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In lugnet.people, Todd Lehman writes:
>
> Disable accounts on repeated fails and you make it trivial to DoS someone.
> Disable IP addresses and you lock out the innocent on shared proxy servers.
>
>
Not if you only disable loggin in as that user from that ip.
> I'm not sure if I'm remembering the figures exactly, but IIRC it currently
> passes 6-character pw's containing an average of approximately 24-26 bits of
> unique information. To make pw's more "practical" would mean dropping that
> even further (26 is already somewhat risky) down to something like probably
> 18. Even 2^20 is only one million, and 2^18 is only 1/4 million. If someone
> ran one innocuous HTTP request per second, it would take less than a week to
> make 2^18 attempts in that more relaxed pw validation scenario.
>
> 2^18 is open net hockey for crackers.
I think a minimum of 6 characters is a good limit. It's the character
diversity that is causeing problems. Also, you could make failed attempts
take a few extra seconds to further delay brute force attacks. You
cold even make successful logins take a few extra seconds just for good
measure.
BTW, no password is required to post right?
KL
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Message has 1 Reply:
 | | Re: LUGNET Memberships
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| (...) Is there a way to tell if a given IP address is a shared proxy server or not? If you disable login access as one user from a given IP address, then you effectively disable login access as _all_ users from that IP address, because it would be (...) (24 years ago, 25-Sep-00, to lugnet.people, lugnet.admin.general)
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Message is in Reply To:
| | Re: LUGNET Memberships
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| (...) ouch. How easy is it for a thief to get your customer number? How many digits is your PIN? (...) natch. :) (...) Disable accounts on repeated fails and you make it trivial to DoS someone. Disable IP addresses and you lock out the innocent on (...) (24 years ago, 25-Sep-00, to lugnet.people, lugnet.admin.general)
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