Re: Tarpitting (was Re: Spam harvesting using Fake Authentication)

2013-08-19 Thread John Hardin
On Mon, 19 Aug 2013, David F. Skoll wrote: On Mon, 19 Aug 2013 08:36:14 -0700 (PDT) John Hardin wrote: [...] In addition, tarpitting is at least partly intended to help *others*, by getting the attacker stuck before it moves on to the next target. OK; I guess it's just a difference in mind

Re: Tarpitting (was Re: Spam harvesting using Fake Authentication)

2013-08-19 Thread David F. Skoll
On Mon, 19 Aug 2013 08:36:14 -0700 (PDT) John Hardin wrote: [...] > In addition, tarpitting is at least partly intended to help *others*, > by getting the attacker stuck before it moves on to the next target. OK; I guess it's just a difference in mindset. I approach the problem with the follow

Re: Tarpitting (was Re: Spam harvesting using Fake Authentication)

2013-08-19 Thread John Hardin
On Mon, 19 Aug 2013, David F. Skoll wrote: On Mon, 19 Aug 2013 07:52:15 -0700 (PDT) John Hardin wrote: Have you considered TCP Tarpitting instead of just blocking them? Blocking them doesn't actually *punish* them. Getting their MTAs *stuck* for hours or days does. IMO, tarpitting is usele

Re: Tarpitting (was Re: Spam harvesting using Fake Authentication)

2013-08-19 Thread John Levine
>It seems to me that greylisting and TCP tarpitting catch both sides of the >problem. Greylisting blocks junk from the single-attempt zombies, and TCP >tarpitting will catch the ones who are persistent offenders. Maybe, probably not. Modern MTAs, even the ones that are not spambots, can run hun

Re: Tarpitting (was Re: Spam harvesting using Fake Authentication)

2013-08-19 Thread David F. Skoll
On Mon, 19 Aug 2013 07:52:15 -0700 (PDT) John Hardin wrote: > >> Have you considered TCP Tarpitting instead of just blocking them? > >> Blocking them doesn't actually *punish* them. Getting their MTAs > >> *stuck* for hours or days does. > > IMO, tarpitting is useless. When you have hundreds, t

Re: Tarpitting (was Re: Spam harvesting using Fake Authentication)

2013-08-19 Thread John Hardin
On Mon, 19 Aug 2013, David F. Skoll wrote: On Mon, 19 Aug 2013 07:31:33 -0700 (PDT) John Hardin wrote: Have you considered TCP Tarpitting instead of just blocking them? Blocking them doesn't actually *punish* them. Getting their MTAs *stuck* for hours or days does. IMO, tarpitting is use

Tarpitting (was Re: Spam harvesting using Fake Authentication)

2013-08-19 Thread David F. Skoll
On Mon, 19 Aug 2013 07:31:33 -0700 (PDT) John Hardin wrote: > Have you considered TCP Tarpitting instead of just blocking them? > Blocking them doesn't actually *punish* them. Getting their MTAs > *stuck* for hours or days does. IMO, tarpitting is useless. When you have hundreds, thousands or