I don't care what any of you say about "NOT" being able to uncap your upload limits! I for one have found a way to get 1.5Mb/sec from an initial download, and yes it has to do with the ARP tables. However, the speed doesn't stay that way.. the initial second or two is great but after that your back down on the ground level. There is one great thing about the way I've done it though and that is I am totally undetected from the @home network. Sure they can still see that they are losing bandwidth somewhere but they don't know where.
In order to do this you have to change your network properties so that you don't run DHCP. which also means you'll have a static IP.
Instead of automatically having an IP assigned to you find out your current ip. (run > winipcfg or ipcong depending on your windows os) and find out your current IP. then choose Use the following ip address add your ip to the table for the subnen mask add 255.255.255.0 and for the gateway use 10.10.10.0 choose a DNS like 62.108.1.66 and 62.108.1.65 and add those to the network properties table.
Now the only problem here is you have to find a program called FUCKUPC and run that.. (it also has a README file in there on exactly how to do this) it will automatically change your ARP table and then re-boot.
check your ip with winipcfg or ipconfig and walla.. you should be totally masked from shaw and you'll be totally uncaped (for a 2 sec duration of every upload) oh .. I almost forgot.. you have to find the MAC address of your cable modem and add that to the FUCKUPC program.
That's all I've found so far so I hope it helps some people.. BTW you might be able to find the program on hotline http://www.bigredh.com somewhere.. 
If I find out more I'll post it later.. 
Let the force be with you!

 
I don't really care that I'm capped, but I do know a little info about what Deuteronomy is talking about. This method is incredibly useful with a non-docsis modem, specifically in this case, with a LanCity cable modem. The only networks I have ever seen these work on is COX. If you buy this cable modem and attempt to connect to a network that doesn't allow non-docsis cable modems, well your SOL. AT&T caps everyone at the main office. So I think the idea behind having two exactly the same cable modems and getting higher on one then another is most likely not on the AT&t network, due to the fact that you have to register your MAC addy with the main office before it just allows you to connect to their network (or else everyone and their mom would be connecting illegally to the network). I have been reading down this, and I also noticed 'family'. What he said was probably the most accurate, ARP knows your MAC, and maps an IP to it. However I think he said that the MAC addy was Dynamic? It's very very static. Basically it doesn't change every time you get onto your computer. DHCP is Dynamic. Well to cut a long story short, you can't change you MAC addy, you can probably mask it, but for all the technically challenged, I'd say spoofing you MAC addy would be long and troublesome, and you should just deal with it. If you wanna stay legal, go buy a business license (for like 5 dollars) and subscribe for @work or something. Also if you live in CO (there are other places it hosts too, I just forget where :/)go here www.wideopenwest.com Best site since sliced bread. They are building their network now, so it might take like a year or two for some people. 

I have read every post here and all I can say is that all of you dont know what you are talking about. Let me Tell you how this works. On Reboot your cable modem gets a config file from the CMTS (Cable Modem Termination System) via TFTP. It is like ftp but with out the username and password. The file that is obtains is a binary file around 60k in size. For those who knows what SNMP does. It opens the "docsifcmtsqosprofilepermissions" table. There it updates the cable modem with the QOS's Max Upstream Bandwidth, Max Downstream Bandwidth, and my favorite Priority. I have never seen a Cable Isp set this above 0 (defalt). 7 is the max. Let me just say that when I want to download / upload somthing my subnet suffers  
All those values that I just talked about are Read-Create values. There for you can change it when you are not connected to the internet. Rember once you connect to the internet they update your cable modem with the new config. The rest you must figure out. 


 
regarding the previous post...you mentioned that your subnet suffers from your ups & downs...are you saying that you've managed to edit those values that you mentioned? Is there a way to make the modem call a modified config file from another location (preferably a linux box)?  
btw...regarding another previous post....the @work service isn't available in most areas and i'll bet money it's capped as well
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What the hell are the majority of you thinking??? I here constant references to arp this arp that I know this I know that...I've read over about 2 peoples posts that actually seem to know what there talking about. Check out foldoc.org for technical information regarding such things. And get educated. 

The speed limitation on a DOCSIS compliant cable modem is defined in the config file it gets when it is powered on. To "uncap" you have to have the cable company associate a different config file with the MAC address of your modem. Period. Read the DOCSIS spec. 

This thread has quite a bit of hostility. It's a shame differentiating false facts (99 percent of this thread) from partial truths (Milhouse, Doug, A Real Technician, etc...). 

Question:
I have heard rumors that it is possible to "uncap" cable modems, which results in your uploads and downloads being much faster than before. Is this true? 

Answer: 
No. For all DOCSIS systems, there is no way you can change any parameters. All parameters of the modem are controlled by SNMP from the CMTS and there is no way you can access that. Your only hope is to desolder the flash in your modem, reading it in a programmer, reverse engineering the whole program and then using your programming knowledge and DOCSIS knowledge in creating a firmware version that can trick the CMTS... Make sure the CMTS does not download a new image on you, make sure you detect it anyway so you can report the right version number when asked etc... When done, just solder the flash back in and you are ready! (the above piece contains a little sarchasm, and a lot of truth). 
 
Hi, Tell her to open up the Remedy, CAPS or BOS known as Scopes. I suggest use Scopes, on the left where it say QOS, set it up to unlimited. Once it done, you need to wait for 30 minutes and reset the modem three time, each time is 30 second long. After three time done, wait 30 minutes and uplug the coax cable for 45 minutes then it ok. From there if anyone from Comcast run any outages like USRM it will not change QOS. but if you don't reset the modem, then when whom ever run the USRM outages on your node, headend or RDC(Regional Data Center) then it will put it back to normal. 
Good luck. 
 
ok this message is to every dumbass that thinks its possible 
first of all, your speed depends completely on the cable network itself. theres nothing you can do to change it
when i got my cable, i started gettin 2mb/s down and 360 kb/s up
now all you motherfuckers who say they only get 15kb/sec upload instead of 128, YOU ARE FUCKIN RETARDS 
when they say you are capped at 128 KB/sec, it means KiloBits/second
Bits and Bytes are 2 different things
there are 8 Bits in 1 Byte, so when they say 128kb/sec, they mean 128kilobIts/sec, which in other words means 128/8 = 16kilobYtes/sec
so, my modem is capped at 250kilobYtes/sec down and 45kilobYtes/sec up 
now, whoever says that u can uncap using software, ITS BULLSHIT, cuz personally i didnt install any software from @home whatsoever, but im still capped
now if u think about it, cable modem is basically translator cable -> ethernet
i have 2 computers at home, they and the modem are connected by a hub. if it was software, the connection with my other system wouldve been capped too. 
now concerning taking apart your modem
unless u actually buy one for like $200-300, it is a property of @home, and when you return it, you will be charged with section 327 of the criminal code. if u dont believe me, read the sticker on your cable modem. 
so if u dont wanna reformat ur hdd for no reason or open up so u get get arrested, heres a suggestion 
GET A JOB AND GET A T1 

 
yes...uncapping is possible with fUPC if you have an old lancity cablemodem (the big black heavy sucker with the fins on it).
This utility spoofs the arp table. 
I havent found any way to uncap the newer cablemodems yet.. 
I was wondering if you can access the cablemodem IOS from the 10t port? or do you have to connect using the RF from another device?

 
i hear alot of people laughing at their cap being 500k 
if you download at 75kbps your cap is 512k
the forumula is cap / 7 i think 
anyway, for us SB4100 people their IS a way to "alter" our cappage and some great logfiles to understand how it works, in your web browser type in 
http://192.168.100.1 
this gives you your MAC addy, logfiles and stuff... 
shows you download a file periodicly from the "headend"
this sets your cap speeds.
mine is : Retrieved TFTP Config mota4100-silver.cm SUCCESS this is the 512/128 cap 
the lower 128/128 cap (or whatever its set at is:Retrieved TFTP Config mota4100-platinum.cm 
SUCCESS 

this suggests to me that the modem is "flashed" periodicly with a flash program of *.cm from the internet or "headend". 
the soloution would be : 
1 stop the hedend from flashing the modem
2 get your own *.cm to work (or figure out how to manually access the TFTP and get it to send you a different *.cm file.... fool your MAC addy? 
anyway beers kicking in  
 

**note this is for sb4100**
**note this is for sb4100**
**note this is for sb4100**
**note this is for sb4100** 
looking more into this, i have come close to solving this issue, i need help getting a paticular program to work. 
http://www.weird-solutions.com/_bin/bootpq.exe
is the program 
i need to understand this program to advance my study. 
this is 80% of solving the cap issue for me now 
fist things first. 
you need the MAC address off your modem get it off the back or from http://192.168.0.1/ 
need to put the mac address in the field within the QUERY program.... it should get to work takes a few mins then it shows you all the info. 
**those who help me will get the rest most important how to uncap it will not be public** 

all i need is: 
does someone get a reply?
do you get a reply using usb connection?
what operating system and routers? 
its VERY possible to uncap a modem im 100% sure. 
give me a hand here im close 






Obtaining Ethernet addresses? 
Scott Ehrlich se@panix.com 
Mon, 6 Nov 2000 16:10:30 -0500 (EST) 
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/proc/net/arp exists in the Linux community.  Plus, doesn't it only show
devices physically connected to the motherboard?  In my case, the Ethernet
address is on an external device which communicates with a device on the
MB.

Scott

On Mon, 6 Nov 2000, Niall Kavanagh wrote:

> # cat /proc/net/arp
> 
> ?
> 
> On Mon, 6 Nov 2000, Scott Ehrlich wrote:
> 
> > Hello Kris:
> > 
> > I am actually looking for a way to read/get the MAC address, not the IP.
> > Thanks though for what you did provide.
> > 
> > Scott
> > 
> > On Mon, 6 Nov 2000, Kris wrote:
> > 
> > > Well since i use to work for mediaone and know lots about cable modems...
> > > Also I am assuming you want the IP address(the MAC should be on the bottom
> > > of the modem).
> > > 
> > > First you have to MIB walk the headend.
> > > snmpwalk 10.l47.82.1 public |more
> > > (       replace x.147.82.1 with your IP gateway         )
> > > 
> > > You're looking for something like this:
> > > at.atTable.atEntry.atPhysAddress.1.1.10.147.83.13 =  Hex: 00 00 CA 07 FB
> > > 22 
> > > at.atTable.atEntry.atNetAddress.1.1.10.147.83.13 = IpAddress: 10.147.83.13
> > > Grep for your cable modem's MAC, there is an ARP entry in the headend
> > > for it's IP address as well(the MAC is on the bottom of the modem).
> > > Now you can MIB walk your cable modem or gather stats to your heart's
> > > content.
> > > Everytime you get renumbered though your modem will get renumbered too. 
> > > 
> > > If your doing this for the arp/bandwith uncap hack(first off it only works
> > > with LanCity type cable modems from mediaone), don't bother m1 has figured
> > > a way to block that(but I have a way to get around it as well e-mail me
> > > for info ;).
> > > 
> > > Thanx to Bill McDonough for some of this info
> > > 
> > > Kris Loranger
> > > Network Systems Engineer and Security Consultant
> > > Belenosinc.com
> > > kris@kancer.978.org
> > > IRC:undernet,#978,Kancer AIM:KancerKris
> > > Run Linux, keep the net free!
> > > 
> > > On Mon, 6 Nov 2000, Scott Ehrlich wrote:
> > > 
> > > > Hello to all:
> > > > 
> > > > I wish to remotely obtain the Ethernet address of my cable modem which is
> > > > attached to the Ethernet card of my OpenBSD box.  What utility is
> > > > recommended for this task?   I presume it will be some type of network
> > > > sniffer.
> > > > 
> > > > Thanks.
> > > > 
> > > > Scott
> > > > 

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