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host name with hyphen or underscore at the beginning

From: Haejoong Lee <haejoong_at_ldc.upenn.edu>
Date: Fri, 15 Jun 2007 05:33:59 -0400

Hello,

I get an error message like the following if the host name begins with a
hyphen or underscore.

    curl: (6) Couldn't resolve host ...

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?

Thanks in advance!

-Haejoong
Received on 2007-06-15