On Fri, 15 Jun 2007, Haejoong Lee wrote:

> I get an error message like the following if the host name begins with a
> hyphen or underscore.
>
> curl: (6) Couldn't resolve host ...

What curl version on what platform using what resolver?

> I looked at RFC 3936 and it allows such host names.
>
> host = IP-literal / IPv4address / reg-name
> reg-name = *( unreserved / pct-encoded / sub-delims )
> unreserved = ALPHA / DIGIT / "-" / "." / "_" / "~"
>
> Does anyone know what the problem is?

I can't see anything in (lib)curl that limits the name like this. In fact
libcurl allows far more letters than that...

I just tested with several curl versions, but then I don't have any host names
starting with these letters.

For host names that start with a dash, you might need to do it like:
  "curl -- -host"

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