OK, I think now that there is more than one issue.

After reviewing the fact that older Windows PC's have great difficulties 
connecting to Vista shares, I thought then that it probably shouldn't be 
surprising that this is very difficult to impossible for the MS-DOS 
Network Client.

To test this idea, I slapped together a Win 98 machine, shared a folder, 
and found that the DOS client was able to connect and write to it just 
fine.  When I last worked with FreeDOS several years ago, I think I was 
able to connect to Win XP, but unless one of you is successfully 
connecting to Vista or newer, I am inclined to write that off as a can't do.

A separate issue: When DOS successfully connected to Win 98, "ipconfig 
c:\net" was still reporting that the lease was expired! And it did so 
whether I had configured DOS for DHCP or a static configuration.  And 
likewise, whether it was configured as static or DHCP, the DOS client 
could still connect to the W98 share.  The lease-expired status seems to 
be a bug.

Yet another separate issue: As I described earlier, when I set up for a 
static configuration, this is ignored.  I probably won't invest too much 
time into investigating, since I much prefer DHCP.

If I can't move files easily to/from the DOS client to a share on the 
Vista server, then I'll probably want to get wget and/or Arachne 
working.  But so far I just have NDIS drivers installed, and wget seems 
to require packet drivers.  I have a vague recollection that Arachne may 
also.  So I think this will be my next interest.

On 6/16/2015 9:48 AM, John Hupp wrote:
> Here's a reference, by the way, on the ipconfig usage that I mention 
> below: ftp://ftp.microsoft.com/misc1/BUSSYS/LANMAN/KB/Q183/8/58.TXT
> A couple more observations:
> When I booted up this morning, "ipconfig c:\net" once again reported 
> the lease expired, but the expiration time coincided exactly -- to the 
> minute -- with the bootup time, and the lease-issued time was exactly 
> 24 hours before I booted up this morning.
> Thinking to dodge the DHCP lease issue, I set up with a static IP 
> outside the DHCP address scope (but still within the same subnet 
> segment).  Nonetheless "ipconfig c:\net" still reports an IP within 
> the DHCP scope, rather than the static IP I assigned.
> Current functionality: I can successfully ping an IP address e.g. 
> "ping" but name resolution fails, so no-go on "ping google.com".
> On 6/15/2015 8:25 PM, John Hupp wrote:
>> I found out that ipconfig usage is not as expected for the DOS 
>> client.  "Ipconfig /all" is meaningless. In my case, the one and only 
>> good command is "ipconfig c:\net."
>> This then reports (now again under DHCP), an IP address, gateway, and 
>> DNS server as expected.  But it reports "Lease Expired."  Even after 
>> I forced the router to give it a brand new lease on a different IP, 
>> it still reports the lease expired. The router shows the lease as 
>> freshly issued with a day to live.
>> The date and time are correct on client and server.
>> Ideas?  (And no, "ipconfig /release" or "ipconfig /renew" won't work 
>> either.  They too are meaningless.)
>> On 6/15/2015 12:19 PM, John Hupp wrote:
>>> I just tried changing the DOS client from DHCP to static 
>>> configuration, and I still get the same net use error.
>>> Furthermore "ipconfig /all" still reports "No DHCP data available."  
>>> Shouldn't it report my static configuration info?
>>> On 6/15/2015 11:46 AM, John Hupp wrote:
>>>> Fundamentals -- you may be onto something.  Though TCP/IP 
>>>> initialization completes without error, running "ipconfig /all" 
>>>> yields "No DHCP data available." I get the same result from two 
>>>> identical cards, both configured the same way.
>>>> I do note that both cards are old non-PNP ISA cards, which I 
>>>> thought would be appropriate for this vintage rig.
>>>> In the meantime, in the Registry I changed 
>>>> HKLM\SYSTEM\CurrentControlSet\Control\Lsa\LMCompatibilityLevel=3 –> 
>>>> 0, which is "Send LM & NTLM responses" per 
>>>> https://technet.microsoft.com/en-us/library/jj852207%28v=ws.10%29.aspx. 
>>>> Then I rebooted.  But I still get the same error on the DOS client.
>>>> @ Roberto Fazzalari: I have been avoiding your approach to date 
>>>> since I never had more than a rank novice's acquaintance with 
>>>> Wireshark.  But it may be that I'll have to get reacquainted!
>>>> On 6/15/2015 12:09 AM, Louis Santillan wrote:
>>>>> Be sure that you have a good IP, gateway, and DNS setting from 
>>>>> your DHCP server.

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