>From: "Will Mitayai Keeso Rowe" <[EMAIL PROTECTED]>
>Date: Thu, 6 Jan 2000 14:43:19 -0500
>ok, so how would i deny access to an entire C-Class?
Quoting from /usr/src/contrib/sendmail/cf/README, beginning at line
1276:
An ``access'' database can be created to accept or reject mail from
selected domains. For example, you may choose to reject all mail
originating from known spammers. To enable such a database, use
FEATURE(access_db)
The FEATURE macro can accept a second parameter giving the key file
definition for the database; for example
FEATURE(access_db, hash -o /etc/mail/access)
Remember, since /etc/mail/access is a database, after creating the text
file as described below, you must use makemap to create the database
map. For example:
makemap hash /etc/mail/access < /etc/mail/access
The table itself uses e-mail addresses, domain names, and network
numbers as keys. For example,
[EMAIL PROTECTED] REJECT
cyberspammer.com REJECT
192.168.212 REJECT
would refuse mail from [EMAIL PROTECTED], any user from cyberspammer.com
(or any host within the cyberspammer.com domain), and any host on the
192.168.212.* network.
The value part of the map can contain:
OK Accept mail even if other rules in the
running ruleset would reject it, for example,
if the domain name is unresolvable.
RELAY Accept mail addressed to the indicated domain or
received from the indicated domain for relaying
through your SMTP server. RELAY also serves as
an implicit OK for the other checks.
REJECT Reject the sender or recipient with a general
purpose message.
DISCARD Discard the message completely using the
....
Please note that the example given would cause attempts to establish a
SMTP connection form anywhere in the class C 192.168.212.0/24 to be
rejected (as the quoted text indicates).
Cheers,
david
--
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