Resetting passwords om managed ?Netronix? switch.

  • Thread starter Thread starter j.m.nyberg
  • Start date Start date
J

j.m.nyberg

Hello.
I received a couple of rack mount 24 port ethernet switches that look
exactly like a Netronix 7326 model. There is no brand name on them,
but the MAC number refers to Netronix Inc. They seem to be configured
in a way that makes them unusable as normal LAN switches, and I have
not found a way to reset them except using one of the three management
interfaces; serial console, telnet and web, that is. But I do not have
the passwords. There is a reset button that only does a reboot,
however long I press it. I have tried Netronix support, but they have
not replied.
It seems a pity to throw them away, so I would be glad to have some
tips.

Johan Nyberg, Sweden
 
Hello.
I received a couple of rack mount 24 port ethernet switches that look
exactly like a Netronix 7326 model. There is no brand name on them,
but the MAC number refers to Netronix Inc. They seem to be configured
in a way that makes them unusable as normal LAN switches, and I have
not found a way to reset them except using one of the three management
interfaces; serial console, telnet and web, that is. But I do not have
the passwords. There is a reset button that only does a reboot,
however long I press it. I have tried Netronix support, but they have
not replied.
It seems a pity to throw them away, so I would be glad to have some
tips.

Johan Nyberg, Sweden
Click to expand...

http://www.netronixinc.com/datasheet/Ethernet/SNMP Managed Switch/DS-GS-7326.pdf

There is a 2MB flash chip inside. That might hold the custom settings.
Open up the unit, and check for any jumper functions.

Paul
 
Actually there are two socketed 1MB flash chips inside. I wonder if I
could replace them with new ones? There are no jumpers.

Johan
Click to expand...

If you had the firmware, yes you might be able to flash it
to the chips then swap them in, in place of the old ones.
If you have the firmware source code you might also look at
that.

They're not likely to only hold password and administrative
changed settings.
 
If you had the firmware, yes you might be able to flash it
to the chips then swap them in, in place of the old ones.
If you have the firmware source code you might also look at
that.

They're not likely to only hold password and administrative
changed settings.
Click to expand...

I have tried booting the switch with those two chips removed, and with
them reversed, while watching on a serial console. Nothing at all
happens, so I suppose you are right in believing that they hold at
least the firmware. I have firmware for the Eusso version of this
unit, at least I believe it is the same.
http://www.eusso.com/Models/Gigabit/UGS5224-RM/UGS5224-RM.htm The only
thing that differs is the colouring on the front. I have contacted
them and received a "master password", which did not work. I have
tried to upload this using tftp, but had no success. Otherwise I don't
know how I could flash the chips. I dont have any equipment for doing
it outside the unit. I have not tried removing just one of the chips,
yet.
 
I have tried booting the switch with those two chips removed, and with
them reversed, while watching on a serial console. Nothing at all
happens, so I suppose you are right in believing that they hold at
least the firmware. I have firmware for the Eusso version of this
unit, at least I believe it is the same.
http://www.eusso.com/Models/Gigabit/UGS5224-RM/UGS5224-RM.htm The only
thing that differs is the colouring on the front. I have contacted
them and received a "master password", which did not work. I have
tried to upload this using tftp, but had no success. Otherwise I don't
know how I could flash the chips. I dont have any equipment for doing
it outside the unit. I have not tried removing just one of the chips,
yet.
Click to expand...


It would seem like a very bad design if there were not some
way to reset the defaults. Hopefully asking them again
about this and a procedure to use the reset button might be
fruitful. I don't suppose there's a battery in it? Did you
find any jumpers?
 
It would seem like a very bad design if there were not some
way to reset the defaults. Hopefully asking them again
about this and a procedure to use the reset button might be
fruitful. I don't suppose there's a battery in it? Did you
find any jumpers?
Click to expand...

Well, very bad or very safe. I suppose it depends. No jumpers, no
battery. There are soldering pads for a JTAG interface, I think.
Though as yet I do not know anything about JTAG. Maybe I will have to
learn.
 
Well, very bad or very safe. I suppose it depends.
Click to expand...

I doubt that it depends, typically companies don't care much
at all about "very safe" relative to RMA costs. It is more
likely they intended the reset button to work resetting the
passwords, since there is no internal jumper. I still
wonder if the proper procedure to get this done has been
overlooked and feel you have been given very poor support by
the manufacturer.


No jumpers, no
battery. There are soldering pads for a JTAG interface, I think.
Though as yet I do not know anything about JTAG. Maybe I will have to
learn.
Click to expand...

You should not have to mess around with a JTAG interface for
this... but I suppose it's something to play around with if
you can't get any other resolution.
 
I doubt that it depends, typically companies don't care much
at all about "very safe" relative to RMA costs. It is more
likely they intended the reset button to work resetting the
passwords, since there is no internal jumper. I still
wonder if the proper procedure to get this done has been
overlooked and feel you have been given very poor support by
the manufacturer.


You should not have to mess around with a JTAG interface for
this... but I suppose it's something to play around with if
you can't get any other resolution.
Click to expand...

Well, I haven't tried pushing the reset button with the left
forefinger of an unborn babe at a crossroads on the vernal equinox.
I'll have to wait a bit for that. I missed the winter solstice too.:-)
As to support from the manufacturer, I agree it is less than what I
hoped for. Maybe it's in the pipeline.
 
Johan Nyberg said:
Well, I haven't tried pushing the reset button with the left
forefinger of an unborn babe at a crossroads on the vernal equinox.
I'll have to wait a bit for that. I missed the winter solstice too.:-)
As to support from the manufacturer, I agree it is less than what I
hoped for. Maybe it's in the pipeline.
Click to expand...

While not this exact brand, I have run into some systems that use the reset
button all by itself as nothing more than a hardware reset. To default the
software and passwords to factory default I had to continuously press a
front panel button "while" pressing the reset button, and all with in the
first 3 to 5 seconds from power up. Which front panel button was needed
varied depending on the firmware loaded in the problem box.
 
While not this exact brand, I have run into some systems that use the reset
button all by itself as nothing more than a hardware reset. To default the
software and passwords to factory default I had to continuously press a
front panel button "while" pressing the reset button, and all with in the
first 3 to 5 seconds from power up. Which front panel button was needed
varied depending on the firmware loaded in the problem box.
Click to expand...

Sorry, no other buttons than the reset, which is of the push-with-a-
straightened-paper-clip kind.
 
Johan Nyberg said:
Sorry, no other buttons than the reset, which is of the push-with-a-
straightened-paper-clip kind.
Click to expand...

I'm sure you've already tried this but did you power the unit on while
holding in the reset button? That too is used by some manufacturers as a
means of using a single reset button for two purposes. One for hardware
reset and the other sequence to default the device to factory settings.
 
Well, I haven't tried pushing the reset button with the left
forefinger of an unborn babe at a crossroads on the vernal equinox.
Click to expand...

LOL, fair enough, but what would be the point of a reset
button if it doesn't reset? I still think there's a way to
get this done but the info from manufacturer is lacking.

I'll have to wait a bit for that. I missed the winter solstice too.:-)
As to support from the manufacturer, I agree it is less than what I
hoped for. Maybe it's in the pipeline.
Click to expand...

Email them again, and again. Sometimes persistence pays
off. Other times it's harder for them to ignore you if you
call.
 
I'm sure you've already tried this but did you power the unit on while
holding in the reset button? That too is used by some manufacturers as a
means of using a single reset button for two purposes. One for hardware
reset and the other sequence to default the device to factory settings.
Click to expand...


That's what I also thought might've been missed... failing
any other buttons or jumpers or battery. I suppose there's
always the hope it was a simple password and a pasword
cracker could be tried.
 
That's what I also thought might've been missed... failing
any other buttons or jumpers or battery.  I suppose there's
always the hope it was a simple password and a pasword
cracker could be tried.
Click to expand...

I have tried to try password cracking, though I have no previous
experience. I used hydra on the telnet interface, with some files of
logins and passwords. I never got further than a false positive. I
know this can be tuned, but I do have other things in my life. At
least my wife thinks so;-)
And yes, I have tried powering up with the reset button pushed.
 
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