On Sat, 15 Mar 2003, Suresh Ramasubramanian wrote:
> This box can, quite legitimately, accept connections from only one set of
> machines (the primary and backup MXs for the domains it serves) and return
> a 554 on connection for all other IPs - perhaps using something like
> rblsmtpd or tcpwrappers.
Hmm.. rblsmtpd behaves differently from what I said.
This is an example - telnet session to a server which is using rblsmtpd to
block all of APNIC (do I hear a loud shout of "stupid idiots"?) :)
Keep issuing 220s but 5xx after RCPT TO.
suresh@frodo 06:04:43 [~]$ telnet roundrobin.beer.com 25
Trying 209.171.53.28...
Connected to roundrobin.beer.com.
Escape character is '^]'.
220 rblsmtpd.local
ehlo frodo.hserus.net
250 rblsmtpd.local
mail from: <suresh@???>
250 rblsmtpd.local
rcpt to: <postmaster@???>
553 Asia Pacific Network Spam
rset
250 rblsmtpd.local
quit
221 rblsmtpd.local
Connection closed by foreign host.
srs
--
mallet@??? (Suresh Ramasubramanian)
jaharkes@ravel:/usr/src$ mv linux Gnu/Linux
mv: cannot move `linux' to `Gnu/Linux': No such file or directory
jaharkes @ cs.cmu.edu in reply to RMS on linux.kernel
