Transparent Proxy doesn't work with Safari

Question

Created Dec ’19

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I've been working with the Transparent Proxy portion of the Network Extensions / System Extensions in Catalina. When I try to proxy port 80, and go to a http site, Safari gives me an error "The operation could not be completed. Operation not permitted (NSPOSIXErrorDomain:1)". Other browsers (Firefox, Brave) seem to work fine. Data flows to and from both browsers and I see the metadata about those connections. Safari on the other hand, stops the communications altogether. When I turn the Proxy off, Safari works as usual. As you might imagine, https works fine, but I am not running a transparent proxy for port 443, just 80.

Thanks

Chris Parker

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Answer 1

DTS Engineer OP

Apple

Dec ’19

When I try to proxy port 80, and go to a http site, Safari gives me an error … Other browsers (Firefox, Brave) seem to work fine.

Well, that’s weird. I tried this here with a test transparent proxy here in my office and I’m seeing the same thing. Please file a bug about this, and post your bug number, just for the record.

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—
Quinn “The Eskimo!”
Apple Developer Relations, Developer Technical Support, Core OS/Hardware

let myEmail = "eskimo" + "1" + "@apple.com"

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Answer 2

bb1216 OP

Dec ’19

Thanks for confirming it, Quinn. The bug number is FB7492627.

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