On Jun 10, 2010, at 9:19 PM, Victor Duchovni wrote: > On Thu, Jun 10, 2010 at 11:31:49PM +0200, Ralf Hildebrandt wrote: > >> I heard that there are firewalls/security appliances that supposedly >> can distinguish "somebody using telnet" from "a machine speaking SMTP". >> >> I must admit, it sounds feasible (timing between keystrokes etc.), but >> little useful. >> >> Anyway. Is there such a thing? Does anybody use such a thing? > > Why do you want to discriminate against "telnet 25"? Administrators of > sites that want to trouble-shoot connectivity issues with your server > will use "telnet 25" from time to time. There is no need to block > this, it is by far the least likely source of any significant spam > volume...
Certainly agree. If someone IS doing it ... they have a really good reason. And you would do WELL to make it reasonably easy for them. I had to do it the other day to figure out what was going wrong with a certain hard to debug subsystem. Aloha, Michael. -- "Please have your Internet License http://kapu.net/~mjwise/ and Usenet Registration handy..."
