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| Newer page: | version 2 | Last edited on Sunday, August 8, 2004 9:34:51 am | by AristotlePagaltzis | |
| Older page: | version 1 | Last edited on Thursday, August 5, 2004 4:23:57 pm | by PerryLorier | Revert |
@@ -1,9 +1,7 @@
[Acronym] for __R__ealtime __B__lack __L__ist
-a
list of hosts you may wish to blacklist updated in realtime, usually distributed via DNS
. Realtime blacklists originally were
created as lists of
open relays, so that people could block spam that was being delivered via them. This gradually grew to include blacklisting
hosts for other
reasons (
open proxies
, sending spam
directly, political views oppose your own)
.
+A constantly updated
list of hosts sending [Email]
you may wish to reject
. Originally
created to list
open relays abused to send [Spam]
, there are now various [RBL]s which also blacklist
hosts for reasons such as being an
open [Proxy]
, sending [Spam]
directly, or having
political views that
oppose your own.
-Mailservers then
are configured to check a RBL everytime they recieve
a mail connection to determine if they should drop
the connection
.
+[RBL]s
are usually queried via [DNS], by looking up <tt>''ip''.rbl.example.com</tt>. Lookups for blacklisted hosts return an A record (usually for 127...2) and/or
a TXT record (explaining why
the host is blacklisted)
.
-RBL'
s are usually done by looking up ip.rbl.somedomain.com and seeing if it contains
an A record (usually 127
...2) and/or a TXT record (explaining why it's banned).
-
-Many
people subscribe to multiple RPL'
s.
+[MailServer]s can be configured to check [
RBL]
s to determine whether they should accept
an incoming [SMTP] connection
. Most
people subscribe to multiple [RBL]
s.
