On Wed, Dec 03, 2003, Dennis McRitchie wrote:
>What is the RBL patch, and what are the consequences of not having it? Where
>can I get more information about it?
The RBL patch allows one to specify dnsRBLs (Realtime Blackhole Lists) in
the /etc/hosts.allow file. We used this extensively with smail-3.2 to
block spam. Some entries from one of our servers:
# this one allows anybody in our white hat list
ALL: {RBL}.whl.celestial.net. : ALLOW
# deny from our local database of people who've tried cracking
# or abusing our ftp servers.
ALL: {RBL}.guardian.celestial.net. : DENY
sendmail,smtpd: {RBL}.dynablock.wirehub.net. : DENY
sendmail,smtpd: {RBL}.sbl.spamhaus.org. : DENY
...
Personally I find the RBL capabilities one of the most useful
features of tcp_wrappers.
Bill
--
INTERNET: [EMAIL PROTECTED] Bill Campbell; Celestial Systems, Inc.
UUCP: camco!bill PO Box 820; 6641 E. Mercer Way
FAX: (206) 232-9186 Mercer Island, WA 98040-0820; (206) 236-1676
URL: http://www.celestial.com/
``The meek shall inherit the Earth, the rest of us will go to the stars...''
-Dr. Isaac Asimov
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