Re: weaknesses in dns label encoding

From: Walter Misar (misarat_private-DARMSTADT.DE)
Date: Fri Jun 04 1999 - 13:33:47 PDT

Next message: Georgi Guninski: "Netscape Communicator code injection in JavaScript console using"

Previous message: Aleph One: "Administrivia"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

Kragen Sitaker <kragenat_private> wrote:
> Are there other RFCs that describe allowed syntax for domain names?

Yes, probably most important 1123 (host requirements):

|>    The syntax of a legal Internet host name was specified in RFC-952
|>    [DNS:4].  One aspect of host name syntax is hereby changed: the
|>    restriction on the first character is relaxed to allow either a
|>    letter or a digit.  Host software MUST support this more liberal
|>    syntax.

Rfc 952 specifies:

|>      <hname> ::= <name>*["."<name>]
|>      <name>  ::= <let>[*[<let-or-digit-or-hyphen>]<let-or-digit>]

All digit names are allowed, underscore is not, two letter names are ok.

	Walter

Next message: Georgi Guninski: "Netscape Communicator code injection in JavaScript console using"
Previous message: Aleph One: "Administrivia"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

This archive was generated by hypermail 2b30 : Fri Apr 13 2001 - 14:48:15 PDT