Is there a way to find an IP address from a MAC address?

[Gillbot]

I did the typical Google search for the subject and all their suggestions produced nothing.

What I am trying to do is access the management section of a switch I bought on ebay. It's a Telco Systems T5C switch model BTI-0530C-N. I got it for lan parties but i'd also like to mess with it to learn and such. When I try to access it via Hyperterminal, nothing happens. It asks for a password (which I don't have) but it seems as no matter what I do, it stops responding.

Any suggestions?

 

[OdiN]

Well...you need a password to login.

If it is managed you should be able to pull up the routing tables and whatnot to get your IP. Not sure if routing table is the right term for finding the IP/MAC in there.

 

[Gillbot]

I can't pull up anything using a cable. I was just thinking if I could get to the web admin page, it would be easier to try and guess the login info. (even if it took a very long time.)

 

[ssbpgsr]

"arp - a" will show you your current arp entries. If you don't ping or somehow access the mac address you won't be able to show the ip.

 

[spidey07]

see if you can reset it or reset the password, otherwise you won't be able to get into it.

its also doubtful it has a web interface.

 

[skyking]

use the serial interface and try These instructions.
It is doubtful that anyone changed from the default password.

 

[alent1234]

it's called something like reverse arp, forgot the exact name

someone asked me this on my last phone interview

 

[Gillbot]

I have the manual for it and I've tried the serial interface. It keeps locking up hyperterminal.

It DOES have a web interface that is accessed via the IP, but since I don't know the IP i can't get to it.

 

[Nothinman]

it's called something like reverse arp, forgot the exact name

Reverse ARP is a protocol generally used by netbootable firmware to find it's own IP information, you need a RARP server on your network and even then it works similar to DHCP in that it'll only reply with entries it's configured for.

 

[spidey07]

Originally posted by: Gillbot
I have the manual for it and I've tried the serial interface. It keeps locking up hyperterminal.

It DOES have a web interface that is accessed via the IP, but since I don't know the IP i can't get to it.

you need to get into the console to find the IP or else you could use a hub on the switch, attach a sniffer or PC running ethereal, start the paket capture and reset the switch. You may see the switch send out a gratitous arp for its own address. The source MAC will be that of the switch processor, sometimes this mac is printed on the switch somewhere.

if you're not getting anything through the console then you have the baud settings wrong or more likely an incorrect pin out on the serial cable. The manual should have the proper pinouts and baud settings - normally 9600/8N1

 

[Gillbot]

No, the console worksa and I can see it boot and everything, but after it asks for the password and I try to enter ANYTHING in, hyperterminal locks up.

 

[spidey07]

Originally posted by: Gillbot
No, the console worksa and I can see it boot and everything, but after it asks for the password and I try to enter ANYTHING in, hyperterminal locks up.

that mean's your pinout is probably wrong or speed/terminal settings. happens all the time.

try teraterm if you want, but you'll probably get the same thing.

 

[Gillbot]

I followed the pinout on the T5C manual. It only needed three wires connected.

RJ45 pin 2 to DB9 pin 3, RJ45 pin 3 to DB9 pin 2, and RJ45 pin 5 to DB9 pin 5. Other than that, since i'm not experienced with this I just don't know how it SHOULD react if at all to an incorrect password entry. Should it show or do something while I'm typing?

 

[spidey07]

normally your characters aren't echoed back to you.

but if you press return you should get another password attempt.

most times you can use a DB9/RJ45 serial adapter to your computer and then plug into the RJ45 port on the switch. From there you can try a straight through cable or the more common "rolled" cable (null modem)

 

[Gillbot]

if i hit enter at the password prompt, it did nothing. Just sat there.

 

[Goosemaster]

I looked at thier site an all they had was whitepapers..trying shooting them an email

 

[Gillbot]

I've emailed about 15 times and got zero response.

 

[Gillbot]

This is what I get through hyperterminal:
BATM Telco Boot Loader


Switch model : T5CN-L2

Loader version : 3.6.3 created Aug 4 2002 - 18:05:24

MAC Address : 00:A0:12:0A:02:03







Press any key to stop auto-boot...
5
4
3
2
1
0auto-booting...



Starting switch application, please wait......................................................

BUILT-IN SELF TEST

------------------

CPU Notify RAM Test : Passed

CPU Interface Test : Passed

Testing Switch Core : Passed

Data Buffer Test : Passed

////////////////////////////////////////////////////////////////////

// //

// //

// B A T M A d v a n c e d C o m m u n i c a t i o n s //

// //

// T e l c o S y s t e m s //

// //

// Switch model : T5CN-L2 //

// SW version : 3.8.1 created Aug 11 2002 - 17:01:38 //

// //

// //

////////////////////////////////////////////////////////////////////


#

##

###

####

#####

######

#######

########

#########

##########

###########

############

#############

##############

###############

User Access Verification


Password:

 

[Gillbot]

Well, I got the IP and as I suspected, the password has been changed from default.

The switch itself works fine so worst case is I'll have to use it as an unmanaged unit.

 

[spidey07]

Originally posted by: Gillbot
Well, I got the IP and as I suspected, the password has been changed from default.

The switch itself works fine so worst case is I'll have to use it as an unmanaged unit.

there should be password recover procedures. call them.

 

[Gillbot]

I just found the US branch contact info tonight. I'm gonna try to get in touch with them monday. Thanks!

 

[Relayer]

http://www.cirt.net/cgi-bin/passwd.pl

I don't see telco systems listed, but here is a nice list.

 

[Gillbot]

Sir,

We do not support a product that is purchased off of eBay.

If you need the switch reset to factory default, we recommend you send the unit in for repair.

Repair can contacted at repair@telco.com or 800-227-0937, option#2.

Regards,

Telco Systems Technical Support