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Request Permission to Bind to privileged Ports on Mac and Linux

Justin | Last updated: Nov 02, 2020 05:14PM UTC

Greetings, A common use case I have is to use burp to invisibly proxy desktop applications. In order to do so on the Mac OS, I need to either run burp as root from command line, or start another process to redirect to an unprivileged burp port. I would like to request that portswigger add the ability for burp to either request the ability to bind to privileged ports from the operating system, or have a built in tool that binds to this port instead of burp.

Hannah, PortSwigger Agent | Last updated: Nov 05, 2020 08:55AM UTC

Hi You will need to be running as a root user to bind to a privileged port. There are a couple of different methods that you can use for binding to privileged ports. These are discussed here: https://superuser.com/questions/710253/allow-non-root-process-to-bind-to-port-80-and-443 You could use port forwarding to redirect traffic. Alternatively, it looks like authbind, as mentioned on the forum, is available on Mac, so you could use that instead.

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