NPS server ICMP port unreachable

Hi,

A Windows Server 2008 R2 with installed NPS Role responds with ICMP unreachabe to RADIUS requests from network devices. I attached a screenshot of network traffic dump from NetMon.

There is no records in Event Viewer -> Custom Roles -> Network Policy and Access Services.

The settings for NPS logging are ok:

C:\Users\andrei.moraru_admin>auditpol /get /subcategory:"Network Policy Server"
System audit policy
Category/Subcategory                      Setting
Logon/Logoff
  Network Policy Server                   Success and Failure

C:\Users\amoraru_admin>netstat -an | findstr 1813
  UDP    0.0.0.0:1813           *:*
  UDP    [::ffff:127.0.0.1]:1813  *:*

C:\Users\amoraru_admin>netstat -an | findstr 1645
  UDP    0.0.0.0:1645           *:*
  UDP    [::ffff:127.0.0.1]:1645  *:*
C:\Users\amoraru_admin>netstat -an | findstr 1812
  UDP    0.0.0.0:1812           *:*
  UDP    [::ffff:127.0.0.1]:1812  *:*

I have enabled logging to NPS files according to http://technet.microsoft.com/en-us/library/dd348461(v=ws.10).aspx

C:\Users\andrei.moraru_admin>netsh ras set tracing * enabled

In C:\Windows\tracing appeared many files for NPS logs, including IASSAM.LOG and IASRAD.LOG

When I open both files in text editor, i see some strange string:

㑛㠱崴〠ⴴ㌰ㄠ㨲㐰ㄺ㨲㐴㨰䌠湯楦畧楲杮爠浥瑯⁥敳癲牥朠潲灵⹳䄠汬挠畯瑮

I need some special tool to read NPS logging files?

Thanks,

Andrei

---

Andrei Moraru Endava