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Xfinity/Comcast router


 

?Last week we started internet service(not TV) with Xfinity. We picked up the router from their office. My husband talked to tech support in another country. They set the wifi password. My husband hasnt been able to change the password. He called them back. They said they cant reset it. Our question is; should we try to return the router and get another one if we have no control over the password.

Device type XB3
cisco mod:DPC3941T
Encryption WPA WPA2
Manufactured date 6-2016


 



Pat

On Dec 31, 2024, at 6:13 AM, marji pomposini via groups.io <Msp.gml@...> wrote:

Last week we started internet service(not TV) with Xfinity. We picked up the router from their office. My husband talked to tech support in another country. They set the wifi password. My husband hasnt been able to change the password. He called them back. They said they cant reset it. Our question is; should we try to return the router and get another one if we have no control over the password.

Device type XB3
cisco mod:DPC3941T
Encryption WPA WPA2
Manufactured date 6-2016




 

Thanks, Pat!
We're working on it now.
Happy New Year to all!

Marji

On Dec 31, 2024, at 9:57?AM, Pat Taylor via groups.io <pat412@...> wrote:

?

Pat

On Dec 31, 2024, at 6:13 AM, marji pomposini via groups.io <Msp.gml@...> wrote:

Last week we started internet service(not TV) with Xfinity. We picked up the router from their office. My husband talked to tech support in another country. They set the wifi password. My husband hasnt been able to change the password. He called them back. They said they cant reset it. Our question is; should we try to return the router and get another one if we have no control over the password.

Device type XB3
cisco mod:DPC3941T
Encryption WPA WPA2
Manufactured date 6-2016








 

Our internet was off for several months at our condo. When we got here I determined the router was bad. Took it into the Xfinity store for a replacement Tried to get the new one to work but no go. Had a tech come out to see what was wrong. He said there were some wiring issues that he fixed and told me the brand new router was no good. He replaced it and all is well. The only problem I had was it didn’t want to connect to my Nest thermostat. We finally figured out he had put the password that I wanted in wrong. 4 numbers and 1 of the four was wrong. :-)

Dutch

On Dec 31, 2024, at 10:38?AM, marji pomposini via groups.io <Msp.gml@...> wrote:

Thanks, Pat!
We're working on it now.
Happy New Year to all!

Marji

On Dec 31, 2024, at 9:57?AM, Pat Taylor via groups.io <pat412@...> wrote:

?

Pat

On Dec 31, 2024, at 6:13 AM, marji pomposini via groups.io <Msp.gml@...> wrote:

Last week we started internet service(not TV) with Xfinity. We picked up the router from their office. My husband talked to tech support in another country. They set the wifi password. My husband hasnt been able to change the password. He called them back. They said they cant reset it. Our question is; should we try to return the router and get another one if we have no control over the password.

Device type XB3
cisco mod:DPC3941T
Encryption WPA WPA2
Manufactured date 6-2016











 

Hi Pat,

If you're not getting anywhere, try logging into the XB3 _directly_, i.e., the modem/router/DHCP server box they gave you.

Most likely you are on the 192.168.0.xxx or the 192.168.1.xxx IP range and therefore normally try just typing in either one of these IP addresses to at least get to the router management page to sign in using your browser. Just type in or copy/paste these IP addresses into the browser URL field and hit enter. You'll either get a 404- not found, or if you're lucky you'll get to the login page. Try the following:

192.168.0.1
or
192.168.1.1

One of these might bring up a login window. Now you need to know the login name and password for the router, which has nothing to do with your WiFi password. Typically if no one has changed the login/PW try something like the following login name and PW's:

admin
admin

admin
cusadmin

If all this works you can now "manage" your router yourself. Just be extremely careful not to make _any_ changes that you are not certain about.
Look for the WiFi tab or link which should take you to a page(s) where you can set up, among other things, your WiFi PW. Go to the WiFi SSID name and the WiFi PW fields and enter what you want the WiFi name to be called and the password that you want. Take a screenshot or write all this down. Then click on the "save" button. Normally at this point the router will do a full reboot, which may take a minute or so. Let the router go through all the normal bootup until you see the "Internet" LED flashing which means the router has connected to your ISP successfully to establish an Internet connection. I have a Comcast Business (It's actually a Cisco Technicolor) router and it takes almost a minute to totally stabilize.

Now, if everything above worked, on your WiFi devices look for the (new if you changed it) WiFi name, select it, and now enter the exact new PW (case sensitive). It should authenticate, and you're in. In addition, your devices will probably now remember the login and PW for all future connections.

This is the simplistic scenario, and with a little luck should work, however, there are many other factors I'll save for another day that may be involved.

Le me know if you get anywhere with the above suggestions.

All the best,
John


 

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On Dec 31, 2024, at 11:05?AM, John via groups.io <OceanCity@...> wrote:
Hi Pat,
If you're not getting anywhere, try logging into the XB3 ?_directly_, i.e., the modem/router/DHCP server box they gave you.

Hi again Pat,

Sorry, I forgot to suggest you do all this on a laptop or a desktop that's plugged in directly to one of the Ethernet ports on your XB3 modem/router.

Cheers,
John?


 

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Pat,

I did a little basic digging and came up with two good links you can research from:

?
It would appear the default login for your router are as follows:

IP address to enter in your desktop or laptop browser: 192.168.0.1
Default Username: admin
Default Password: ?password

Also, here's more of a product description that might contain some hints for your router:
?

This is all really basic stuff so regardless of the techs are telling you, unless they permanently "burned-in" the settings you should be able to.

Let us know how you are getting anywhere.?

Cheers,
John ?


 

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Hi John,
That was me, Marji who first posted about Xfinity.
I passed all the posts on to my husband who is working on all the info everyone sent.
I'll post about our "endeavor" as we find out more.
Thanks.
Marji

On Dec 31, 2024, at 11:25?AM, John via groups.io <OceanCity@...> wrote:

?Pat,

I did a little basic digging and came up with two good links you can research from:

?
It would appear the default login for your router are as follows:

IP address to enter in your desktop or laptop browser: 192.168.0.1
Default Username: admin
Default Password: ?password

Also, here's more of a product description that might contain some hints for your router:
?

This is all really basic stuff so regardless of the techs are telling you, unless they permanently "burned-in" the settings you should be able to.

Let us know how you are getting anywhere.?

Cheers,
John ?


 

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My Xfinity router IP ?is 10.0.0.1 ? User name admin and password password which they immediately want you to change which I did

I’m fairly familiar with the settings ? No need to change anything but fun to poke around?

Dutch

On Dec 31, 2024, at 11:25?AM, John via groups.io <OceanCity@...> wrote:

Pat,

I did a little basic digging and came up with two good links you can research from:

?
It would appear the default login for your router are as follows:

IP address to enter in your desktop or laptop browser: 192.168.0.1
Default Username: admin
Default Password: ?password

Also, here's more of a product description that might contain some hints for your router:
?

This is all really basic stuff so regardless of the techs are telling you, unless they permanently "burned-in" the settings you should be able to.

Let us know how you are getting anywhere.?

Cheers,
John ?


 

The last time I got a new router and modem from spectrum it had the password written right on there or should I say engraved on the side one of the devices,and I don’t think there’s any way to change that password. I suppose it’s possible if I call them up and say I want to change the password they might do it but personally I just I’m happy that I can still remember the password and I haven’t had any problems keeping the one I have. I’m really not sure why companies do this. It used to be I could put in my we anwe are at own password or change it whenever; then they stopped doing that.
Ellen

Sent from my iphone max pro 15

On Dec 31, 2024, at 10:38?AM, marji pomposini via groups.io <Msp.gml@...> wrote:

?Thanks, Pat!
We're working on it now.
Happy New Year to all!

Marji

On Dec 31, 2024, at 9:57?AM, Pat Taylor via groups.io <pat412@...> wrote:

?

Pat

On Dec 31, 2024, at 6:13 AM, marji pomposini via groups.io <Msp.gml@...> wrote:
Last week we started internet service(not TV) with Xfinity. We picked up the router from their office. My husband talked to tech support in another country. They set the wifi password. My husband hasnt been able to change the password. He called them back. They said they cant reset it. Our question is; should we try to return the router and get another one if we have no control over the password.

Device type XB3
cisco mod:DPC3941T
Encryption WPA WPA2
Manufactured date 6-2016











 

You can change it. Rather that use admin and password as the defaults on all gateways or modems. They put the sticker on the unit so the user can find it.

This is so hackers can’t have access, since so many users don’t change the default.

With my current use of Comcast, each of the 4 gateways have all had that sticker, each was different, and they were all years old and refurbished.

Brent

On my iPhone Xr

On Jan 1, 2025, at 19:39, Ellen Lerner via groups.io <iomug@...> wrote:

?The last time I got a new router and modem from spectrum it had the password written right on there or should I say engraved on the side one of the devices,and I don’t think there’s any way to change that password. I suppose it’s possible if I call them up and say I want to change the password they might do it but personally I just I’m happy that I can still remember the password and I haven’t had any problems keeping the one I have. I’m really not sure why companies do this. It used to be I could put in my we anwe are at own password or change it whenever; then they stopped doing that.
Ellen

Sent from my iphone max pro 15



On Dec 31, 2024, at 10:38?AM, marji pomposini via groups.io <Msp.gml@...> wrote:

?Thanks, Pat!
We're working on it now.
Happy New Year to all!

Marji

On Dec 31, 2024, at 9:57?AM, Pat Taylor via groups.io <pat412@...> wrote:
?

Pat

On Dec 31, 2024, at 6:13 AM, marji pomposini via groups.io <Msp.gml@...> wrote:
Last week we started internet service(not TV) with Xfinity. We picked up the router from their office. My husband talked to tech support in another country. They set the wifi password. My husband hasnt been able to change the password. He called them back. They said they cant reset it. Our question is; should we try to return the router and get another one if we have no control over the password.

Device type XB3
cisco mod:DPC3941T
Encryption WPA WPA2
Manufactured date 6-2016















 

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That’s a 24-bit block with up to 16 million addresses. Was that set by default?

Otto

On 31 Dec 2024, at 19:36, Dutch Junge via <dutch@...> wrote:

My Xfinity router IP ?is 10.0.0.1 ? User name admin and password password which they immediately want you to change which I did

I’m fairly familiar with the settings ? No need to change anything but fun to poke around


 

On 1/2/25 3:41 AM, Otto Nikolaus via groups.io wrote:
That’s [10.0.0.1] a 24-bit block with up to 16 million addresses. Was that set by default?
10.0.0.0/8 is one of the RFC 1918 non-routable blocks, and an address in that range (usually 10.0.0.1) is often used by default for the LAN side of things like gateway modems and routers. On the internet side, it will have a routable IP address, but, except for very special circumstances, you don't want the admin interface accessible via that address.

Brian


 

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On Jan 2, 2025, at 12:11?PM, Brian L. Matthews via groups.io <blmatthews@...> wrote:
On 1/2/25 3:41 AM, Otto Nikolaus via??wrote:
That’s [10.0.0.1] a 24-bit block with up to 16 million addresses. Was that set by default?
10.0.0.0/8 is one of the RFC 1918 non-routable blocks, and an address in that range (usually 10.0.0.1) is often used by default for the LAN side of things like gateway modems and routers. On the internet side, it will have a routable IP address, but, except for very special circumstances, you don't want the admin interface accessible via that address.
Brian

Hi Brian,

You obviously know your way around the block (no pun intended) and I'm gathering you are very experienced and credibly knowledgeable based on your concise explanation. I can walk around my block, but I couldn't tell you how, LOL.?

I've seen the 10.0.0.1 address often, but less than the more common default 192.169.0.xxx or 1.xxx shipped with consumer equipment. Is there any particular reason a manufacturer would choose the former over the latter??

All the best,
John?


 

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In my experience, 10.0.0.1 is a common router address for Comcast Business accounts.

On Jan 2, 2025, at 12:16, John via groups.io <OceanCity@...> wrote:

?On Jan 2, 2025, at 12:11?PM, Brian L. Matthews via groups.io <blmatthews@...> wrote:
On 1/2/25 3:41 AM, Otto Nikolaus via??wrote:
That’s [10.0.0.1] a 24-bit block with up to 16 million addresses. Was that set by default?
10.0.0.0/8 is one of the RFC 1918 non-routable blocks, and an address in that range (usually 10.0.0.1) is often used by default for the LAN side of things like gateway modems and routers. On the internet side, it will have a routable IP address, but, except for very special circumstances, you don't want the admin interface accessible via that address.
Brian

Hi Brian,

You obviously know your way around the block (no pun intended) and I'm gathering you are very experienced and credibly knowledgeable based on your concise explanation. I can walk around my block, but I couldn't tell you how, LOL.?

I've seen the 10.0.0.1 address often, but less than the more common default 192.169.0.xxx or 1.xxx shipped with consumer equipment. Is there any particular reason a manufacturer would choose the former over the latter??

All the best,
John?


 

On Jan 2, 2025, at 3:18?PM, Ben Rosenthal via groups.io <ben@...> wrote:
In my experience, 10.0.0.1 is a common router address for Comcast Business accounts.
Okay, but _why_ is this?
Is it simply because it has 16 million available IP addresses?

Cheers,
John


 

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On 1/2/25 12:16 PM, John via groups.io wrote:
On Jan 2, 2025, at 12:11?PM, Brian L. Matthews via groups.io <blmatthews@...> wrote:
On 1/2/25 3:41 AM, Otto Nikolaus via??wrote:
That’s [10.0.0.1] a 24-bit block with up to 16 million addresses. Was that set by default?
10.0.0.0/8 is one of the RFC 1918 non-routable blocks, and an address in that range (usually 10.0.0.1) is often used by default for the LAN side of things like gateway modems and routers. On the internet side, it will have a routable IP address, but, except for very special circumstances, you don't want the admin interface accessible via that address.
Brian

I've seen the 10.0.0.1 address often, but less than the more common default 192.169.0.xxx or 1.xxx shipped with consumer equipment. Is there any particular reason a manufacturer would choose the former over the latter?

Not any big reason that I know of. As you say, it is the biggest of the three non-routable blocks (2^24 or ~16m addresses, 172.16.0.0/12 has 2^20 or ~1m addresses, and 192.168.0.0/16 has 2^16 or ~64k addresses (actually some of the addresses in each block are broadcast addresses, so not quite that many, but close enough)), and it's the easiest to remember (any IPv4 IP address starting with 10. isn't routable), but I don't think any reason other than those.

Note that it's 192.168.*, not 192.169.*, which is a regular routable address block, and 1.* is also a regular routable block (for example one of Cloudflare's DNS servers is at 1.1.1.1).

Brian