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Bug 245966 - RFE: Allow SSH throttling to discourage brute force attacks
RFE: Allow SSH throttling to discourage brute force attacks
Product: Fedora
Classification: Fedora
Component: system-config-firewall (Show other bugs)
All Linux
low Severity low
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Assigned To: Thomas Woerner
Fedora Extras Quality Assurance
: FutureFeature
Depends On:
  Show dependency treegraph
Reported: 2007-06-27 13:51 EDT by Danny D'Amours
Modified: 2013-11-06 14:30 EST (History)
2 users (show)

See Also:
Fixed In Version:
Doc Type: Enhancement
Doc Text:
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Clone Of:
Last Closed: 2013-11-06 14:30:48 EST
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RHEL 7.3 requirements from Atomic Host:
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Description Danny D'Amours 2007-06-27 13:51:09 EDT
Description of problem:

With the SSH port opened via iptables, it is possible for others to run a brute
force ssh attack.

Version-Release number of selected component (if applicable):

How reproducible:

Always on any internet accessible machine

Steps to Reproduce:
1. Open SSH port via iptables or system-config-securitylevel
Actual results:

Logs reveal repeated and constant attempts to login to SSH using common
usernames and passwords

Expected results:

Allow users in system-config-securitylevel to enable throttling on the SSH port
to discourage repeated attempts.  See :
http://la-samhna.de/library/brutessh.html#3 for more details.

Ideally this functionality could be easily exposed as well as having the
parameters customizable.

Additional info:
Comment 1 Thomas Woerner 2007-07-25 07:50:43 EDT
There will be a new firewall configuration tool for Fedora, soon. Mechanisms
like this are on the todo list.
Comment 2 Thomas Woerner 2007-09-21 05:14:58 EDT
Assigning to system-config-firewall in devel.
Comment 3 Jon Stanley 2008-04-23 16:28:39 EDT
Adding FutureFeature keyword to RFE's.
Comment 4 John Poelstra 2008-09-18 17:42:15 EDT
The ability to block hosts which repeatedly fail to login is provided by the denyhosts package.  Should this RFE remain open?
Comment 5 Danny D'Amours 2008-09-19 10:02:00 EDT
denyhosts certainly does the job but I think a GUI to enabled denyhosts and to change the config in system-config-firewall or its replacement is necessary to help expose this functionality.

Is there any chance that denyhosts (with fairly lax restrictions) would be considered to be enabled on default installs?  I can't think of a valid use case where an IP should continually bang on a server with bad passwords.
Comment 6 Thomas Woerner 2013-11-06 14:30:48 EST
Closing because there will not be big changes to system-config-firewall anymore.

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