Yubico Forum

...visit our web-store at store.yubico.com
It is currently Tue Jan 30, 2018 3:10 pm

All times are UTC + 1 hour




Post new topic Reply to topic  [ 2 posts ] 
Author Message
 Post subject: Fallback configuration
PostPosted: Sun Jan 22, 2012 2:22 am 
Offline

Joined: Sun Jan 22, 2012 2:14 am
Posts: 1
Hi,
I'm trying to set up a 2-way yubikey authentification (using yubico-pam and an internal server) on my server and came across a problem I couldn't solve.
What i'm trying to do is to set up a fallback configuration in case my validation server goes dark so that I don't get locked out.
So, I did use the distinction pam can make between auth_err and authinfo_unavail to achieve that. (like it is explained here : http://forum.yubico.com/viewtopic.php?f=3&t=739)
However, depending on the kind of issue the validation server is experiencing, it may fail :
- If I cut out the network from the server itself, the fallback configuration is indeed used and therefor it's good.
- But if the server is network-reachable but simply not responding (service down, iptable ban, etc.), it seems the yubico-pam module is waiting without restraint for it to answer, until the login attempt itself timeouts, therefore not granting a session. I didn't find how to configure a shorter timeout for the pam module.

Does any of you has an solution ?


Top
 Profile  
Reply with quote  

Share On:

Share on Facebook FacebookShare on Twitter TwitterShare on Tumblr TumblrShare on Google+ Google+

PostPosted: Fri Jan 27, 2012 5:32 pm 
Offline
Yubico Team
Yubico Team

Joined: Mon Feb 22, 2010 9:49 am
Posts: 183
Hi,

Currently there is no configurable timeout in yubico-c-client.

Also, please note, the 2FA approach explained above could be circumvented by anyone who is able to DoS the connectivity between the validation client and the server.

Thanks,
Samir.


Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 2 posts ] 

All times are UTC + 1 hour


Who is online

Users browsing this forum: No registered users and 2 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Group