dave
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| Re: Windows File Sharing: Facing The Mystery said by psloss  :Do you have a cite for this? I just tried this with Ethereal running (Win2000 to Win2000).
If I connect to a machine I have never connected to ever before, then I see a SYN to TCP/445 immediately followed by a SYN to TCP/139. Eventually, the second connection gets reset.
If I connect to a machine that I connect to often, then only the 445 connection is sent, so there's some memory in the system.
I imagine the odds are that 445 will be chosen, since (a) the 445 connection request is fractionally ahead of the 139 connection request on the wire, (b) smb-over-native involves one less layer than smb-over-nbt, so maybe the turnaround time is a little less.
(I didn't pay close attention to looking at how far the 445 connection setup had to proceed -- there are several SMBs needed for complete connection setup after the TCP connection is ready -- before the 139 connection was abandoned). |
