some basic questions

[arkantos]

hello!

i am new.

i don't know where else to ask my questions so i am asking them here.
i would be glad to get a few replies. this issue is driving me spare!

i originally had 2 ADSL modems and about 5 computers on a single 192.168.1.x network
i had kept DHCP enabled on one modem and disabled it on the other.

a few days ago i switched over to Cable Modem.
now i have 2 Scientific Atlanta Web-Star DPC2100R2 modems.

the first issue is that they are programmed in Bridged mode
other than getting a few SNMP replies on 192.168.100.1 and seeing a very rudimentary status page on 192.168.100.1:80 everything else is disabled.

the LAN IPs that the modems assign to my computers are very weird, they are not LAN series IPs at all.
202.137.208.x are assigned to my computers.
also both the modems are running DHCP so i cant specify a particular computer to hook on to a particular modem

the IPS of the LAN side of the modem also keep changing. (the IP specified as the default gateway on the computer)

the HFC?? (the cable people are calling it a node) is on my premises

i can use onestep, but only barely.
i also have very rudimentary skills in electronics (soldering is good, designing is zilch)


is it possible to disable DHCP on one or both the modems?
is it possible to specify a 192.168.1.x IP as the LAN side IP? i don't care what happens on the cable side of the modem.

please help!
thanks in advance,
Arkantos

[DJX]

First, if you want more control over your modems then you need to put Haxorware on them.
Then you be able to control just about every aspect of the devices.

The Motorola SB5101 is a lot easier to mod then the SA, but you still need a JTAG programmer.

Second, if your machines are getting a WAN based (routable) IP then you just need to get a NAT device.
Any BestBuy/Walmart "router" will give you NAT for your network.

As far as two modems go, you have to decide want you want to do with them.
If you want load balancing then you need to look for some sort of a dual WAN router.
Either way, if you want your machines to be NAT'd (192.168.x.x, 172.16.x.x, 10.x.x.x) then you need to pick up a router/gateway.

[arkantos]

First, if you want more control over your modems then you need to put Haxorware on them.
Then you be able to control just about every aspect of the devices.

of course. i have decided to put haxorware on them, but i want to know how. can you please point me to a page where the process is explained in more detail.
i have watched the 2 videos and they have cleared a lot of questions.
but a few still remain - can i ask them here?

The Motorola SB5101 is a lot easier to mod then the SA, but you still need a JTAG programmer.

i found these three products.
can you please tell me which will be appropriate?

http://robokits.co.in/shop/index.php?mai...cts_id=259
http://robokits.co.in/shop/index.php?mai...cts_id=240
http://cgi.ebay.in/ws/eBayISAPI.dll?View...0426160825


the cable company has a 5101 model from Motorolla (dont know wether its the SB5101 or not).
i can get them to replace my current modems, but i cant do it more times, only once.
is that what you would finally recommend?
or would you like me confirm the model number fully?

Second, if your machines are getting a WAN based (routable) IP then you just need to get a NAT device.
Any BestBuy/Walmart "router" will give you NAT for your network.

i was afraid of this.
ADSL modems generally house a router within them
is this the kind of router i have to install?
http://www.buy.com/retail/product.asp?sk...d=45819809
this is single wan, so i have to get 2 of these, right?

As far as two modems go, you have to decide want you want to do with them.
If you want load balancing then you need to look for some sort of a dual WAN router.
Either way, if you want your machines to be NAT'd (192.168.x.x, 172.16.x.x, 10.x.x.x) then you need to pick up a router/gateway.

i just dont want NAT and all. i only need the LAN side IP of the cable modem to be static and the DHCP to be disabled, so i dont have to get the routers and all.
then i can set the IP of the computers manually and i'll be set.


many thanks for patiently reading my tirade!

eagerly waiting for more replies.

[arkantos]

one more question.

i read about the Parallel to JTAG cable schematics here:
http://www.haxorware.com/forums/thread-24.html

and here, it says that it will take many hours for the flashing / copying process. - the paragraph just after the 3 links.
http://wiki.openwrt.org/oldwiki/openwrtd...jtag_cable

true?
if true, any alternatives?

thanks in advance!

[DJX]

For the JTAG, get one of these:
http://www.sbhacker.net/zencanada/index....4378b1140b
OR
http://www.usbjtag.com/zenshop/index.php...5e50cda75f

Para-JTAG is old, it takes a long-ass time to flash (I remember when I first got into CMs)
Get one of the ones I linked, they are USB based.

There is only one Motorola 5101 and that's the SB5101 (you can even pick these up in Walmart):
http://www.amazon.com/Motorola-Surfboard...358&sr=8-1

That cheap SMC router will work.
If you have two modems you either need a dual WAN router or two routers.

There is a limit as to how many WAN IPs a single modem will give out. It is called the "MaxCPE" (you can find it in the config).
Unless you have specifically bought static IPs from your ISP you must use DHCP from the ISP.

[arkantos]

i am sitting a long way away from you, my friend.
i cant buy either of the two jtag cables you recommended - i cant pay in dollars.

will this work??
http://robokits.co.in/shop/index.php?mai...cts_id=259
if you say that this wont work, i'll use the para-JTAG - i'll leave it to flash overnight

and thats the 5101 i saw.
i'll get hold of the cable company on monday to replace the two 2100 to 5101!


when i opened up the 2100, there were 2 connectors on the inside.
the 4*2 pin JTAG interface i can understand.
but there is also a 1*4 pin interface just beside it - whose wires are also going into the broadcom chip. what is that??

thanks!

[DJX]

I don't know if that JTAG programmer will work.
Maybe some one else can give some info on it.

If you can't spend $60 on a USB JTAG then the Para-JTAG is probaly what you want then.
It's pretty cheap to buy or even build if you have the equipment.
It will just take an hour or so to flash a modem.
I have both an old Para-JTAG and the USB JTAG NT and after using the USB JTAG, I'll probaly never use the Para-JTAG again.
Still nice to have as a backup I suppose...

I am not familure with the SA modems.
So, I can't give any info on them.

I can say that the SB5101 is very easy to flash, just plug in the pin header to the JTAG connector on the board and you're all set.

[drewmerc]

sa are the same as moto's they just use a different pin out on the jtag port one flashed they are the same (i myself prefer sa over moto)
it takes about an hour to flash an sa over parallel you can flash sa's quicker over telnet useing a tty cable (an old nokia dku5 cable works great)
and takes about 10 minutes (but if you fuck this up you need a jtag to recover it but if you follow the instructions you will be fine)