You can do the same stuff with sendmail allright. At least with the one
found at ftp.cs.berkeley.edu.
Dima
Ehud Gavron writes:
Personally I'm all for it.
My company, ACES Research, uses the mailer from Innosoft
International, PMDF.It does application level refusals *PRIOR* to reception of
the mail. (Unlike sendmail which would accept the mail,
then return it).Try sending mail from *@aol.com to *@aces.com, and see what you get
:-)
Ehud
p.s. We do application-level filter as opposed to router-level
filtering because we want to log the connects/refusals as
they occur. (with sender/recipient attempted address)
>I see the following kind of message on a regular basis. How long before
>this kind of thing starts to cause significant problems? And lest you say
>that xmission.com is only a small unimportant provider, I've seen much
>larger ones also saying they do this and not everybody is as selective
>about only blocking one port.>Michael Dillon - ISP & Internet Consulting
>Memra Software Inc. - Fax: +1-604-546-3049
>http://www.memra.com - E-mail: michael@memra.com>Date: Wed, 21 Aug 1996 15:38:19 -0600 (MDT)
>From: Pete Ashdown <pashdown@xmission.com>
>Reply-To: inet-access@earth.com
>To: inet-access@earth.com
>Subject: *** MAKE SPAM@INTERRAMP.COM DIE FAST!!! ***
>Resent-Date: Wed, 21 Aug 1996 15:39:02 -0600 (MDT)
>Resent-From: inet-access@earth.com>We have seen an inordinate amount of spam email sourcing from Interramp.com
>and their customers. Despite frequent attempts to notify KEN ANDREWS, PSI,
>or any living soul at Interramp, our pleas have gone unanswered. As a
>result, *ALL* SMTP mail traffic from Interramp's networks has been blocked at
>the router level here.>I would encourage *EVERY* responsible ISP to do the same. Interramp does not
>appear to care about spam problems, and in fact has become a haven for this
>type of crap due to their complicity.>The following is instructions on how to block Interramp SMTP traffic on a
>Cisco:>Make an extended IP access list:
>access-list 120 deny tcp 38.8.23.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.8.31.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.8.45.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.8.65.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.9.51.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.10.1.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.10.2.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.10.3.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.10.4.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.10.5.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.10.220.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.11.72.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.11.122.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.11.183.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.11.189.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.11.194.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.11.207.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.11.208.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.11.209.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.11.210.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.11.215.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.11.217.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.11.224.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.11.226.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.11.227.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.11.229.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.11.230.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.11.231.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.11.237.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.11.243.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.11.244.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.12.81.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.12.93.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.12.126.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.12.128.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.12.138.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.12.140.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.12.156.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.12.157.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.12.158.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.12.178.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.12.179.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.12.190.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.12.205.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.12.206.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.12.208.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.12.209.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.12.234.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.12.243.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.14.101.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.14.110.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.14.126.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.14.128.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.14.138.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.14.140.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.14.142.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.14.35.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.14.36.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.14.37.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.14.40.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.14.45.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.14.74.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.14.79.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.14.82.0 0.0.0.255 eq smtp any
>access-list 120 deny tcp 38.26.44.0 0.0.0.255 eq smtp any
>access-list 120 ip permit all all>Due to the fact that Interramp's networks are not contiguous in any apparent
>way, you have to block each one on a class C basis. If anyone sees any
>evidence otherwise, please let me know. Of course, it wouldn't be a bad idea
>to block all of 38.0.0.0 because PSI hasn't been cooperative either.>After the list is created, add it to your incoming interfaces with:
>ip access-group 120 in
>The 120 is arbitrary, it can be anything in the extended IP access-list range.
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