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SMCD3GNV Gateway default username and password not working to manage gateway

Posted by
New Poster

Message 1 of 42
59,536 Views

It seems after resetting the gateway to the default factory settings, the default username and password still does not work to manage the router.  Anyone have any ideas?

 

I am trying admin / password

 

Thanks for any help..

41 REPLIES
Posted by
Connection Expert

Message 2 of 42
59,532 Views

Are you using all lower case letters ? Are you holding in the recessed reset button on the rear for about 30 seconds ?




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Posted by
New Poster

Message 3 of 42
59,525 Views

Yes all lower case, Yes on holding the recessed reset button for 30 and even unplugged the gateway and while holding in the reset button plugged in the gateway and continued to hold reset button for 20 seconds.  Still no luck when going to 10.0.0.1 login screen...

Posted by
Problem Solver

Message 4 of 42
59,519 Views

So when you go to the 10.0.0.1 address, does it ask you for a username and password or is the screen blank or says it can't go to the address somehow?

 

Posted by
Problem Solver

Message 5 of 42
59,517 Views

I'm thinking maybe you have not correctly connected your computer (with an ethernet cable) to the SMCD3GNV gateway?

 

 

Posted by
New Poster

Message 6 of 42
59,516 Views

I get the xfinity Login screen..

 

Please login to manage your router.

 

Username:

Password:

Posted by
New Poster

Message 7 of 42
59,515 Views

Even though I get internet access, cable might not be connected correctly?

Posted by
Connection Expert

Message 8 of 42
59,511 Views

jumped in. He owns it now. Good luck with it !

 

Stepping on toes is not Kool dude....




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Posted by
Problem Solver

Message 9 of 42
59,497 Views

You get internet but can't connect to the SMCD3GNV, so the connection to the internet is through the SMCD3GNV right? 

 

What happens when you got to http://10.0.0.1 does it ask for the password?

Posted by
New Poster

Message 10 of 42
59,491 Views

Yes it asks for username and password..  I wish I could paste a screen shot to show..

 

Posted by
Problem Solver

Message 11 of 42
59,488 Views

Here is a thread, but nobody figured out how to connect to it

http://forums.comcast.com/t5/Home-Networking-Router-WiFi/Can-t-access-SMCD3GNV-via-10-0-0-1-or-via-h...

 

It seems they could not connect to it with either address.

Somebody thought that in bridge mode it doesn't respond to either address.

Is yours in bridge mode?  In bridge mode you do not use the wireless features and have a single ethernet to a diferent router.

 

How is yours set up as a wireless gateway or in bridge mode?

 

Do you have the computer directly connected to it?

Posted by
Problem Solver

Message 12 of 42
59,482 Views

http://forums.comcast.com/t5/Home-Networking-Router-WiFi/SMCD3GNV-Router-Bridged-Can-t-connect-to-th...  Paranoid says that in bridge mode it doesn't respond to any address, but in wireless gateway mode it responds to http://10.0.0.1

 

I you reset it for more than 15 seconds EG in some thread said it leaves bridge mode.

If you push the button  for 2 or 3 seconds it reboots without loosing bridge mode.

 

Seems like common reason for no access is it is in bridge mode.

 

If you want it in bridge mode leave it that way.

 

Posted by
New Poster

Message 13 of 42
59,467 Views

Computer is connecting to gateway via wireless. It's responding to 10.0.0.1 so I am thinking that it's not in bridge mode.  Guess this is one of those things that can't be solved.  I will see if they will switch out the gateway to see if that might solve the issue.  The gateway was not new, it came from another home since the gateway name was not the default when the tech installed it.  

 

Thanks for your help... 

Posted by
Problem Solver

Message 14 of 42
59,464 Views

Right if it is wireless, can you do ipconfig (on a pc) and give me the gateway address

 

 


C:\Documents and Settings\Administrator>ipconfig

Windows IP Configuration


Ethernet adapter Local Area Connection:

        Connection-specific DNS Suffix  . : localdomain
        IP Address. . . . . . . . . . . . : 10.211.55.4
        Subnet Mask . . . . . . . . . . . : 255.255.255.0
        Default Gateway . . . . . . . . . : 10.211.55.1

 

 

The default gateway should be the gateway device which is normally 10.0.0.1

If it is some other address try that address to contact the router.

 

Posted by
Problem Solver

Message 15 of 42
59,460 Views

Another thing is to make sure you are connected via wireless to the gateway as opposed to some other wireless.

 

If you have an ethernet you could plug it into the computer and the gateway and do a wired connection.

This would be more certain about what you are connected to.

 

Posted by
New Poster

Message 16 of 42
59,457 Views
Posted by
Problem Solver

Message 17 of 42
59,453 Views

So if you open a browser and do http://10.0.0.1  what exactly happens?

 

Can you ping 10.0.0.1 or telnet to 10.0.0.1

Posted by
New Poster

Message 18 of 42
59,444 Views

Can ping 10.0.0.1 but cannot telnet to 10.0.0.1

Posted by
New Poster

Message 19 of 42
59,443 Views

open browser, go to 10.0.0.1 and 

 

I get the xfinity Login screen..

 

Please login to manage your router.

 

Username:

Password:

Posted by
Problem Solver

Message 20 of 42
59,439 Views

So you login with username

admin

and Password

password

 

and does it say login incorrect?

or what happens.

Posted by
New Poster

Message 21 of 42
59,446 Views
Posted by
Problem Solver

Message 22 of 42
59,427 Views

So did you do what EG said and push the recessed reset button with a thin object for more that 15 seconds?

 

Reset Button (Recessed to protect against accidental reset)

Pressing the Reset button for varying lengths of time performs two types of reset operations.

Normal Reset – reboots the Wireless Gateway but retains current configuration settings. Use a thin object, press the Reset button for 2-5 seconds and release.

Factory Reset – deletes all changes made to the original configuration settings and restores the Wireless Gateway to the factory configuration.
Use a thin object, press and hold the Reset button for at least 15 seconds or more before releasing.

 

Posted by
New Poster

Message 23 of 42
59,376 Views

Yes that was tried but still no luck.  Going to call and see if they will switch it out.  Thanks for your help.

Posted by
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Message 24 of 42
59,340 Views

I just got a new SMCD3GNV today (2/7) and it also does not work with admin/password.  The tech did not know another password either.  I wonder if the new modems have a new login/pass?

Posted by
Problem Solver

Message 25 of 42
59,333 Views

Somewhere else on google for the SMCD3G (without NV) they said the password is

The default user ID is "cusadmin" and the default password is "highspeed".

 

 Try that and report back

Posted by
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Message 26 of 42
59,328 Views

I got hopeful, but that also does not work.  Incorrect password.

Posted by
Problem Solver

Message 27 of 42
59,325 Views

Did you try resetting the new box for 30 seconds with a pen.

They recycle boxes and this one may also have a different password.

 

So admin / password gives password incorrect also?

 

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Message 28 of 42
59,316 Views

Correct, I tried resetting.  Actually the Xfinity tech did as well and couldn't figure it out.  admin/password did not work.

Posted by
Problem Solver

Message 29 of 42
59,315 Views

So can we hook the computer with a plain ethernet cable to the SMCD3GNV also, just in case you can't login over wireless, which seems silly also.  I am getting sorry I ever tried to answer this question.

 

I guess looking at the forum or google are not working here.

 

Other devices but not this one have password with smcadmin in them

http://portforward.com/default_username_password/SMC.htm

 

Posted by
Networking Expert

Message 30 of 42
59,311 Views

At this point, if the modem cannot be successfully factory reset, it may be time to ask for a replacement.

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Posted by
Problem Solver

Message 31 of 42
59,300 Views

THis box is a replacement he got today, and it also doesn't log in or reset.

 

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Message 32 of 42
59,296 Views

Thanks for trying cjerian.  You are certainly not on the hook to resolve this, but I appreciate how you've tried to help so far.

 

Still no luck...

 

I tried via wired connection.

 

I tried every combination in that new list and even combined ones that were different.  

 

Thanks

Posted by
Networking Expert

Message 33 of 42
59,289 Views

And unless he is using two logins, it appears to be for a different user...

 

Codexier, if you are a different physical person that the originator of this thread, please start your own to avoid confusion.

 

Thanks...

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Posted by
Problem Solver

Message 34 of 42
59,285 Views

If I were replacing it I would get a modem, this one has voice so you may need voice,

If you need voice would get the plain arris 722g from trhe center and use a real wifi router which you would control

 

I like the dual link ones from netgear/buffalo etc.

http://www.amazon.com/s/ref=nb_sb_noss?url=search-alias%3Delectronics&field-keywords=dual+link+ac+ro...

 

real wifi routers work better than these anyway.

 

If you don't have voice you can just order a modem from amazon also.

routers like

 

You can buy one from the approved list also

http://mydeviceinfo.comcast.net/?s=i&so=1&e=0&d3=1&tier=-1&sc=570

Look for one that has 8 channel docsis 3,

avoid wireless gateway devices.

 

THis 6141 is 8 way and you can get it from amazon 

http://www.amazon.com/Motorola-SurfBoard-SB6141-DOCSIS-Cable/dp/B007IMPMW4/ref=sr_1_3?s=electronics&...

 

Posted by
Problem Solver

Message 35 of 42
59,282 Views

So 2 different people can't log into 2 different SMCD3GNV ?

 

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Message 36 of 42
59,264 Views

I apologize, I didn't mean to confuse everyone.  Yes, this is another person than the original poster.  I only added on because he just got a router yesterday and I got one today and neither one of us can login with the default password.  Wasn't sure if it was symptomatic.

 

I'll start my own thread, or more likely just see if you can help the other chap.

Posted by
Networking Expert

Message 37 of 42
59,256 Views

cjerian wrote:

So 2 different people can't log into 2 different SMCD3GNV ?

 


It appears that way...so either Comcast have changed the credentials thay are using on these devices when they send them out, or there is a coincidental failure of two of these devices...

 

I would still recommend the OP return his for an exchange. If the problem persists after that, there is either somethinggoing on at Comcast that we are not aware of, or an as yet unidentified user error.... 

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Posted by
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Message 38 of 42
59,172 Views

I had a similar problem.   Entered admin and password and nothing happened. 

I am not sure exactly how I got passed it but I did 2 things.   I deleted all the cookies and files from IE after I closed up all opened sessions of IE.   I tried again and made sure I clicked on the login button as opposed to pressing the enter key and it worked.  It could be a cookie management problem with the gateway code.  I am not impressed by the UI or the code running it. 

Posted by
Problem Solver

Message 39 of 42
59,148 Views

So maybe the login button works but pressing enter doesn't?

 

Does anyone else have a SMCD3GNV  to try it  out?

 

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Message 40 of 42
58,342 Views

I also have a SMCD3GNV and cannot login either.

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Message 41 of 42
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I tried cleaning all on the history ie and pressing the button and it did not work.

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Message 42 of 42
56,208 Views

This thread might be dead, but it helped me find a strange solution so I'll post it.

 

I was trying to login through chrome with different passwords and it didnt work. I then tried IE and it worked. After this login was successful, I was able to login from chrome anytime after.

 

The defaults I used:

username: cusadmin

password: highspeed

 

This password was cited a few times on Google searches and in an online manual (though not the version that comes with my device). Really strange that it needed IE. For what it's worth, I'm guessing that the "login attempt failed" messages are generic and apply to other things besides wrong username/passwords.