In Acunetix v11, the user interface is web based, and by default the web server hosting the web application is running on port 3443.
Therefore, if you are logged into the machine running Acunetix, you can browse to https://localhost:3443 to access Acunetix.
If you need to access Acunetix from a remote machine, you will need to know the IP address / hostname of the machine running Acunetix. In this case, you can access Acunetix by browsing to https://<IP or Hostname>:3443>
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