Bind port 80 permission denied

[codycrypto]

Trying to complete an ACME request through step-cli

Receiving this error - "ListenAndServe(): listen tcp :80: bind: permission denied"

Tried running with sudo and this is what is returned "flag '--ca-url' is required unless the '--token' flag is provided"

I have a private local CA configured with step-ca.

[maraino]

Hi @codycrypto, the error happens because step/step-cli does not have permission to listen on port 80, required by the http-01 challenge.

There are different solutions for that. If you're in a Linux or a macOS, you can run it with sudo. Alternatively, on a Linux, you can also add capabilities to the binary, a command like:

sudo setcap CAP_NET_BIND_SERVICE=+eip path/to/step

On windows, I don't really know, running that as administrator?

The problem can also be that there's another program running on port 80.

[codycrypto]

Thank you! I think I found that same command digging around stack overflow at the same time you replied....that solved the issue. Thanks again.