Blind scan
Start
a
fully automatic scan
of all possible local IP ranges for broadcast addresses.
Targetted scan
Local IP address:
Start
an upwards scan for the
local network
broadcast address associated with the given IP address.
Start
a scan for an
active device
at the given address.
Scan options
Scan network
When a broadcast address is detected, scan the associated local network for active devices.
Scan ports
When an active devices is detected, scan its ports.
Request options
Requests will be made using:
XMLHTTPRequest
Image.src
Browsers prevent websites from making requests to certain ports. This blacklist appears to differ between
XMLHttpRequests
and
Image.src
(e.g. RDP port 3389 can only be detected with
Image.src
). The accuracy/speed of these method can also differ in some browsers (e.g.
Image.src
is very slow/inaccurate in Chrome).
Maximum number of
simultaneous requests
:
Bigger values allow for faster scanning, but too many requests can make the results inaccurate (i.e. active devices and open ports may not be detected). Smaller values result in slower scans but provide more accurate results. Here's the maximum values that provide accurate results for me:
Firefox:
XMLHttpRequest
= 200,
Image.src
= 120 Chrome:
XMLHttpRequest
= 50,
Image.src
= 10
Preload images:
