LAN network, two identical, unchangeable static IPs

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Adam_110

Commendable
Apr 26, 2016
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Hello everyone,
I have two identical devices with the same static IP which, short of sending them in to the manufacturer, can not have their static IPs changed, in addition the IPs are identical, which is causing issues.

I am using the Billion 7800nx router for connecting my devices.

Four devices specifically,
1 Laptop -Wireless, dynamic ip
2 Generic control system - LAN - dynamic ip
3 Measurement and data logger #1 - LAN - Static IP stuck at 192.168.0.12
4 Measurement and data logger #2 - LAN - Static IP stuck at 192.168.0.12

I need to occasionally access the data loggers by FTP to download their csv data files. Currently the only reliable way for me to do that is to directly connect to the individual data logger, which is a pain or to issue a command to have one of the loggers turn off, which will then give me a short window to connect to the other device.

Thankfully this isn't a high priority issue, but I have not been able to find any information on any techniques to attempt to be able to access both devices despite their IP conflict. Just trying to get a feeling for if their is any potential solutions to investigate further out there.
 
Solution
Ralston18
Thanks - very interesting.

As I understand it, with so much on the line (i.e., PhD data) I would opt for simplicity and just stay with your present "command" technique.

Agree it is a nuisance but hopefully you will not need to deal with the problem forever and it does seem a bit trivial (no offense intended) with respect to the greater scheme of things you are probably dealing with.

Even if a technological solution is/was found I would hesitate to even implement it - who really knows what may happen? Especially with older devices and operating systems. Very sure you do not need more "variables".

Sort of falls into that "if it ain't broke - don't fix it" category.
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Ralston18

Ralston18

Titan
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Oct 11, 2014
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I would be very surprised to find a network device (such as the described data loggers) that does not permit changing the static IP....(?)

Who manufactures the data loggers? Make and model? I would certainly give the company a call......

There should be some accessibility via a device webpage, login name, and password. Or a reset button to change the data logger to the default/factory settings....

Please post the make and mode of the data loggers. Perhaps someone will recognize the device(s) and provide additional suggestions.
 
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Adam_110

Commendable
Apr 26, 2016
2
0
1,510
Hi Ralston,
Sure. The device is called a con::stat-sf I use them to monitor dissolved sulfide concentrations for my phd. It is an older model ~10 years old, made by a company called S-scan. In Australia, the devices are serviced by a third party, who are very helpful and can likely change the IP of the device for free no less, but in my experience their turn around time is prohibitive for my project. I will not be given the access privileges to change the IP myself. (Oh and of course, another option would be to open a ticket with university IT)

The system operates with a control and display program called ana::lyte which, in my units, are built upon windows-nt. I do not have access to the windows-nt environment. Still, a review of documentation for the units indicates, that yes, static IP should be changeable in most models but in my specific units, because netsh command is not possible, the IP is not alterable, at least at my level of access permission.

As I said before it is not a high priority job, it would save me less than an hour per week at most, but sending it in to the third party would cost my project several weeks. So on procrastination days, I kill some time by looking for a simple'ish method to let me remotely connect to both units simultaneously. My google-fu hit a wall, and now I figured I would ask around to see if anyone had some suggested reading material that might point me in the right direction.
 
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McHenryB

McHenryB

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Jan 31, 2015
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That's because what you are asking is clearly impossible. The only way round it would be to run the FTP server on one of the devices on a non-standard port. If you can't even configure the IP address I would guess that your chances of changing the port used are zero.
 
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Ralston18

Ralston18

Titan
Moderator
Oct 11, 2014
34,816
3,309
146,290
Thanks - very interesting.

As I understand it, with so much on the line (i.e., PhD data) I would opt for simplicity and just stay with your present "command" technique.

Agree it is a nuisance but hopefully you will not need to deal with the problem forever and it does seem a bit trivial (no offense intended) with respect to the greater scheme of things you are probably dealing with.

Even if a technological solution is/was found I would hesitate to even implement it - who really knows what may happen? Especially with older devices and operating systems. Very sure you do not need more "variables".

Sort of falls into that "if it ain't broke - don't fix it" category.
 
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