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22 Oct 2017
Rep's Graves and Sinema recently introduced H.R. 4036, the catchily named
Active Cyber Defense Certainty Act or ACDC act which creates some exceptions to criminal parts of computer crime laws.
Lots of reports have decried "hack back" but if you read the bill, it's surprisingly
well targeted.
See more ...
Stable link is https://jl.ly/Internet/hackback.html
26 Sep 2017
Here's some unexpected advice about what to do about the recent
giant Equifax breach: nothing.
See more ...
Stable link is https://jl.ly/Money/equinot.html
26 Aug 2017
A recent article
in the New York Times Dealbook column reported on phone number hijacking, in which a
bad guy fraudulently takes over someone's mobile phone number and used it to
reset credentials and drain the victim's account.
It happens a lot, even to
the chief technologist of the FTC.
This reminds us that security is hard, and understanding two factor authentication is
harder than it seems.
The usual definition of two-factor is to pick two different items from
a list of security types:
See more ...
Stable link is https://jl.ly/Security/2fphone.html
10 Aug 2017
Yesterday's article introduced my
DNS extension language, intended to make it easier to add new DNS
record types to DNS software.
It described a new perl module Net::DNS::Extlang that uses the extension language
to automatically create perl code to handle new RRTYPEs.
Today we look at my second project, intended to let people create DNS records and zone
files with new RRTYPEs.
See more ...
Stable link is https://jl.ly/Internet/extlang2.html
08 Aug 2017
The Domain Name System has always been intended to be extensible.
The original spec in the 1980s had about a dozen resource record types (RRTYPEs),
and since then people have invented many more so now there are about 65 different RRTYPEs.
But if you look at most DNS zones, you'll only see a handful of types, NS, A, AAAA, MX, TXT,
and maybe SRV.
Why?
A lot of the other types are arcane or obsolete, but there are plenty that are useful.
Moreover, new designs like DKIM, DMARC, and notorously SPF have reused TXT records
rather than defining new types of their own. Why? It's the provisioning crudware.
While DNS server software is regularly updated to handle new RRTYPEs, the web based
packages that most people have to use to manage their DNS is almost never updated,
and usually handles only a small set of RRTYPEs.
This struck me as unfortunate, so I defined a DNS extension
language that provisioning sytems can use to look up the syntax of new RRTYPEs, so
when a new type is created, only the syntax tables have to be updated, not the software.
Paul Vixie had the clever idea to store the tables in the DNS itself (in TXT records
of course), so after a one-time upgrade to your configuration software, new RRTYPEs
work automagically when their description is added to the DNS.
The Internet draft that
describes this has been kicking around for six years, but with support from ICANN (thanks!)
I wrote some libraries and a sample application that implement it.
See more ...
Stable link is https://jl.ly/Internet/extlang.html
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Topics
My other sites
Who is this guy?
Airline ticket info
Taughannock Networks
Other blogs
CAUCE
The Criminals Behind WannaCry
162 days ago
A keen grasp of the obvious
Live from the collander-cam
63 days ago
Related sites
Coalition Against Unsolicited Commercial E-mail
Network Abuse Clearinghouse
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