12:25 p.m.
Got a new issue:
When using username+ ip + port as unique identifier, i saw that the port
is not used too much times. Take a look at this log:
{
u'a127.0.0.153634': [{'username': u'a', 'ip':
'127.0.0.1', 'port':
53634, 'time': 1484672673.735578}], u'a127.0.0.153636':
[{'username':
u'a', 'ip': '127.0.0.1', 'port': 53636, 'time':
1484672676.018149}],
u'a127.0.0.153630': [{'username': u'a', 'ip':
'127.0.0.1', 'port':
53630, 'time': 1484672664.44004}], u'a127.0.0.153632':
[{'username':
u'a', 'ip': '127.0.0.1', 'port': 53632, 'time':
1484672668.298648}],
u'a127.0.0.153628': [{'username': u'a', 'ip':
'127.0.0.1', 'port':
53628, 'time': 1484672661.977025}]
}
In 5 tries, 5 different ports were used. So, remote port isn't a good
information.
I tried to use cherrypy.session.originalid. Which, seems to be better.
take a look at this test:
4 attemps, the first went with a different originalid. The others with
the same:
{u'a127.0.0.13534ea7fa9cdb23e37ae914f2e6cf7b0e04dab28': [{'username':
u'a', 'ip': '127.0.0.1', 'port': 53770, 'time':
1484673652.558314}],
u'a127.0.0.1a7f2be8054048de62d2ce90e57939ee5ebb55fae': [
{'username': u'a', 'ip': '127.0.0.1', 'port':
53772, 'time':
1484673655.356095},
{'username': u'a', 'ip': '127.0.0.1', 'port':
53774, 'time':
1484673657.863454},
{'username': u'a', 'ip': '127.0.0.1', 'port':
53776, 'time':
1484673660.436111}]}
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.
Example:
1) ip 192.168.1.1 tries to login as root 3 times and fail
2) A timeout of 30 seconds will be set
3) After that, for 5 minutes, each try will add 30 seconds + x times
the trial (60 seconds, 90 seconds. ..)
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
ramonn(a)br.ibm.com
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--
Ramon Nunes Medeiros
Kimchi Developer
Linux Technology Center Brazil
IBM Systems & Technology Group
Phone : +55 19 2132 7878
ramonn(a)br.ibm.com