Hi Ivan, Really, I appreciate the information. I'm sure between the suggestions given I could do it. However, if it is more than a command line or script on the radius server itself, its too involved for the person I have to turn it over to. I just saw that radtest took nasname as an option and thought it would have a bearing on the secret. Not the case, so I know better. :) Thanks, Tuc
If you have a spare box on a local network, switch that supports VLANs and a router that can tag VLANs - you can spoof the whole outside network with simple IP/VLAN configuration:
configure a gateway IP interface for the network you want to spoof on your router and tag it with testing VLAN ID - that will create a locally connected routing table entry - no creative manual entries needed
configure testing VLAN ID on the switchport to which you will connect the testing box
configure IP you want to spoof on the testing box
That shouldn't take more than 5 minutes. Just make sure that you remove the spoofed gateway interface from the router after testing in order to be able to use the real network.
Ivan Kalik Kalik Informatika ISP
Dana 4/5/2008, "Tuc at T-B-O-H.NET" <ml@t-b-o-h.net> pi�e:
Hi,
Tech calls in and say that he can't get an appliance working in the field. I ask him what secret he's using and the IP address of the appliance. I want to be able to be locally logged onto the radius server and use radtest/radclient/rad???? to be able to query radius asking "If I was IP, and I gave you SECRET, would you authorize me?".
So I want to be on 1.2.3.4, but say I'm on 3.4.5.6 . Right now, If I say I'm on 3.4.5.6, it still wants the secret for 1.2.3.4 .
you want to spoof the source address? tricky. one 'easy' way to do this would be to create a local VPN/GRE tunnel on the linux box under which you could emulate a remote link.
configure freeradius to also listen on that virtual address, run the radclient with the destination being the end point of the VPN - the linux routing tables would then come into play. you'd have to reconfigure the VPN end addresses etc each time to emulate an outside world link...but it would work.
Not worth it. All I'm looking to do is get programatic confirmation that the ip/secret combination in the field is correct. Since this is an appliance, not an OS, I don't have access to radtest on the appliance. To have someone start setting up VPN/GRE/etc is more hassle than its worth. I just have to tell the tech to RTFD closer. I was just hoping I could put together a local form on a webserver that could shell out to a script to make the test.
We'll just have to suffer. :) (Or ask the manufacturer to include a utility in the "diagnostic" section)
Thanks, Tuc - List info/subscribe/unsubscribe? See http://www.freeradius.org/list/users.html
- List info/subscribe/unsubscribe? See http://www.freeradius.org/list/users.html