Date: Sun, 24 Mar 2013 12:01:11 -0400 (EDT) From: Daniel Feenberg <feenberg@nber.org> To: Doug Hardie <bc979@lafn.org> Cc: "freebsd-questions@freebsd.org List" <freebsd-questions@freebsd.org> Subject: Re: Client Authentication Message-ID: <Pine.GSO.4.64.1303241157190.22196@nber6> In-Reply-To: <8680FAB3-4943-4F91-935B-E11511C3FD4E@lafn.org> References: <B2DC7342-9F1A-489A-94F0-49802B1E5DF6@lafn.org> <CAOgwaMvu%2BOC4PiPfNNwoj7aB%2B631Nt_=SwjFG9y89%2BavB6Mp9Q@mail.gmail.com> <8680FAB3-4943-4F91-935B-E11511C3FD4E@lafn.org>
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On Sat, 23 Mar 2013, Doug Hardie wrote: > > On 23 March 2013, at 21:51, Mehmet Erol Sanliturk <m.e.sanliturk@gmail.com> wrote: > >> >> Using Static IP in the client side , and checking Static IP of the user >> may be a possibility : In that way , any message from another IP will >> not be accepted . >> >> If this is possible for your systems , it may be checked for usability >> . >> >> One difficulty is that each user should obtain a Static IP and can not >> connect to his/her ISP from another IP . >> >> Good side is that nobody can connect to ISP of the user from another IP >> : It supplies hardware security ( we are assuming that the user >> computer is not captured ) .. > > That is an interesting idea, but unfortunately our users tend to travel > a lot and need to be able to access mail from anywhere. Also, static > IPs can get quite expensive from some ISPs. Our users are pretty much > on fixed incomes and any expense is a hardship for them. Can you filter outgoing mail with Spamassassin? How about refusing to relay mail from addresses in a good DNSBL? Do you rate-limit outgoing mail? Can you just refuse to relay mail from other continents, using a geolocation service? daniel feenberg > > -- Doug > > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to "freebsd-questions-unsubscribe@freebsd.org" >
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