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Re: [Radiusplugin-users] OpenVPN Server Stalls on Radius Server Failure


From: William Cooley
Subject: Re: [Radiusplugin-users] OpenVPN Server Stalls on Radius Server Failure
Date: Wed, 31 Mar 2010 22:25:44 +0200
User-agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1.8) Gecko/20100227 Lightning/1.0b1 Thunderbird/3.0.3

Any chance you have usernames with spaces?
Actually I think if a user accidentally adds a space in the username (even after the username) that will crash the plugin. I think that is one of the bugs with 2.0c. But as Ralf said without a higher log level it's hard to tell what the problem is.

On 3/31/2010 9:49 PM, Dustin Wilhoit wrote:
I will get some detailed logs of the failure but it may be a week or so before 
I'll be able to get the time to lab it all up.  My previous logs show almost 
nothing on the default logging level and I can't really play around with them 
since they are in production use now.

I am not sure how long it takes after the radius failure for the OpenVPN 
service to seize up but I think it's at least a few minutes if not more.  
Perhaps it also needs clients trying to connect to push it over the edge?  
Again, I'll try to get you more details as soon as I can.

Dustin Wilhoit
Network Engineer
Cybera Inc.

-----Original Message-----
From: address@hidden [mailto:address@hidden On Behalf Of Ralf Lübben
Sent: Wednesday, March 31, 2010 2:42 PM
To: address@hidden
Subject: Re: [Radiusplugin-users] OpenVPN Server Stalls on Radius Server Failure

I have just tested the plugin (2.0c) if the radius server is not available or
switched off during users are connected and with random connects and
disconnects. I could not reprocuce the error.

It would be helpfull if someone can provide some log files after the server has
crashed.

Ralf

Am Mittwoch, 31. März 2010 12:06:40 schrieb Eike Lohmann:
I have made the same experience in the past, but have no further
information on this.

Regards, Eike

Am 27.03.2010 17:51, schrieb Ralf Lübben:
Hi,

if the problem occurs if all RADIUS servers are down it is probably
related to the plugin, but without a log file it is only guessing.

Please use a OpenVPN verbosity level equal to 5, than you will get
additional output from the plugin in the log files. Maybe this will give
a hint.

You can also try the beta version of the plugin, a lot of issues where
fixed in the last days.

Ralf

Am Samstag, 27. März 2010 17:37:43 schrieb Dustin Wilhoit:
I work for a company that is using OpenVPN for remote site connectivity
and currently we are in the process of migrating from using the PAM
radius plugin to using radiusplugin on a new set of servers.  Love the
ability to use radius attributes and accounting.

I have run into a reproducible issue that cause the openvpn processes to
go offline(lockup).  I currently can't do more troubleshooting on it
till I get a lab mock-up (since all we have currently is in production)
of everything up but recently we've had some radius server failures
where they go offline for a bit (all of them) and it seems OpenVPN
stalls and never comes back on it's own, restarting the processes does
work.

I wanted to ask you if you've seen behavior like this and is this
intended or is there perhaps a bug somewhere in OpenVPN or radiusplugin
possibly causing this issue?

The failure occurs when all the radius servers go offline, I have not
seen the issue if one of the servers remains online and available.

We are running RadiusPlugin 2.0c and OpenVPN 2.1rc11.
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