[tor-relays] List of Relays' Available SSH Auth Methods

Libertas libertas at mykolab.com
Tue Nov 18 18:51:58 UTC 2014


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Password brute-forcing is still a threat with fail2ban because your
username and password can be compromised without your knowledge more
easily than a private key. It's discussed in this talk, which I linked
earlier:

http://www.bsdcan.org/2013/schedule/events/403.en.html

On 11/18/2014 01:10 PM, Dan Rogers wrote:
> 
> 
> IMO there could occasionally be reasons not to use key logins
> (although I do normally disable pwd login). E.g. if I have a key, I
> then have evidence somewhere (USB/HD), whereas a secure password
> can be kept only in my head (until they waterboard me). Especially
> in countries (e.g. the UK) that can force you to hand over
> encryption keys. I'd rather have an insecure Tor node than get
> arrested (although tbh with fail2ban installed I don't think pwd
> bruteforcing is a threat).
> 
> 
> 
> On 18/11/14 17:46, Jeroen Massar wrote:
>> On 2014-11-18 18:38, Kevin de Bie wrote:
>>> Fail2Ban works really well. Shifting to a non standard port
>>> only stops the scriptkids from having too much automated
>>> options and does not do anything for actual security. For this
>>> reason I personally never bothered with that. Non standard
>>> username and password auth with fail2ban makes brute forcing
>>> practically impossible, this is usually how I have things
>>> configured.
>> Just changing it to key-based authentication stops ALL
>> password-guessing attacks.
>> 
>> You will then be left with the logs though.
>> 
>> 
>> Hence lets make a little list for clarity in order of "should at
>> least do":
>> 
>> - Use SSH Authentication - Disable Password Authentication - Use
>> Fail2ban - Restrict on IP address (no need for fail2ban then)
>> 
>> Greets, Jeroen
>> 
>> _______________________________________________ tor-relays
>> mailing list tor-relays at lists.torproject.org 
>> https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-relays
> 
> -- Dan Rogers +44 7539 552349 skype: dan.j.rogers gpg key
> <https://secure.techwang.com/gpg/public_key.txt> linkedin
> <http://www.linkedin.com/in/danrogerslondon> | twitter 
> <http://twitter.com/danjrog> | spotify 
> <http://open.spotify.com/user/bonkbonkonk> | music 
> <http://holdingitwrong.com>
> 
> 
> _______________________________________________ tor-relays mailing
> list tor-relays at lists.torproject.org 
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> 
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