On 01/05/2017 10:58 AM, Ramon Medeiros wrote:
On 01/05/2017 10:14 AM, Aline Manera wrote:
> Hi Ramon,
> On 12/22/2016 01:59 PM, Ramon Medeiros wrote:
>> Propose: make adjustments at login page to make difficult brute
>> force attack.
>> Today, an intruder can make login tries without any action from Wok.
>> Possible measures:
>> Record source port and ip. After 3 tries, block user for 30 seconds
>> and increase the time by each more try. Using source port and ip
>> will avoid errors for connections from NAT networks.
>> 1) ip 192.168.1.1 tries to login as root 3 times and fail
> You will consider ip and port, right? So when ip and port tries to
> login as root 3 times and fail...
>> 2) A timeout of 30 seconds will be set
> Does that mean the user will not be allowed to perform a login action
> for 30 seconds?
yep. based on ip and port
>> 3) After that, for 5 minutes, each try will add 30 seconds + x times
>> the trial (60 seconds, 90 seconds. ..)
> Not sure I got what you want here. After the 30 seconds block, the
> user will be able to try to login again.
> How many attempts he/she can try to login again before get blocked?
> Will he/she get blocked for 5 minutes in the second round of attempts?
I was thinking about this:
1st try -> denied
2nd try -> denied
3rd try -> denied
After this 30s, other timeout will be added, letting user try just 1
time. If the mismatch continues, more time will be added. Let me explain:
5 minutes window:
4th try -> denied
Then we will add a new timeout block, but greater (60s)
After 60s timeout:
5th try -> denied
New timeout 90s
So, after received a 30s timeout, the user will be 5 minutes sensible
to the algorithm. Let me know if it was clear
Yeap! It is clearer now. I'd suggest to let user tries at least 3 times
before blocking him/her again.
first 3 failures = block for 30 seconds
more 3 failures = block for 1 min
more 3 failures = block for 2 min
more 3 failures = block for 3 min
>> 4) After 5 minutes of the last try, the counter will be reset.
>> Ramon Nunes Medeiros
>> Kimchi Developer
>> Linux Technology Center Brazil
>> IBM Systems & Technology Group
>> Phone : +55 19 2132 7878
>> Kimchi-devel mailing list
Ramon Nunes Medeiros
Linux Technology Center Brazil
IBM Systems & Technology Group
Phone : +55 19 2132 7878