2024 Comcast xfinity router ip address

27 Jun 2021 ... How do I change my WAN ip address that is provided by Comcast to my cable modem? ... router WAN interface as a static IP. Back ... XfinityJorge. + .... Kayra armstrong

They are reporting my IP address sometimes changes multiple times in 24 hours, which is causing VPN connectivity problems. Even though I probably have a dynamic IP address through Xfinity, they say more than 1 IP address change in 24 hours is unusual. I am reportedly the only person at the company that is happens to.Answer: ***Created by our Community Experts *** Some modems or gateways have the ability to be configured with multiple IPv4 addresses for each of their …IP Address 10.1.10.14 (This is the address assigned to it by the Comcast gateway) IP Subnet 255.255.255.0. Gateway IP 10.1.10.1 (This is the address assigned to it on the Comcast gateway) Domain Name 75.75.75.75. Domain Name 75.75.76.76. The IPv4 Setup screen on the gateway shows the following: IP Address 10.1.10.1.Jan 27, 2020 · IPv6 uses 128 bits to define an IP address. IPv4 uses only 32 bits. In both cases an IP address is partitioned into two parts; a network portion and a host portion. All bits are used and all bits are consecutive in a portion, i.e. you can not have a few network bits, then a few hosts bits followed by more network bits ,etc., etc. Hmm. Now that I think about it. It is a little strange that it's working now even after I power cycled everything like ten times. Maybe it was the modem trying to only use the ipv6 address, not realizing that it was connected to a router that only supports ipv4 and I just needed to power cycle the modem while it was connected to the router without …Just disable the Xfi Advanced Security feature for now as a workaround. It's buggy ! And there is currently no way for an end-user to whitelist anything; Windows 10/11. Press Windows and R key at the same time to open the Run box. Type CMD and press Enter. Type ipconfig/release in the Command Prompt window. Press the Enter key. Type ipconfig/renew. Press Enter. Type Exit and press Enter to close the window. @user_meh as a short term work around, I created DHCP reservations with in the router, you need to know the MAC or physical address of your device - if you log into the router, you'll see a list of connected devices, if you expand the list, you'll see it presents the ip address and (likely a 169.254.x.x address) an then an alpha numeric string of characters in pairs separated by a colon, this ...Open a web browser and enter your router’s gateway IP address, typically “192.168.0.1” or “10.0.0.1”. Check the router’s manual if these don’t work. Press Enter to …Next to your device in list select EDIT button. Under Edit Device. Configuration: ( ) DHCP. (*) Reserved IP. MAC Address: [xx:xx:xx:xx:xx:xx] Reserved IP Address: [10.0.0.x] You have to set the Reserved IP Address value the same as the value you set on the device itself. You may have to reboot the device for the change to go in …First, you must be directly connected via any Computer / Laptop via ethernet cable to any Lanport 1-4 of the Comcast Gateway. Then you should bring up a browser and in the address field just type in 10.1.10.1, then when the login screen appears use username = cusadmin/password = highspeed. If you are not using any Comcast Static IPs, then ...The public address the Comcast network assigns to your modem/gateway? The 'ipconfig/renew' option only 'renews' the existing address for another 24 hour …If it's a Comcast rental device, they do not provide a way to change the public IP address, and they won't change it for you, so you'd have to: swap out the gateway for another, or; place the gateway in bridge mode and connect a Wifi router, or; replace your rental gateway with customer-owned equipmentWith a computer, phone, or tablet that’s connected to your network, open a web browser and go to the Admin Tool at http://10.0.0.1 . If you’ve already changed your Admin Tool ID and password, log in with your information. Pro tip: This username and password aren’t the same as your WiFi name and password.If you’ve ever had to configure your home network or troubleshoot internet connectivity issues, chances are you’ve come across the IP address 192.168.0.1. This seemingly random com...I'm considering establishing a VPN for remote logins while away from home to various servers that I maintain on my home's LAN. One of the things I would need is either a stable (constant) home IP address that doesn't change frequently, or a router that supports DDNS (Dynamic Domain Name Server), wherein I would register a domain with …Also I put my old router back on and my old IP address came back. Verified with whatismyip.com I was hoping changing my router, and not my modem, would not change my wan IP. Question 2: Can you ping a non-static xfinity wan IP in cmd.exe? When I try to ping my friend's public IP (xfinity accout) and they try and ping my IP, we get no …Tap View WiFi equipment. Select your gateway. Select Gateway Details. You’ll see MAC address listed next to the CM MAC label. To find the MAC address of devices that have connected to your network: Go to WiFi. Select the device. Select Device details.The location of an IP address is usually found in your computer’s network diagnostics or Internet connection settings. Though this information is stored by your computer, it is ass...Overview of Xfinity Gateways. Xfinity Gateways and xFi Gateways are all-in-one devices that deliver internet and voice connectivity, whole-home WiFi coverage, network security, control and speed for the ultimate connected experience. General features of our latest devices, the xFi Advanced Gateways, include:Vote. Parkerbutler13. • 3 yr. ago. Plug something else into your modem, like a gaming console and power cycle the modem. It’ll get a new IP once it sees the new MAC address of whatever you connected. Then just plug your router back …This is a subnet of LAN IPs. Most routers will assign IP addresses to their own LAN between 192.168.1.0 and 192.168.1.255 (a separate subnet). In order for internet traffic to reach a device on the 192.168.1.0 subnet through the Comcast Gateway, that path must exist in the Gateway’s routing table.I grabbed the IP details with ip config/all on windows and applied that to my router WAN interface as a static IP. Back working now fine and location is CO as expected. No idea why or how Comcast assign DHCP IP but I tried two routers and got Boston IP, tried two laptops and got correct CO IP.IP Reputation attack. I have a Seagate Harddrive attched to my Xfi that contains music for my Sonos system also connected. Starting today I have recieved 35 threat messages that says Comcast has blocked malicious from China, Moldova and the US. All within the past 3 hours.3 years ago. Exactly, because 10.0.0.238 falls in your dhcp range, a static ip can't be assigned a IP in the your dhcp range, the way your dhcp is configured try a ip over 10.0.0.253, you might have to configure your dhcp server to use for example, 10.0.0.15 to 10.0.0.253, then you could assign a static ip anywhere between 10.0.0.2 and 10.0.0.14.Feb 12, 2022 · @user_meh as a short term work around, I created DHCP reservations with in the router, you need to know the MAC or physical address of your device - if you log into the router, you'll see a list of connected devices, if you expand the list, you'll see it presents the ip address and (likely a 169.254.x.x address) an then an alpha numeric string of characters in pairs separated by a colon, this ... IPv6 uses 128 bits to define an IP address. IPv4 uses only 32 bits. In both cases an IP address is partitioned into two parts; a network portion and a host portion. All bits are used and all bits are consecutive in a portion, i.e. you can not have a few network bits, then a few hosts bits followed by more network bits ,etc., etc.Step one: Inquiry. If you’re signing up for new services or moving, you can check online to see if Xfinity service is available at your address. If you can’t find your address online, please contact us. We’ll determine if service can be provided to your address. Sometimes, it may require further research for us to determine if we can ...If it's a Comcast rental device, they do not provide a way to change the public IP address, and they won't change it for you, so you'd have to: swap out the gateway for another, or; place the gateway in bridge mode and connect a Wifi router, or; replace your rental gateway with customer-owned equipmentAccess your Xfinity router’s admin tool by opening a browser and typing in your Router’s IP address. Input your username and password to log into the admin panel. On the side tab, locate the ‘Gateway’ tab and click on the ‘At a Glance’ option.I grabbed the IP details with ip config/all on windows and applied that to my router WAN interface as a static IP. Back working now fine and location is CO as expected. No idea why or how Comcast assign DHCP IP but I tried two routers and got Boston IP, tried two laptops and got correct CO IP. Open a new browser window, follow Steps one and two from above, and go to Connected Devices > Devices. Click the name of the device for which you want to add the port forwarding rule under Online Devices' Host Name. Highlight and copy the IP address. Return to the previous browser window and paste the IP address. I have a laptop and a PC on a Windows 10 home network via the ARRIS TG862G Router supplied to me by xfinity. My network is very unstable. One or the other of my computers will vanish from the network, sometimes for days or weeks at a time. A BBS friend has suggested that I try setting up static IP addresses for the laptop and PC.FWIW. You are talking about the public / WAN IP address that the Comcast DHCP server assigns to the routers and the combo gateway devices. They are talking about the private / LAN IP addresses that the routers and the gateway device's built-in DHCP servers assign to the individual home network clients..SIP Protocol, DPC 3941B. I went over to Comcast Business a few days ago to get a static IP address for my SIP server and am having problems: I am a developer producing an industry specific VoIP package. My old modem (DPC 3008) and router (TP Link WR1043-ND) did the job fine, but with temporary/internal IP address.Shut down all computers connected to the router. Power down / unplug the modem and the router. Allow them to sit for 60 seconds unplugged. Plug in the modem first and allow to completely boot up until the indicator light (s) on it show a steady connection (lit steadily). Plug in the router and let it fully boot up and sync with the modem.I grabbed the IP details with ip config/all on windows and applied that to my router WAN interface as a static IP. Back working now fine and location is CO as expected. No idea why or how Comcast assign DHCP IP but I tried two routers and got Boston IP, tried two laptops and got correct CO IP.In Internet networking, a logical address is an IP address that may be assigned by software in the server or router or may be user-assigned, in contrast to the physical address (al...They appear to be regionally distributed, so you'll want to look up the IP addresses and find the ones closest to you (wolframalpha is remarkably good at nailing that down). I'd thought that the time.comcast.net address might be the 'mothership', having 123 as the last octet, same as the NTP port, but not so.If one is behind a router or a combo modem / router gateway device, that will only serve to release and renew the private / LAN IP address that the router's built-in DHCP server assigns to the client, not the public / WAN IP address that the Comcast DHCP server assigns to the modem / connection.Here’s a step-by-step guide to help you: Connect your device to the same network as your Xfinity router. You can use a wired or wireless connection. Open a web …Learn how to find your blocked IP address - it's easy.Using a VPN connection with Xfinity Internet is just one of the many benefits for Comcast customers. All xFi Complete customers can enable Advanced Security on the go through the Xfinity app and benefit from safe browsing and data protection (Xfinity VPN). For more information, see the Advanced Security on the go FAQs.Hi there, we just had a router failure and comcast replaced our Cisco router with a Technicolor CGA4332COM.  Having some weirdness now. Our printer has …3 Jul 2023 ... How to change xfinity ip address? Allow me to introduce myself briefly, Hello, I am Delphi. I am at your disposal to help you with any ...Overview of Xfinity Gateways. Xfinity Gateways and xFi Gateways are all-in-one devices that deliver internet and voice connectivity, whole-home WiFi coverage, network …None of the Comcast modems provide any " A whitelist is a list or register of those that are being provided a particular privilege, service, mobility, access or recognition. ", facilities whatsoever. If you currently have a Comcast DPC3939B you can use the wireless MAC address filtering to handle only allowing particular wireless device NICs ...Many cable modems have a local IP address on the LAN. For example, 192.168.100.1 for an SB6121. This is for local management queries only. The modem is accessed from the Comcast by MAC address. and the local IP address is not visible on the Internet. The local CPE router is a separate functional block, with the WAN IP … Step 2. Directly connect your computer to the Comcast modem, click "Start," click "Run," type "CMD" into the Run window and wait for the command prompt to appear. Type "IPCONFIG" in the Run window and look at the IP address that is returned, as it will be the current IP of your Comcast modem. How to Login to a Comcast Modem. I haven't looked into paying for a static public IP address. If Comcast changes your public IP address a lot, you could use a Dynamic DNS solution like Dyn.com (dyndns.org) to keep your public domain name pointed at your public IP address even when your public IP address changes.Mar 4, 2022 · To change your external IP you need to swap out your Xb7 in the store or. Bridgemode your Xb7, connect your Xb7 to a router, configure router to show. up as PC MAC address instead of looking like a router so Xfinity doesn't deny your DHCP request, and then presto in about 10-20 minutes and maybe with just one power cycle of your main modem. Jan 2, 2021 · They bridge the public / WAN IP address (such 68.x.x.x) that is assigned by the Comcast system DHCP server to the device that is connected to the LAN side of the modem (such as a router or a computer). If you’ve ever had to configure your home network or troubleshoot internet connectivity issues, chances are you’ve come across the IP address 192.168.0.1. This seemingly random com...Select Gateway > Connection > WiFi. On the WiFi page, select ADD WIFI PROTECTED SETUP (WPS) CLIENT. Make sure WiFi Protected Setup is enabled. For Connections Options, select PIN Number. For Wireless Client's PIN, enter the PIN (created in Step 2) before the WiFi Protected Setup Utility finishes its countdown.Step-by-step Guide To Finding The Router’s IP Address. Every Xfinity Gateway Router has an IP address that allows you to access its admin panel and customize its settings. Follow these steps to find the router’s IP address: 1. Connect your computer or mobile device to your Xfinity Gateway Router either through Wi-Fi or an …Next to your device in list select EDIT button. Under Edit Device. Configuration: ( ) DHCP. (*) Reserved IP. MAC Address: [xx:xx:xx:xx:xx:xx] Reserved IP Address: [10.0.0.x] You have to set the Reserved IP Address value the same as the value you set on the device itself. You may have to reboot the device for the change to go in effect.Then, on the same device, open any web browser of your choice and open 10.0.0.1 as a URL which happens to be the Comcast Xfinity router’s IP address. After this, you will see the login page for Comcast Xfinity Router where you can see some basic details as well as the login option. Now, enter the correct username and password and click on Login.Dec 29, 2017 · With a computer, phone, or tablet that’s connected to your network, open a web browser and go to the Admin Tool at http://10.0.0.1 . If you’ve already changed your Admin Tool ID and password, log in with your information. Jun 22, 2021 · Most Xfinity routers have an IP address at the backside of the modem. The address is usually 10.0.0.1. When you key in this, it should land you on the login window. If the address does not go through, there are several others that you can try out. The reason why IP addresses may work is router-modem models vary. For example, there are standard ... Step 2. Directly connect your computer to the Comcast modem, click "Start," click "Run," type "CMD" into the Run window and wait for the command prompt to appear. Type …18 Apr 2020 ... Actually, I did some further looking and found that if I go to xfinity.com/myxfi and login View Network Details, select Gateway, go all the way ...Using a VPN connection with Xfinity Internet is just one of the many benefits for Comcast customers. All xFi Complete customers can enable Advanced Security on the go through the Xfinity app and benefit from safe browsing and data protection (Xfinity VPN). For more information, see the Advanced Security on the go FAQs.In the world of cybersecurity, staying one step ahead of potential threats is crucial. One important tool in the arsenal of cybersecurity professionals is IP address trace location...The admin panel of your router is a powerful tool that allows you to configure and customize various settings to enhance your network experience. One commonly used IP address to ac...I repeatedly run into the problem of temporarily blacklisted IP address when using Thunderbird via a Spectrum modem and router. ... Xfinity/Comcast has created this problem, and are unwilling to fix it. ... Today I started getting" Temporarily blacklisted IP Address" message for my Comcast email addresses. I have been using Mac mail …Support Internet. How to install and activate Xfinity Internet service for an xFi Gateway with the Xfinity App — Overview video. Check out a quick video that shows you how to set up, connect and activate your Xfinity Internet service — all in a few easy steps. Install your Xfinity Internet and/or Xfinity Voice.Once you log into the router, click Gateway > Connection and select WiFi. When you see your WiFi network name, click Edit and scroll down to the box that says Change Password. Type your new password into the field and save it. Change your SSID (the name of your network). Again, click Gateway > Connection > WiFi.5 Aug 2018 ... Change Xfinity/Comcast Router Settings! ALL ... Change Xfinity/Comcast Router Settings! ... How to change your IP address on ANY device to ANY ...Windows 10/11. Press Windows and R key at the same time to open the Run box. Type CMD and press Enter. Type ipconfig/release in the Command Prompt window. Press …1 Jan 2022 ... Xfinity official logo, Comcast ... Is there a way to update the Comcast router with the correct address/location? ... Would I give them my IP ...5 Aug 2018 ... Change Xfinity/Comcast Router Settings! ALL ... Change Xfinity/Comcast Router Settings! ... How to change your IP address on ANY device to ANY ...So to access the xfinity gateway administrator login page you need to go into a browser type in 10.x.x.1 (x can be replaced with whatever number was set as the ip) and normally a login screen to the modems admin settings SHOULD appear. For thr past week, however, i have been unable to access the login page. It just times out.Xfinity Gateway Router won't assign ip address to ethernet switch. Mine is a "simple" issue. My xFi modem stopped issuing DHCP addresses to my wired devices this afternoon and wireless throughput is in the dirt. I've restarted the modem from the xFinity online client and manually at least a dozen times, but the issues persist.Xfinity Wireless Gateway Admin Tool · This is the wireless gateway's administration site. · The default settings to open the Admin Tool are: Username: admin ... Connecting your Xfinity Home router. Plug the Ethernet cable into the yellow port on the back of the WNR1000 router. Plug the other end of the Ethernet cable into the internet modem or router. Plug the power supply cord into the round socket all the way to the right on the back of the router. Plug the other end into a working power outlet that ... If one is behind a router or a combo modem / router gateway device, that will only serve to release and renew the private / LAN IP address that the router's built-in DHCP server assigns to the client, not the public / WAN IP address that the Comcast DHCP server assigns to the modem / connection.The only option to to select the "X" next to the offline device, which brings up a pop-up menu that says "Are you sure you want to disconnect computer?". When I select "OK", I'm brought to the "Managed Devices" menu, which is now enable (previously disabled) and the device is added as a blocked device, which does nothing to remove the reserved ...If the Comcast DNS servers are unresponsive, try configuring on your local PC some 3rd pary external DNS servers like Googles 8.8.8.8 and try steps 4 and 5 again replacing 75.75.75.75 with 8.8.8.8. Now you should be able to use 3rd party DNS servers if you so choose because Comcasts "Broadband disclosure" states:26 Nov 2022 ... Comcast does not have static IP for residential services. So, if you have a Comcast residential service, then simply switching off and then ...@user_meh as a short term work around, I created DHCP reservations with in the router, you need to know the MAC or physical address of your device - if you log into the router, you'll see a list of connected devices, if you expand the list, you'll see it presents the ip address and (likely a 169.254.x.x address) an then an alpha numeric string of characters in pairs separated by a colon, this ...Login into Comcast modem/router. Go to the Firewall menu. Set the firewall level to "Custom Security", from there one of the options is to 'Disable entire firewall'. I wish it had more advanced features like allow me to create IP whitelist. But I am more than happy to use my own device to do that.Sometimes it can be hard to remember your WiFi network name (aka SSID) and password, so we made it easy to see and change them from a few places. Here’s how. Before you …None of the Comcast modems provide any " A whitelist is a list or register of those that are being provided a particular privilege, service, mobility, access or recognition. ", facilities whatsoever. If you currently have a Comcast DPC3939B you can use the wireless MAC address filtering to handle only allowing particular wireless device NICs ...Second IP needed - ARRIS - SURFboard S33 with Comcast 1200Mbps Service. Hi, A few days ago, I received notification from Comcast through e-mail stating that my current modem was not able to get advantage of the new 1200Mbps speed increase that has been enabled for customers on my current internet tear. So I went ahead and purchased the ARRIS ...According to: https://www.xfinity.com/support/articles/wireless-gateway-enable-disable-bridge-mode, if I've enabled bridge mode and I want to change it back, …I have a netgear wireless router attached to my Comcast cable modem. LAN subnet is 192.168. If I understand the manual correctly, if add static routes to each of these modems, then computers connected wirelessly to the routers can then speak to the computer attached directly to the cable modem, i.e., that 192.168.1.XXX addresses can …Mar 23, 2022 · FWIW. You are talking about the public / WAN IP address that the Comcast DHCP server assigns to the routers and the combo gateway devices. They are talking about the private / LAN IP addresses that the routers and the gateway device's built-in DHCP servers assign to the individual home network clients.. Finding Comcast’s IP address on Windows. Press the “ Win ” + “ r ” to open a run prompt. Type “ cmd ” into the input field and press enter to open a command prompt. Type “ ipconfig | findstr /i “Gateway ” into the command prompt and press Enter. Your default gateway will be on your screen.None of the Comcast modems provide any " A whitelist is a list or register of those that are being provided a particular privilege, service, mobility, access or recognition. ", facilities whatsoever. If you currently have a Comcast DPC3939B you can use the wireless MAC address filtering to handle only allowing particular wireless device NICs ...

Open a new browser window, follow Steps one and two from above, and go to Connected Devices > Devices. Click the name of the device for which you want to add the port forwarding rule under Online Devices' Host Name. Highlight and copy the IP address. Return to the previous browser window and paste the IP address. . Eggs up grill gastonia

Xfinity Community Forum. Internet. Your Home Network. Ip Address history. Ravigopal. New Poster ... You can't from Comcast. Maybe in your router's log entries. 0. 0 ...Exactly, because 10.0.0.238 falls in your dhcp range, a static ip can't be assigned a IP in the your dhcp range, the way your dhcp is configured try a ip over 10.0.0.253, you might have to configure your dhcp server to use for example, 10.0.0.15 to 10.0.0.253, then you could assign a static ip anywhere between 10.0.0.2 and 10.0.0.14. 0.Answer: ***Created by our Community Experts *** Some modems or gateways have the ability to be configured with multiple IPv4 addresses for each of their …Xfinity Wireless Gateway Admin Tool · This is the wireless gateway's administration site. · The default settings to open the Admin Tool are: Username: admin ...9. 3.2K views 6 months ago WiFi Router. Looking to access your Xfinity router settings using the 10.0.0.1 IP address? You're in the right place! In this short …Xfinity Wireless Gateway Admin Tool · This is the wireless gateway's administration site. · The default settings to open the Admin Tool are: Username: admin ...Apr 8, 2020 · I have tried a different router. I have replaced the cat 6 cable between the router and the modem. If I connect a laptop to the modem directly, I can get an IP address and get online without issue. If I connect a router (and I do power cycle the modem in between) it just doesn't seem to be able to connect to the DHCP server to get an IP address. I'm considering establishing a VPN for remote logins while away from home to various servers that I maintain on my home's LAN. One of the things I would need is either a stable (constant) home IP address that doesn't change frequently, or a router that supports DDNS (Dynamic Domain Name Server), wherein I would register a domain with …Although it is a less than optimal solution, I did a traceroute to 8.8.8.8 and picked the first IP address that responded. I verified that IP is in the Comcast address space. I set that IP address as the monitor address in my router. I have no idea where in physical space that address is.FWIW, and maybe to help provide a tad of clarity. The 169.254.xxx.xxx IP address is what is known as being a *self assigned* IP address. It's what happens when a device's operating system can not find a valid DHCP server for it to talk to / get assigned a valid IP address from. It comes from the printer itself, not the router / gateway device.Mar 23, 2022 · FWIW. You are talking about the public / WAN IP address that the Comcast DHCP server assigns to the routers and the combo gateway devices. They are talking about the private / LAN IP addresses that the routers and the gateway device's built-in DHCP servers assign to the individual home network clients.. For example, if the XB8 is using 10.0.0.1, your router should be set to something different, like 192.168.1.1- 192.168.1.253 otherwise you will run into an IP address conflict. To test bridge mode without your router involved, are you able to plug in your computer directly via Ethernet , power cycle the XB8, and see if you receive an IP address ...I have a static IP address from Comcast and I've set the leased Comcast router (CGA4131COM) to pass-through mode by disabling the DHCP server and setting a custom firewall setting (no firewall). I've set up my own multi-WAN router / firewall to sit between our local network and the internet. Everything works. Hooray.@EG The "advanced settings" aren't in the Xfinity app either. If I select More I get the following information: ADVANCED SETTINGS. Why am I no longer able to view/change some advanced settings? If you don't see the 2.4 and 5 GHz WiFi settings (WiFi Mode, Channel Selection, and Channel Mode) in Advanced Settings, this means …Why would a Comcast router (CGA4131 Business Gateway) that normally assigns a 10.1.10.x IPv4 address to PCs and devices suddenly start assigning 172.72.35.x IPv4 addresses? Yep - 172. This was unexpected and caused havoc with devices communicating with one another. Support Internet. How to view and change your WiFi network name and password. Sometimes it can be hard to remember your WiFi network name (aka SSID) and password, so we made it easy to see and change them from a few places. Here’s how. Before you begin, remember that: These instructions are for leased Xfinity Gateways only. Article | Comcast Business Support Using a VPN connection with Xfinity Internet is just one of the many benefits for Comcast customers. All xFi Complete customers can enable Advanced Security on the go through the Xfinity app and benefit from safe browsing and data protection (Xfinity VPN). For more information, see the Advanced Security on the go FAQs. Comcast does not offer static IP addresses for residential accounts. However, even though it's not static, it rarely changes. As many people have said, Comcast does not offer static IPs for residential service. The IPs are dynamic …Many cable modems have a local IP address on the LAN. For example, 192.168.100.1 for an SB6121. This is for local management queries only. The modem is accessed from the Comcast by MAC address. and the local IP address is not visible on the Internet. The local CPE router is a separate functional block, with the WAN IP ….

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