation nav_order: 4 description: "Documentation of the IP Scanner" permalink: /Documentation/Application/IPScanner
IP Scanner
With the IP Scanner you can scan for active devices in subnets or IP ranges that are reachable via icmp or have a common tcp port open.
Possible inputs are:
| Input | Description |
|---|---|
10.0.0.1 | Single IP address (10.0.0.1) |
10.0.0.100 - 10.0.0.199 | All IP addresses in a given range (10.0.0.100, 10.0.0.101, ..., 10.0.0.199) |
10.0.0.0/23 | All IP addresses in a subnet (10.0.0.0, ..., 10.0.1.255) |
10.0.0.0/255.255.254.0 | All IP addresses in a subnet (10.0.0.0, ..., 10.0.1.255) |
10.0.[0-9,20].[1-2] | Multipe IP address like (10.0.0.1, 10.0.0.2, 10.0.1.1, ...,10.0.9.2, 10.0.20.1) |
example.com | Single IP address resolved from a host (10.0.0.1) |
example.com/24 | All IP addresses in a subnet resolved from a host (10.0.0.0, ..., 10.0.0.255) |
example.com/255.255.255.0 | All IP addresses in a subnet resolved from a host (10.0.0.0, ..., 10.0.0.255) |
{: .note }
Multiple inputs can be combined with a semicolon (;).
Example: 10.0.0.0/24; 10.0.[10-20]1
The button to the left of the Scan button determines the IP address and subnet mask of the network interface currently in use in order to scan the local subnet for active devices.
If you right-click on a selected result, you can forward the device information to other applications (e.g. Port Scanner, Remote Desktop, etc), create a new profile with this information or execute a custom command.
Profile
Inherit host from general
Inherit the host from the general settings.
Type: Boolean
Default: Disabled
{: .note } If you enable this option, the IP range is overwritten by the host from the general settings and the IP range is disabled.
IP range
IP range to scan for active devices.
Type: String
Default: Empty
Example: 10.0.0.0/24; 10.0.[10-20].1
Settings
Show unreachable IP addresses and ports
Show the scan result for all IP addresses and ports including the ones that are not active.
Type: Boolean
Default: Disabled
Attempts
Attempts how often an icmp request is retried for each IP address if the request has timed out.
Type: Integer [Min 1, Max 10]
Default: 2
Timeout (ms)
Timeout in milliseconds for each icmp request and after which the packet is considered lost.
Type: Integer [Min 100, Max 15000]
Default: 4000
Buffer
Size of the buffer for each icmp request in bytes.
Type: Integer [Min 1, Max 65535]
Default: 32
Resolve hostname
Resolve the hostname (PTR) for each IP address.
Type: Boolean
Default: Enabled
Show error message
Show a detailed error message if the DNS resolution fails for an IP address.
Type: Boolean
Default: Disabled
Scan ports
Scan each IP address for open tcp ports.
Type: Boolean
Default: Enabled
Ports
List of tcp ports to scan for each IP address.
Type: String
Default: 22; 53; 80; 139; 389; 636; 443; 445; 3389
{: .note }
Multiple ports and port ranges can be combined with a semicolon (e.g. 22; 80; 443). Only common and known ports should be scanned to check if a host is reachable. Use the Port Scanner for a detailed port scan.
Timeout (ms)
Timeout in milliseconds after which a port is considered closed / timed out.
Type: Integer [Min 100, Max 15000]
Default: 4000
Resolve MAC address and vendor
Resolve the MAC address and vendor for each IP address.
Type: Boolean
Default: Enabled
{: .note } Due to the fact that the MAC address is resolved via ARP, the device must be in the same subnet as the IP address.
Custom commands
Custom commands that can be executed with a right click on the selected result.
Type: List<NETworkManager.Utilities.CustomCommandInfo>
Default:
| Name | File path | Arguments |
|---|---|---|
| Edge | cmd.exe | /c start microsoft-edge:http://$$ipaddress$$/ |
| Edge (https) | cmd.exe | /c start microsoft-edge:https://$$ipaddress$$/ |
| Windows Explorer (c$) | explorer.exe | \\$$ipaddress$$\c$ |
In the arguments you can use the following placeholders:
| Placeholder | Description |
|---|---|
$$ipaddress$$ | IP address |
$$hostname$$ | Hostname |
Max. concurrent host threads
Maximal number of threads that are used to scan for active hosts (IP addresses).
Type: Integer [Min 1, Max 512]
Default: 256
{: .note }
Too many simultaneous requests may be blocked by a firewall. You can reduce the number of threads to avoid this, but this will increase the scan time.
Too many threads can also cause performance problems on the device.
{: .note } This setting only change the maximum number of concurrently executed threads per host scan. See also the General settings to configure the application wide thread pool.
Max. concurrent port threads
Maximal number of threads that are used to scan for open ports for each host (IP address).
Type: Integer [Min 1, Max 10]
Default: 5
{: .note }
Too many simultaneous requests may be blocked by a firewall. You can reduce the number of threads to avoid this, but this will increase the scan time.
Too many threads can also cause performance problems on the device.
{: .note } This setting only change the maximum number of concurrently executed threads per port scan. See also the General settings to configure the application wide thread pool.