Date: Tue, 21 Sep 1999 19:45:16 -0400 From: Mike Tancsa <mike@sentex.net> To: "Mr. K." <bsd@a.servers.aozilla.com> Cc: security@FreeBSD.ORG Subject: Re: Sendmail blocking of spammers (was Re: hackers?) Message-ID: <4.1.19990921194237.05e17600@granite.sentex.ca> In-Reply-To: <Pine.BSF.4.10.9909211919390.10661-100000@inbox.org> References: <3.0.5.32.19990921153905.01499100@staff.sentex.ca>
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At 07:20 PM 9/21/99 , Mr. K. wrote: >> You have another option. If you have tcp_wrappers installed (its installed >> in all 3.[2|3] versions by default), you can deny by sub domain. The >> spammers are coming from *.ipt.aol.com. Block from that subdomain on. AOL >> for its mail exchangers are all of the form xx.mx.aol.com, not ipt.aol.com >> e.g. >> aol.com preference = 15, mail exchanger = zd.mx.aol.com >> >> ---Mike >> >ah, good idea. will that block aol users from accessing my website, >though? You dont have to wrap uniformly for all services. You would do this only for sendmail. e.g. in your /etc/hosts.allow sendmail : .evil.cracker.example.com : deny sendmail : .ipt.aol.com : deny There is generally no reason those dialup customers would want to / need to speak directly to your mail server. ---Mike ********************************************************************** Mike Tancsa, Network Admin * mike@sentex.net Sentex Communications Corp, * http://www.sentex.net/mike Cambridge, Ontario * 01.519.651.3400 Canada * To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-security" in the body of the message
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