Re: (RADIATOR) Orinoco AP-500/1000 MAC auth problem

2002-09-24 Thread Karl Gaissmaier

Hello,

...
I don't need this Reply Attributes, really. Are you really sure this
is needed in your environment? If this is the truth, perhaps we should
talk about Firmware versions, but since AP500 V.3.83 it was really not
necessary
to spend reply attributes here in my environment, just empty Access
Accept packets.

 
 
 My AP-500 has V3.95. Since the AP serves more than just one wireless
 device, it seems reasonable that AP needs to know which MAC address
 username the RADIUS is granting the access. NAS-IP-address I know for sure
 is necessary in my case since the AP is behind a firewall, and the
 AP request (on behalf of the wireless device) is NATed and sent through a
 router to the RADIUS in another network. The inbound message from the
 RADIUS to the router certainly has to provide NAS-IP-address information
 for the router to know which device behind the firewall should pick up
 (without a broadcast through the entire subnet).

First, I'm also running a lot of AP-500 with Firmware v.3.95 and MAC 
address based authorization, handled by a radius server (radiator)
with more than 400 wireless users in the moment, still very fast growing.

The AP sends an access-request with the following attributes to the 
radius server:

###
Code:   Access-Request
Identifier: 134
Authentic:  1641831461358r20628Q9154195169225Y
Attributes:
 NAS-IP-Address = 212.17.1.7
 User-Name = 00022d-0eaae0
 User-Password = G`173'192242!147:1371750n0182


Code:   Access-Accept
Identifier: 134
Authentic:  1641831461358r20628Q9154195169225Y
Attributes:
###

the radius server checks in my configuration just the User-Name, and
this is in this context the MAC-addr in the format xx-xx.

The password sent by the AP is just the shared secret between the
AP and teh radius server, you have no user based passwords without 802.1X.

  My AP-500 has V3.95. Since the AP serves more than just one wireless
  device, it seems reasonable that AP needs to know which MAC address

The NAS knows already the MAC address, because he sends the 
Access-Request with the Identifier (e.g.134, see the example above), the 
Access-Accept has this same Identifier and then the NAS knows the 
accepted MAC

  username the RADIUS is granting the access. NAS-IP-address I know for 
sure
  is necessary in my case since the AP is behind a firewall, and the
  AP request (on behalf of the wireless device) is NATed and sent through a
  router to the RADIUS in another network. The inbound message from the
  RADIUS to the router certainly has to provide NAS-IP-address information
  for the router to know which device behind the firewall should pick up
  (without a broadcast through the entire subnet).

do you really believe your NAT Router is able to decode the radius 
Accept packet, gaining the Radius Attribute NAS-IP-address and then 
sending this to the proper target. Please tell me the vendor and model 
of this wonderfull device.

No, normally this is done by a state table, IP addrs, protocol and ports 
so the NAT router knows to where to send the answer packets, I'm quite 
sure this is also in your environment.

Regards
Charly

P.S. please send us a snippet of your config and your users file for MAC 
based WLAN authentication

-- 
Karl Gaissmaier Computing Center,University of Ulm,Germany
Email:[EMAIL PROTECTED] Network Administration
Tel.: ++49 731 50-22499

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(RADIATOR) Loadbalance

2002-09-24 Thread rcortez

hi hugh,

 in our setup having 2 radius server (wiht 2 instance of radiator 
running on each machine) and 1 oracle server. will there be an 
advantage if we are going to use radiator loadbalancing if our ras port 
grows from the current 1,500 ports to 5,000 ports? d oracle database is 
hosting both prepaid and post paid system with peak and off-peak rating 
and with credit limit on postpaid customers. all dial-up are terminated 
through L2TP. our radius servers are idle most of the time. the highest 
utilization that we are getting during peak hour is from 15% to 20% 
only. will the radius capacity increase if we add 2 more instance of 
radiator on the radius server (having a total of 4 instance per 
server). one of the 4 instances will be configured as proxy 
(loadbalancer to the 3 remaining instance of radius). do you have a 
reference site that uses loadbalancing feature of radiator?

thank you  



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Re: (RADIATOR) Loadbalance

2002-09-24 Thread Hugh Irvine


Hello Ray -

I don't think using loadbalancing in the way you describe will gain you 
anything.

You would probably do better running two instances of Radiator, one to 
process authentication requests and the other to process accounting 
requests. This tends to work better, because there are twice as many 
accounting requests as authentication requests (start and stop for 
every access). There is usually more overhead involved in processing 
accounting requests as well, but if it is in a seperate process, it 
doesn't get in the way of the authentication requests.

The loadbalancing is really designed to spread requests across seperate 
machines, which of course you should have in any case.

regards

Hugh


On Wednesday, September 25, 2002, at 11:40 AM, [EMAIL PROTECTED] 
wrote:

 hi hugh,

  in our setup having 2 radius server (wiht 2 instance of radiator
 running on each machine) and 1 oracle server. will there be an
 advantage if we are going to use radiator loadbalancing if our ras port
 grows from the current 1,500 ports to 5,000 ports? d oracle database is
 hosting both prepaid and post paid system with peak and off-peak rating
 and with credit limit on postpaid customers. all dial-up are terminated
 through L2TP. our radius servers are idle most of the time. the highest
 utilization that we are getting during peak hour is from 15% to 20%
 only. will the radius capacity increase if we add 2 more instance of
 radiator on the radius server (having a total of 4 instance per
 server). one of the 4 instances will be configured as proxy
 (loadbalancer to the 3 remaining instance of radius). do you have a
 reference site that uses loadbalancing feature of radiator?

 thank you



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Radiator: the most portable, flexible and configurable RADIUS server
anywhere. Available on *NIX, *BSD, Windows 95/98/2000, NT, MacOS X.
-
Nets: internetwork inventory and management - graphical, extensible,
flexible with hardware, software, platform and database independence.

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Re: (RADIATOR) Loadbalance

2002-09-24 Thread rcortez


hi hugh,

   does this mean if we ever encounter performance problem
(i.e. slow auth, lost stop records) we need to separate the 
authetication from accounting. and accquire additional radius 
server to handle accounitng packets. and may be, add a load balancing
server (radiator)to spread the work among 3 servers?

thanks,
ray
- Original Message -
From: Hugh Irvine [EMAIL PROTECTED]
Date: Wednesday, September 25, 2002 10:07 am
Subject: Re: (RADIATOR) Loadbalance

 
 Hello Ray -
 
 I don't think using loadbalancing in the way you describe will 
 gain you 
 anything.
 
 You would probably do better running two instances of Radiator, 
 one to 
 process authentication requests and the other to process 
 accounting 
 requests. This tends to work better, because there are twice as 
 many 
 accounting requests as authentication requests (start and stop for 
 every access). There is usually more overhead involved in 
 processing 
 accounting requests as well, but if it is in a seperate process, 
 it 
 doesn't get in the way of the authentication requests.
 
 The loadbalancing is really designed to spread requests across 
 seperate 
 machines, which of course you should have in any case.
 
 regards
 
 Hugh
 
 
 On Wednesday, September 25, 2002, at 11:40 AM, [EMAIL PROTECTED] 
 wrote:
 
  hi hugh,
 
   in our setup having 2 radius server (wiht 2 instance of 
 radiator running on each machine) and 1 oracle server. will there 
 be an
  advantage if we are going to use radiator loadbalancing if our 
 ras port
  grows from the current 1,500 ports to 5,000 ports? d oracle 
 database is
  hosting both prepaid and post paid system with peak and off-peak 
 rating and with credit limit on postpaid customers. all dial-up 
 are terminated
  through L2TP. our radius servers are idle most of the time. the 
 highest utilization that we are getting during peak hour is from 
 15% to 20%
  only. will the radius capacity increase if we add 2 more 
 instance of
  radiator on the radius server (having a total of 4 instance per
  server). one of the 4 instances will be configured as proxy
  (loadbalancer to the 3 remaining instance of radius). do you 
 have a
  reference site that uses loadbalancing feature of radiator?
 
  thank you
 
 
 
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 -- 
 Radiator: the most portable, flexible and configurable RADIUS server
 anywhere. Available on *NIX, *BSD, Windows 95/98/2000, NT, MacOS X.
 -
 Nets: internetwork inventory and management - graphical, extensible,
 flexible with hardware, software, platform and database independence.
 
 ===
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