Acunetix Online is an online solution, which means that all the scans are done from our servers. You do not need to download any software in order to scan your web sites / perimeter servers.
The only exception would be when you need to scan a restricted area on a web site. In this case, you need to use the Acunetix Login Sequence Recorder, which can be downloaded from https://www.acunetix.com/download/onlinescanner/acunetix_lsr_setup.exe
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