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r12355@catbus: nickm | 2007-04-14 11:52:20 -0400

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Rename DNSBL to DNSEL.


svn:r9952
This commit is contained in:
Nick Mathewson 2007-04-14 16:59:41 +00:00
parent a3fda1ba03
commit a4fb12a425
1 changed files with 12 additions and 12 deletions
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24
doc/contrib/torbl-design.txt
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@ -1,9 +1,9 @@
Design For A Tor RBL {DRAFT}
Design For A Tor DNS-based Exit List
Status:
This is a suggested design for a DNSBL for Tor exit nodes. It hasn't been
implemented.
This is a suggested design for a DNS Exit List (DNSEL) for Tor exit nodes.
It hasn't been implemented.
Why?
@ -29,10 +29,10 @@ Why?
identify which Tor nodes might open anonymous connections to any given
exit address. But this is a bit tricky to set up, so only sites like
Freenode and OFTC that are dedicated to privacy use it.
Conversely, providers of some DNSBL implementations are providing
Conversely, providers of some DNSEL implementations are providing
coarse-grained lists of Tor hosts -- sometimes even listing servers that
permit no exit connections at all. This is rather a problem, since
support for DNSBL is pretty ubiquitous.
support for DNSEL is pretty ubiquitous.
How?
@ -54,13 +54,13 @@ How?
The DNS interface
DNSBL, if I understand right, looks like this: There's some host at
foo.example.com. You want to know if 1.2.3.4 is in the list, so you
query for an A record for 4.3.2.1.foo.example.com. If the record
exists, 1.2.3.4 is in the list. If you get an NXDOMAIN error, 1.2.3.4
is not in the list.
Standard DNSEL, if I understand right, looks like this: There's some host
at foo.example.com. You want to know if 1.2.3.4 is in the list, so you
query for an A record for 4.3.2.1.foo.example.com. If the record exists,
1.2.3.4 is in the list. If you get an NXDOMAIN error, 1.2.3.4 is not in
the list.
Assume that the DNSBL sits at some host, torhosts.example.com. Below
Assume that the DNSEL sits at some host, torhosts.example.com. Below
are some queries that could be supported, though some of them are
possibly a bad idea.
@ -160,7 +160,7 @@ Other issues:
masks wider than /8 make me nervous here, as do port ranges.
We need an answer for what to do about hosts which exit from different
IPs than their advertised IP. One approach would be for the DNSBL
IPs than their advertised IP. One approach would be for the DNSEL
to launch periodic requests to itself through all exit servers whose
policies allow it -- and then see where the requests actually come from.