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DNS Host Name Substitutes "-" for Invalid CharactersArticle ID: 149044 - View products that this article applies to. This article was previously published under Q149044 SYMPTOMS
A hypen (minus sign) is substituted whenever you use a percent sign, pound
sign, or underscore in a computer name during an initial installation of
Windows NT. For example, %MYNAME, MYNAME#1, and MYNAME_1 become,
respectively, -MYNAME, MYNAME-1, and MYNAME-1.
It is not possible to add a percent sign, pound sign, or underscore into the DNS Host Name even though the Server Installation Guide does not list them as invalid characters. If you try to insert an invalid character, the following error is displayed:
The parameter is incorrect.
Another symptom occurs when you attempt to connect to a newly created Web server with an invalid character in the computer name. You are unable to connect to HTTP://SERVER#1, but you can connect to HTTP://SERVER-1. CAUSE
The cause of this error message is given in RFC 952, which states:
A "name" (Net, Host, Gateway, or Domain name) is a text string up
to 24 characters drawn from the alphabet (A-Z), digits (0-9), minus
sign (-), and period (.). Note that periods are only allowed when
they serve to delimit components of "domain style names". (See
RFC-921, "Domain Name System Implementation Schedule", for
background). No blank or space characters are permitted as part of a
name. No distinction is made between upper and lower case. The first
character must be an alpha character. The last character must not be
a minus sign or period. A host which serves as a GATEWAY should have
"-GATEWAY" or "-GW" as part of its name. Hosts which do not serve as
Internet gateways should not use "-GATEWAY" and "-GW" as part of
their names. A host which is a TAC should have "-TAC" as the last
part of its host name, if it is a DoD host. Single character names
or nicknames are not allowed.
DOD INTERNET HOST TABLE SPECIFICATION: -------------------------------------- This RFC is the official specification of the format of the Internet Host Table. This edition of the specification includes minor revisions to RFC-810 which brings it up to date. Distribution of this memo is unlimited. By design, the Microsoft Windows NT DNS Hosts Configuration utility replaces all invalid characters in the DNS host name found in the NetBIOS computer name with a hyphen. If you want your NetBIOS and DNS host names to match, you must use the DNS naming standard outlined in RFC 952 when creating your NetBIOS computer name. WORKAROUND
In the DNS Configuration dialog box for the TCP/IP Protocol in Control
Panel Network, change the host name to a valid string of characters.
For further information on RFC Documents, reference: http://www.rfc-editor.org/
(http://www.rfc-editor.org/)
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