IAS Code 16

[gtmtnbiker98]

I have a Cisco VPN/Router trying to authenticate to our
AD domain using Windows 2003 IAS. In the Event Viewer of
the server running IAS, I am receiving an error code
16, "unknown username and password." The IAS machine is
also a domain controller and the account that I am using
is allowed dial-up access using Windows authentication.
The username and password being used are correct and the
account is not locked out.

On the IAS configuration, I am using RADIUS standard. I
have also tried Cisco; however, I am receiving the same
result. The IAS server is registered in Active
Directory. Any thoughts or recommendations?

Please help.

[gtmtnbiker98]

Must a shared secret be used between the IAS server and
the client?

-----Original Message-----
I have a Cisco VPN/Router trying to authenticate to our
AD domain using Windows 2003 IAS. In the Event Viewer

of

the server running IAS, I am receiving an error code
16, "unknown username and password." The IAS machine is
also a domain controller and the account that I am using
is allowed dial-up access using Windows authentication.
The username and password being used are correct and the
account is not locked out.
On the IAS configuration, I am using RADIUS standard. I
have also tried Cisco; however, I am receiving the same
result. The IAS server is registered in Active
Directory. Any thoughts or recommendations?
Please help.
.

[Teverovsky, Guy]

Shared secret is between RADIUS server (IAS) and RADIUS client (your Cisco
router/VPN) and if those do not match on both sides, any authentication
attempt will fail.
You can also enable IAS logging by running "netsh ras set tracing * enabled"
on IAS server and the client and examine the logs at %systemroot%\tracing
folder.

Guy

Post by gtmtnbiker98
Must a shared secret be used between the IAS server and
the client?

-----Original Message-----
I have a Cisco VPN/Router trying to authenticate to our
AD domain using Windows 2003 IAS. In the Event Viewer

of

the server running IAS, I am receiving an error code
16, "unknown username and password." The IAS machine is
also a domain controller and the account that I am using
is allowed dial-up access using Windows authentication.
The username and password being used are correct and the
account is not locked out.
On the IAS configuration, I am using RADIUS standard. I
have also tried Cisco; however, I am receiving the same
result. The IAS server is registered in Active
Directory. Any thoughts or recommendations?
Please help.
.