cvs commit: src/lib/libc/resolv res_comp.c
wes at opensail.org
Mon Feb 18 10:49:58 PST 2008
On Feb 18, 2008, at 6:38 AM, Guy Helmer wrote:
> Xin LI wrote:
>> -----BEGIN PGP SIGNED MESSAGE-----
>> Hash: SHA1
>> M. Warner Losh wrote:
>> I don't think it would be the end of world if we allow _ in host
>> All other (lame) OSes allows it, their resolver just accepts this
>> character and give the answer, actually, I would be very surprised
>> if it
>> can still cause any real world attack nowadays.
> Are we talking about hostnames specifically, or domain name
> components in general?
> I've been recently looking at DomainKeys, and underscores appear to
> be typically used in the domain components for domain keys TXT
> records (example below from http://www.elandsys.com/resources/sendmail/domainkeys.html)
> mail._domainkey.example.com. IN TXT "k=rsa; t=y;
Other systems, including mDNS and zeroconf, rely on underscores in
domain components as well. Underscores in domain names are a de jure
standard, in the hostname a de facto standard.
Where am I, and what am I doing in this handbasket?
Wes Peters wes at opensail.org
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