The Callback Address screen allows you to configure the address used to detect vulnerabilities that allow an attacker to call remote URLs.
In previous versions the ZAP API was used for this purpose, but from 2.6.0 onwards a separate endpoint is used so that target systems no longer need access to the API.
The local address that ZAP will listen on for incoming connections. The default value of ‘0.0.0.0’ means that ZAP will listen on all available local addresses.
The address that will be specified in the relevant attacks. This address must be accessible from the target system. You can use the Test URL to check that this is the case.
By default ZAP will use a different port each time it is run. If you need to use the same port (for example to allow access through firewalls) then uncheck this option.
If the Random Port option is unchecked then this is the port that ZAP will listen on. It must be different to the other ports ZAP uses, for example the port it uses for proxying connections.
This is the test URL that you can try to access from remote systems. All accesses to the Test URL will be recorded in the ZAP log file at INFO level. If you are using the ZAP UI then accesses will also be shown in the Output tab, as well as the Callbacks tab.
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