[Samba] samba problems after IP change

[Will Parsons]

I want to use samba to back up some directories on a QNX server to a
Windows office network drive.  (For those who may not be familiar with it,
QNX is a commercial OS similar to Unix.)  I am a samba newbie, but managed
to fumble my way through this, using cron on the QNX machine to run
smbclient command to copy a tar file to the Windows drive:

smbclient //swin0001/comq -U$userpass -WCNT \
          -c "cd phase3/cqarch; put $logfile; put $tarfile"

This worked, but after an office move, the IP addresses of the machines
changed (both are still on the same subnet), and the smbclient now fails.
I have reconfigured the QNX machine for the new address, and regular TCP/IP
(ping, ftp, telnet, &c.) between the machines works fine.  Running

smbclient -U% -L localhost

on the QNX machine shows expected shares.  The Workgroup name matches the
WinNT domain name.  Running

elm% smbclient //swin0001/comq -Uparsonw -WCNT

shows:

added interface ip=10.93.52.35 bcast=10.93.55.255 nmask=255.255.248.0
Connection to swin0001 failed

On the Windows side,

net view \\elm

(where elm is the name of the QNX machine) results in a message:

System error 53 has occurred
The network path was not found.

The QNX machine is no longer showing up in Network Neighborhood.

nbtstat -A 10.93.52.35

shows entries for ELM with a status Registered.

As far as I know, the only change to the network configuration was the new
IP subnet.  (I have direct control over the QNX machine, but the Windows
machines are managed by the IT department.)  Any thoughts on what broke or
how to fix it would be welcome.

- Will Parsons