I have made a network dump with Wireshark. I am not an SMB expert so I don't know if the below is normal behaviour.
Can somebody help me?
1. I map the directory \\NAS\DIR on drive letter Z:\
2. Win7 does a Session Setup twice
3. Win7 tries to open \desktop.ini. The NAS says it does not exist
4. Win7 tries to open '\'. The NAS opens it and says it's a directory.
5. Win7 does a Session Setup four times
6. Win7 gives the error "Z:\ is not accessible - An unexpected network error occurred."
No. Time Source Destination Protocol Info
32 14.963008 192.168.100.146 192.168.100.102 SMB Negotiate Protocol Request
33 14.977313 192.168.100.102 192.168.100.146 TCP microsoft-ds > 49568 [ACK] Seq=1 Ack=160 Win=6432 Len=0
34 14.983507 192.168.100.102 192.168.100.146 SMB Negotiate Protocol Response
35 15.183500 192.168.100.146 192.168.100.102 TCP 49568 > microsoft-ds [ACK] Seq=160 Ack=96 Win=17425 Len=0
43 22.724227 192.168.100.146 192.168.100.102 SMB Session Setup AndX Request, User: DOMAIN\user; Tree Connect AndX, Path: \\NAS\DIR
44 22.755653 192.168.100.102 192.168.100.146 SMB Session Setup AndX Response; Tree Connect AndX
45 22.954996 192.168.100.146 192.168.100.102 TCP 49568 > microsoft-ds [ACK] Seq=368 Ack=214 Win=17307 Len=0
46 23.255229 192.168.100.146 192.168.100.102 SMB Session Setup AndX Request, User: DOMAIN\user
48 23.267427 192.168.100.102 192.168.100.146 SMB Session Setup AndX Response
49 23.270984 192.168.100.146 192.168.100.102 SMB Session Setup AndX Request, User: DOMAIN\user
50 23.277999 192.168.100.102 192.168.100.146 SMB Session Setup AndX Response
51 23.476956 192.168.100.146 192.168.100.102 TCP 49568 > microsoft-ds [ACK] Seq=568 Ack=406 Win=17115 Len=0
52 23.591795 192.168.100.146 192.168.100.102 SMB Session Setup AndX Request, User: DOMAIN\user
53 23.602934 192.168.100.102 192.168.100.146 SMB Session Setup AndX Response
54 23.603464 192.168.100.146 192.168.100.102 SMB NT Create AndX Request, Path: \desktop.ini
55 23.617925 192.168.100.102 192.168.100.146 SMB NT Create AndX Response, FID: 0x0000, Error: STATUS_OBJECT_NAME_NOT_FOUND
56 23.620749 192.168.100.146 192.168.100.102 SMB Session Setup AndX Request, User: DOMAIN\user
57 23.645069 192.168.100.102 192.168.100.146 SMB Session Setup AndX Response
58 23.645242 192.168.100.146 192.168.100.102 SMB NT Create AndX Request, FID: 0x12a6, Path: \
59 23.647636 192.168.100.102 192.168.100.146 SMB NT Create AndX Response, FID: 0x12a6
60 23.651410 192.168.100.146 192.168.100.102 SMB Session Setup AndX Request, User: DOMAIN\user
61 23.677782 192.168.100.102 192.168.100.146 SMB Session Setup AndX Response
62 23.845908 192.168.100.146 192.168.100.102 SMB Session Setup AndX Request, User: DOMAIN\user
63 23.855544 192.168.100.102 192.168.100.146 SMB Session Setup AndX Response
64 23.864421 192.168.100.146 192.168.100.102 SMB Session Setup AndX Request, User: DOMAIN\user
65 23.873746 192.168.100.102 192.168.100.146 SMB Session Setup AndX Response
66 23.876494 192.168.100.146 192.168.100.102 SMB Session Setup AndX Request, User: DOMAIN\user
67 23.891579 192.168.100.102 192.168.100.146 SMB Session Setup AndX Response
68 24.092971 192.168.100.146 192.168.100.102 TCP 49568 > microsoft-ds [ACK] Seq=1374 Ack=1128 Win=16393 Len=0