Distribution point IIS logs are showing a lot of 401.2 errors

Hello,

Since a couple of day we are experiencing software download issue (hangs).

I had a look on the IIS logs on the DP's and found a lot of 402.1 errors

10.248.10.15 GET /SMS_DP_SMSPKG$/6fc3dcab-3fc2-4fac-8a72-e0e33c0a2b34/sccm /windowsxp-kb2957503-x86-custom-enu.exe 80 - 179.1.74.39 Microsoft+BITS/6.7 401 2 5 1509 0

10.248.10.15 GET /SMS_DP_SMSPKG$/6fc3dcab-3fc2-4fac-8a72-e0e33c0a2b34/sccm /windowsxp-kb2957503-x86-custom-enu.exe 80 MSNET\PCNAME$ 179.1.74.39 Microsoft+BITS/6.7 206 0 0 67130

They are always two lines. One with the ip only and 401.2 error and a second line with Computername and ip and code 206

Any idea of what is happening ?

Regards,

Michel