Xfinity ipv6 - Aug 2, 2020 · I am having issues setting up my static IPv6 Address from my Comcast Cable Modem. If I bypass the USG and connect directly to the Comcast Cable Modem, IPv6 works correctly. I also have my static IPv4 address working correctly on the USG. I reviewed the following Instructions:

 
JKnott @lenhuppe. Jun 12, 2021, 6:38 PM. @lenhuppe said in Enabling IPv6 on Comcast home network: The "DHCPv6 Prefix Delegation size" defaults to 64 on the WAN side and the "IPv6 Prefix ID" defaults to 0 on the LAN side. The proper value depends on what prefix size they provide.. Chilis stonecrest

Go to Interfaces > LAN. 6. Select Track Interface in the IPv6 Configuration type. 7. Select the Track Interface (WAN) and leave the Prefix ID set at 0. 8. Save and Apply the Changes. 9. Go to Firewall > Rules and create a new rule by clicking the + button to make a rule for the WAN interface.Follow these steps to configure Windows 10 network settings on your computer. Right-click on Start. Select the Network Connections option. Double-click on the network connection you are using. Click Properties (you must be logged in as Administrator, or you will be prompted to log in). Click the Networking tab. Today, Comcast’s Xfinity Internet native IPv6 deployment has grown to become the world’s largest IPv6 deployment, as measured by the Internet Society’s World IPv6 Launch Measurements. The Internet Society (ISOC) measures deployment using several data sources, including data from Google, Facebook, Yahoo, and Akamai. Test your connection fast with Xfinity's internet speed test tool and get tips on how to improve your internet performance.Provide IPv6 to your LAN including the clients behind it. For step 1 start with selecting the appropriate IPv6 mode, reconfigure the WAN interface and try to ping an IPv6 address or host from the firewall itself, e.g.: Test if ping over IPv6 to Internet is successful (also possible via Interfaces‣Diagnostics‣Ping ).This week at the North American Network Operators Group’s 46th meeting (NANOG46) Comcast demonstrated end-to-end IPv6 readiness on its network. Comcast is testing and trialing IPv6 by proactively checking the readiness of our software, hardware and systems. In some cases we’re replacing or upgrading equipment to ensure the transition is ...Any info on how to setup IPv6 with comcast/xfinity? Connection type ative, passthrough, etc? What about settings for DNS? Thanks. Keenan. Senior Member. Feb …Welcome to the Xfinity community! Our community is your official source on Reddit for help with Xfinity services. If you have questions about your services, we're here to answer them. We can help with technical issues, general service questions, upgrades & downgrades, new accounts & transfers, disconnect requests, credit requests and more.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'm reaching out for some advice on setting up IPv6 with my Comcast Xfinity router. I've noticed that we're assigned a /56 IPv6 prefix in the Xfinity settings. However, Xfinity seems to restrict us to a /64 prefix for DHCPv6 or SLAAC. Our goal is to utilize our own DHCPv6 server and distribute the full /56 block into multiple /64 subnets.Google WiFi can’t see ipv6 addresses or prefix. Some ipv6 addresses passthrough to devices but devices can talk to the world only using IPv4. Not sure if it’s google WiFi glitch or way Comcast now manages ipv6 assignment and google WiFi doesn’t support it. I had it for 2 years and remember until recently having no issues with ipv6.New customer and new service. Got everything activated and the Xfinity app tells me everything is working fine. Websites like Google and YouTube load along with the videos on those sites but it seems I have no connection to anything that uses ipv4, my computer reads that there is no IPv4 connection but the connection to ipv6 is working as …Add a port forward · Isn't connected to your home network. · Is using an IPv6 address. · Has a static IP set in the Gateway Admin Page.Today, over 25% (and growing) of Comcast’s Xfinity Internet customers are actively provisioned with native dual stack broadband Internet service. Native IPv6 …The message delivered was "No IPv6 detected. You appear to have no IPv6 at this time." When I review the setup for IPv6 on my TP-Link AC1750 router, it shows a connection type of DHCPv6, an IPv6 address, a default gateway, and IPv6 DNS address. Is IPv6 in use on my PC? Am I setup correctly? Why does the Comcast test disagree with … Welcome to the Xfinity community! Our community is your official source on Reddit for help with Xfinity services. If you have questions about your services, we're here to answer them. We can help with technical issues, general service questions, upgrades & downgrades, new accounts & transfers, disconnect requests, credit requests and more. When we begin our support for home gateway devices late this year, we initially plan to use a default IPv6 prefix allocation that is a /64 in length, providing over …To create a Comcast email account, individuals must be XFINITY Internet subscribers. Each Comcast account can have six usernames and emails attached, and users can be managed from ...user_daw312. No, IPv6 is not functional until it is reset, the test just shows the issue. Just a guess, there is an issue getting a new IP address when the lease expires - some interaction issue between the netgear router and comcast. This issue has been reported on these forums, reddit, on netgear forums, DSL reports, and probably more, for a ...We knew it was coming, but on Tuesday, FCC Chairman Ajit Pai announced his plan to gut net neutrality and hand over control of the internet to service providers like Comcast, AT&T...What IPv6 configuration does Comcast currently offer if you are using a single static IPv4 address, or a dynamic IPv4 address. Currently, I do have a static IPv4 /29 (5 IP addresses), and I am gett...You will need to take your cable mode out of bridge/passthrough mode, and your "router" behind the modem has to do DHCPv6-PD and send a "hint". If your "router" doesn't support dhcpv6-pd functionality, you'll need to connect devices directly to the cable modem to have functional ipv6. If it does have dhcpv6-pd functionality and you have an …I am having issues setting up my static IPv6 Address from my Comcast Cable Modem. If I bypass the USG and connect directly to the Comcast Cable Modem, IPv6 works correctly. I also have my static IPv4 address working correctly on the USG. I reviewed the following Instructions:This week at the North American Network Operators Group’s 46th meeting (NANOG46) Comcast demonstrated end-to-end IPv6 readiness on its network. Comcast is testing and trialing IPv6 by proactively checking the readiness of our software, hardware and systems. In some cases we’re replacing or upgrading equipment to ensure the transition …Dec 14, 2023 ... If you have to setup a dhcpv6 server inside, use a /64 prefix. Set an arbitrary range -- something like ::1000 to ::2000. I use ravd to provide ...I am afraid that I must disagree. I set this up - had it working and getting a 10/10 from the COMCAST IPv6 test page and 19/20 from here: IPv6 test - IPv6/4 connectivity and speed test (ipv6-test.com) I would test it every day for more than a week. Then one day I ran the tests again. I got 4/10 from COMCAST page and 13/20 from the other.6rd. comcast. home. ipv6. router. This is an example configuration for connecting to the Comcast 6RD trial tunnels from a typical residential NAT/DHCP home router. NOTE: Comcast has listed an end date of 6/30/2011 for their 6RD trial. The 6RD gateway may not be accessible after that.Comcast (or rather the DOCIS spec allows a value to be configured on a modem) only allows 1 MAC address to get DHCP lease, if you connected something like a laptop to configure bridge mode or for testing purposes you need to reboot the modem to clear the stored MAC address.To halt unauthorized IPv6 traffic in your network, you also need to halt unauthorized IPv6 tunnels hiding in IPv4 traffic. There are many forms of tunnels you might want to control including Teredo, ISATAP, 6to4, 6in4, 6over4. Even GRE 6in4 tunnels might be a concern. In fact, every IPv4 network should also control IPv4 traffic tunneling in ...Sep 24, 2019 · The Comcast IPv6 DNS servers will be prepended regardless of any other setting, static or dynamic. Additionally, all IPv6 DNS lookups are "intercepted" by Comcast and redirected to their IPv6 DNS servers. IPv6 cannot be disabled overall - even if devices have their IPv6 "turned off", the router will forward v4 to v6 and insert itself in the mix. So, you MUST TURN OFF ALL DHCP SERVERS ON THE COMCAST ROUTER both the IPv4 and IPv6 DHCP Stateful server. if the Comcast router is IP addresss 10.0.10.1 then the Essentials server should be 10.0.10.2. When the Essentials server aks if it's the primary DNS server say YES. When it asks if it's the DHCP server …Since you're wanting to disable it for your internal network, it might be an option to do so via the individual operating systems, although I would definitely recommend researching the device and operating system to evaluate the impact it would have if you decide to go that route. 0. 0.The issue is that once ipv6 is turns on the modem will stop forwarding all traffic (IPv4 and IPv6). It will stay in this state until the modem is rebooted, however post reboot traffic will drop again after about 2 minutes. If I turn off IPv6, IPv4 will work exactly as you would expect. This problem started after buying a MB8611 and still ...What IPv6 configuration does Comcast currently offer if you are using a single static IPv4 address, or a dynamic IPv4 address. Currently, I do have a static IPv4 /29 (5 IP addresses), and I am gett...To halt unauthorized IPv6 traffic in your network, you also need to halt unauthorized IPv6 tunnels hiding in IPv4 traffic. There are many forms of tunnels you might want to control including Teredo, ISATAP, 6to4, 6in4, 6over4. Even GRE 6in4 tunnels might be a concern. In fact, every IPv4 network should also control IPv4 traffic tunneling in ...Disabling IPV6 temporarily. I am trying to connect my smart home device (Litter Robot) to my WiFi. The device can only access 2.4 GHZ connections and IPv4 router. I am currently using the Dual Band XB3 Gateway which has the 5 GHZ AND 2.4 GHZ connections. The only problem I have is that I can't disable the IPv6 to allow my device …On an almost daily basis I am getting IPv6 INPUT drop, IPv6 FORWARD drop, and WANATTACK drop in my router's firewall log and losing my network connection. Likely happening when using Microsoft Teams and Zoom for meetings using computer video and audio. Seen this same problem all over these forums and have yet to see a resolution.Click "Sign In" if necessary. • Click the "Peer to peer chat" icon. • Click the "New message" (pencil and paper) icon. • Type "Xfinity Support" in the "To:" line and select "Xfinity Support" from the drop-down list which appears. The "Xfinity Support" graphic replaces the "To:" line. • Type your message in the text area near the bottom ...Feb 3, 2023 · For the most part, modems don't care about IPv4/IPv6. It's the router that needs to support it. I used to have a Zoom 5341J, and IPv6 worked on it. Comcast does use IP to access the modem for checking and updates and configuration. That may be v4 or v6, depending on the model, but is not relevant to the end user. 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 power cycling the router (like you suggested). ... It seems xfinity gateway doesn’t assign IPv4 sometimes and my WiFi ...Double-check the firewall settings in the modem. At least for my modem, the IPv6 firewall was set to "Typical" by default, which blocks inbound connections. Select "Custom" and disable the firewall (your modem may be different) 0. 0. Cancel. In the office we get the IPv6 address by dhcpv6From this address, we have Internet connectivity, but ...My Motorola MB8600 has a IPv6 address (according to the GUI), but no IPv4 IP address. My edgerouter x has had the same configuration for a long time, and nothing has changed. The edgerouter x has a preflix-length of /56 which allowed it to work in the past with no problems. All my devices are not reciving IPv6 IP addresses, and IPv6 …2. Go to Advanced > IPv6. 3. Enable IPv6. 4. Select Dynamic IP (SLAAC/DHCPv6). 5. Go to Advanced settings, Select Auto in “Get IPv6 Address”. Select Enable in “Prefix Delegation”.Greetings all, After racking my brain for the past few weeks as to WHY my speed dropped from 800-900 to 500-600. I even went out and got a new Modem (Arris S33). I found out that my AX-86U (on Merlin 388.1), had IPV6 enabled. I turned it off and it's working correctly. (Getting 1000-1200Mbps from spdMerlin at the router).Firmware version after the Comcast update is V2.01.02 and I'm including the event log and connection status below. The CM1100 is plugged into our firewall (Untangle v14.1.1) with IPv6 config set to Auto (SLAAC/RA). It's pulling a class A IPv4 address (73.x.x.x/23) without issue, but IPv6 is completely blank.Apr 12, 2012 · In a somewhat controversial move, Comcast is giving each of its home networking users what’s called a /64 block of IPv6 addresses, which represents more than 18 quintillion IPv6 addresses or ... Welcome to the Xfinity community! Our community is your official source on Reddit for help with Xfinity services. If you have questions about your services, we're here to answer them. We can help with technical issues, …Dec 24, 2017 ... The Solution: · Plug an IPv6 capable computer (must be turned on in your network settings) straight into your cable modem. · Open PowerShell and ...Oct 1, 2021 · My setup is Modem: MB8611 Router: Netgear Orbi RBR20 I set the Orbi's IPv6 setting to Auto Config, rebooted it as well as my modem, but no IPv6 address is detected at https://test-ipv6.com... As you may know, Xfinity recently graded it's network speed to 2.5gbs. That change obsoleted my Motorola MB8600 cable modem, and altered my IPv6 subnet mask from a /64 to a subnet mask of /128, assigning a single external ip address. The MB8600 was quickly replaced with a 2.5gbs capable Motorola MB8611. I had a career in IT; senior …Any info on how to setup IPv6 with comcast/xfinity? Connection type ative, passthrough, etc? What about settings for DNS? Thanks. Keenan. Senior Member. Feb …O Xfinity, como a maioria dos provedores de serviços de Internet, usa endereços IPv4 e IPv6. IPv4 é o protocolo mais antigo e mais utilizado, com um espaço …Jun 30, 2020 · IPV6 - Prefix Delegation Size. Hello, I'm setting up IPV6 for my home network and by default, Comcast is assigning a 64-bit prefix delegation size, which allows only 1 subnet. I have multiple subnets at home and I want to add support for IPV6. According to the last post to this thread, it stated that Comcast no longer accepts hint for /60 prefixes. Xfinity Network upgrade / DHCPv6 change. A couple of months ago I received a notice that Xfinity was upgrading its network in my area with a middle of the night disruption. Next day, my IPv6 stopped working. I tracked it down to a change in the way DHCPv6 server worked. It seems the address of the DHCPv6 server moved from a …In a somewhat controversial move, Comcast is giving each of its home networking users what’s called a /64 block of IPv6 addresses, which represents more than 18 quintillion IPv6 addresses or ...Nov 28, 2016 ... Next you have to configure ipv6 for all your networks. Go to Networks. open LAN (edit) and select the IPv6 interface type. Click save and your ...Mar 19, 2020 · The message delivered was "No IPv6 detected. You appear to have no IPv6 at this time." When I review the setup for IPv6 on my TP-Link AC1750 router, it shows a connection type of DHCPv6, an IPv6 address, a default gateway, and IPv6 DNS address. Is IPv6 in use on my PC? Am I setup correctly? Why does the Comcast test disagree with the TP-Link setup? Feb 22, 2020 · Thanks. " NATIVE " along with all other default settings will permit you to setup/test IPv6 on comcast/xfinity. The additional recommendations above may come in handy, depending upon your needs. I don't recall needing to reboot, but you may need to afterwards to show your IPv6 address on the firmware page. Sep 24, 2019 · The Comcast IPv6 DNS servers will be prepended regardless of any other setting, static or dynamic. Additionally, all IPv6 DNS lookups are "intercepted" by Comcast and redirected to their IPv6 DNS servers. IPv6 cannot be disabled overall - even if devices have their IPv6 "turned off", the router will forward v4 to v6 and insert itself in the mix. Since you're wanting to disable it for your internal network, it might be an option to do so via the individual operating systems, although I would definitely recommend researching the device and operating system to evaluate the impact it would have if you decide to go that route. 0. 0.Click "Sign In" if necessary. • Click the "Peer to peer chat" icon. • Click the "New message" (pencil and paper) icon. • Type "Xfinity Support" in the "To:" line and select "Xfinity Support" from the drop-down list which appears. The "Xfinity Support" graphic replaces the "To:" line. • Type your message in the text area near the bottom ...I am having issues setting up my static IPv6 Address from my Comcast Cable Modem. If I bypass the USG and connect directly to the Comcast Cable Modem, IPv6 works correctly. I also have my static IPv4 address working correctly on the USG. I reviewed the following Instructions:fr. es. IPv6 8 July 2013. Comcast Now Enabling Users To Easily Find Out IPv6 Status In Their Area. By Dan York Director, Internet Technology. UPDATE – 6 April 2020 – In the seven years since this post was first written, Comcast has migrated their entire network over to IPv6.It seems fairly common sense, but cable internet providers such as Comcast and Charter do not openly advertise that you can use most any compatible DOCSIS 3.0 gateway and avoid pay...Let's test the speed to your device. We'll measure the speed from our servers to this device. Results are often lower than plan speeds due to WiFi conditions and device capabilities. …You can find the gateway, static, and CIDR block using these instructions: View your Static IP information online . If you have any further questions or concerns please reach out through private message with your first and last name, business service address and account number or phone number and we would be more than happy to assist. 0. 0 ...In a somewhat controversial move, Comcast is giving each of its home networking users what’s called a /64 block of IPv6 addresses, which represents more than 18 quintillion IPv6 addresses or ...On further inspection, I am actually losing IPv6 connectivity every hour (not every two hours). Rebooting the modem restores IPv6 connectivity for an hour and then the modem stops routing traffic again. So my theory about the problem being related to 2 hour WAN DHCP leases may be incorrect. (Renewing a lease should not break connectivity but ...I have a similar problem. We're using a Peplink Balance router, a dual-WAN router that NAT-balances the office traffic between Comcast and AT&T (for IPv4 only).It also bridges IPv6 to the Comcast modem. The Balance router is also a proxy DNS server, and one if its functions is to substitute lookups for local hosts on the LAN to their local …IPv6 is certainly supported on Comcast/Xfinity on the UDM. I have a score of 19/20 on IPv6 test. Configure as below and then reboot the UDM. You should have a 128/ under 2001: and your LAN should have a /64 under 2601:.6rd. comcast. home. ipv6. router. This is an example configuration for connecting to the Comcast 6RD trial tunnels from a typical residential NAT/DHCP home router. NOTE: Comcast has listed an end date of 6/30/2011 for their 6RD trial. The 6RD gateway may not be accessible after that.Add a port forward · Isn't connected to your home network. · Is using an IPv6 address. · Has a static IP set in the Gateway Admin Page.Are you looking to get the most out of your Comcast package? With so many channels available, it can be hard to know which ones are worth your time. Fortunately, there are a few ke...Welcome to the Xfinity community! Our community is your official source on Reddit for help with Xfinity services. If you have questions about your services, we're here to answer them. We can help with technical issues, general service questions, upgrades & downgrades, new accounts & transfers, disconnect requests, credit requests and more.If you have to setup a dhcpv6 server inside, use a /64 prefix. Set an arbitrary range -- something like ::1000 to ::2000. I use ravd to provide DNS servers I specify, but depending on how yours works, you make have to enter some IPV6 DNS servers to pass out someplace else. Hope that's a start. ( edited) 0.IPv6. IPv6 stands for the Internet Protocol, version 6. It is a protocol that’s intended to replace the current version, IPv4. One of the main benefits of IPv6 versus IPv4 is that it provides a pool of nearly unlimited IP addresses. Other improvements include more efficient routing and stateless address auto-configuration.IPv6-test.com is a free service that checks your IPv6 and IPv4 connectivity and speed. Diagnose connection problems, discover which address(es) you are currently using to browse the Internet, and what is your browser's protocol of …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 power cycling the router (like you suggested). ... It seems xfinity gateway doesn’t assign IPv4 sometimes and my WiFi ...Comcast Activates First Users With IPv6 Native Dual Stack Over DOCSIS. We are excited to announce that Comcast has successfully activated our first group of cable modem customers using IPv6 in a "Native Dual Stack" configuration. These customers can now access content and services natively over both IPv6 and IPv4, since …Test your IPv6 connectivity. Your IPv4 address on the public Internet appears to be 40.77.191.126. Your Internet Service Provider (ISP) appears to be MICROSOFT-CORP-MSN-AS-BLOCK. No IPv6 address detected [more info] You appear to be able to browse the IPv4 Internet only. You will not be able to reach IPv6-only sites. To ensure the best Internet ...Dec 14, 2023 · If you have to setup a dhcpv6 server inside, use a /64 prefix. Set an arbitrary range -- something like ::1000 to ::2000. I use ravd to provide DNS servers I specify, but depending on how yours works, you make have to enter some IPV6 DNS servers to pass out someplace else. Hope that's a start. ( edited) 0. To set up an IPv6 Internet connection on your NETGEAR router: Launch a web browser from a device that is connected to your router's network. Enter www.routerlogin.net. A login window displays. Enter your user name and password. The default user name is admin. The password is the one that you specified the first time that you logged in.IPv6 is certainly supported on Comcast/Xfinity on the UDM. I have a score of 19/20 on IPv6 test. Configure as below and then reboot the UDM. You should have a 128/ under 2001: and your LAN should have a /64 under 2601:.After digging in the router settings and doing some troubleshooting, it appears that I am not getting an IPv6 prefix delegated. This was working before the neighborhood network changes. Now, when I tell the router to use a "Prefix from DHCP-PD", it comes up with an address of fec0:1::0/64. I very much doubt that Comcast is handing me this, as ...If 60 doesn't work, try 56, and then try 64. You can use the default ipv6 DNS servers Comcast provides, but I have mine set to the OpenDNS servers. The last screenshot is just showing all the default rules the USG set up for IPv6 interfaces. I didn't set anything up there and hopefully you don't have to either.The message delivered was "No IPv6 detected. You appear to have no IPv6 at this time." When I review the setup for IPv6 on my TP-Link AC1750 router, it shows a connection type of DHCPv6, an IPv6 address, a default gateway, and IPv6 DNS address. Is IPv6 in use on my PC? Am I setup correctly? Why does the Comcast test disagree with the TP-Link setup?After digging in the router settings and doing some troubleshooting, it appears that I am not getting an IPv6 prefix delegated. This was working before the neighborhood network changes. Now, when I tell the router to use a "Prefix from DHCP-PD", it comes up with an address of fec0:1::0/64. I very much doubt that Comcast is handing …Sep 24, 2019 · The Comcast IPv6 DNS servers will be prepended regardless of any other setting, static or dynamic. Additionally, all IPv6 DNS lookups are "intercepted" by Comcast and redirected to their IPv6 DNS servers. IPv6 cannot be disabled overall - even if devices have their IPv6 "turned off", the router will forward v4 to v6 and insert itself in the mix. Somehow, the 2001:558:feed::1 IPv6 DNS server is trying to redirect my website to some other IP. This behavior seems EXTREMELY fishy to me. Domain name is registered through GoDaddy, and the DNS is handled by GoDaddy's DNS servers, which points to my IP address where the site is hosted. The site is actually hosted on a …

Aug 2, 2020 · I am having issues setting up my static IPv6 Address from my Comcast Cable Modem. If I bypass the USG and connect directly to the Comcast Cable Modem, IPv6 works correctly. I also have my static IPv4 address working correctly on the USG. I reviewed the following Instructions: . Flaming buffet montclair

xfinity ipv6

If you’re looking to get the most out of your Xfinity internet bundle, read on! In this article, we’ll cover everything you need to know to get started, from using the Xfinity app ...Provide IPv6 to your LAN including the clients behind it. For step 1 start with selecting the appropriate IPv6 mode, reconfigure the WAN interface and try to ping an IPv6 address or host from the firewall itself, e.g.: Test if ping over IPv6 to Internet is successful (also possible via Interfaces‣Diagnostics‣Ping ).Welcome to the Xfinity community! Our community is your official source on Reddit for help with Xfinity services. If you have questions about your services, we're here to answer them. We can help with technical issues, general service questions, upgrades & downgrades, new accounts & transfers, disconnect requests, credit requests and more.I turned on IPv6 in my router because I read it makes xbox online gaming much better according to microsoft, but im wondering if anyone can explain to me …I cannot find the settings on the router using the local web interface, using the Xfinity app, or the Xfinity website. I dont have time to explain why I need to do this as this is not a debate on why I should use IPv6 or how to get around the many issues I have because of it, I just simply would like to know how to disable IPv6 as a Xfi customer.Check the Provide DNS configuration via radvd. Under Firewall-->Rules -->Lan. Add an IPv6 Lan Net entry to allow IPv6 traffic on your lan, just look at the IPv4 rule for a guide. Make sure you saved everything while doing this and reboot (again). When it comes back up, you should have IPv6 on the WAN interface.Gmail, YouTube, Instagram, and Wikipedia all support IPv6, but a lot of sites don't. Like chase.com (Chase Bank) does not, for example. Its possible to misconfigure a computer so that IPv4 doesn't work but IPv6 does. Comcast supports IPv6, and if the site also supports IPv6 the site will work even if IPv4 is broken.@user_c5b358 If you are using Xfinity equipment, you won't be able to disable IPv6. You can on some 3rd party routers/mesh networks -- look for the WAN connection on the router admin setup page, and it's easy on a firewall. Just don't configure IPv6 on the external interface. Depends on what you have to work with.As you may know, Xfinity recently graded it's network speed to 2.5gbs. That change obsoleted my Motorola MB8600 cable modem, and altered my IPv6 subnet mask from a /64 to a subnet mask of /128, assigning a single external ip address. The MB8600 was quickly replaced with a 2.5gbs capable Motorola MB8611. I had a career in IT; senior …Greetings all, After racking my brain for the past few weeks as to WHY my speed dropped from 800-900 to 500-600. I even went out and got a new Modem (Arris S33). I found out that my AX-86U (on Merlin 388.1), had IPV6 enabled. I turned it off and it's working correctly. (Getting 1000-1200Mbps from spdMerlin at the router).Comcast's IPv6 actually works really well, a lot of providers do not implement it as nicely as they do. A few IPv6 tips though as a first-timer: Make sure you have proper firewall rules in place on your router, because with IPv6 each computer\device on your network will have a globally routable IP address (which they currently don't).Unfortunately IPv6 on Comcast Business is not truely static. They assign your IPv6 addresses utilizing prefix deligation (PD). In my experience the address range is tied to the modem so if your device is ever swapped you will get a new range unlike IPv4 which can be transfered from device to device since they use RIP for routing IPv4. Not …Jan 25, 2020 · For IPv6, no custom configuration is required on the Business IP Gateway since the provisioning of the IPv6 prefix is managed by Comcast. You would need to subscribe to a block of IPV4 static IP addresses to get the IPV6 static IP's. PTR records can be requested by calling into our care teams through 1-800-391-3000, or you can always reach out ... You can effectively disable DHCP over IPv4 by making the lease pool only one IP wide, and make that a reservation for your your PiHole server. But you can't disable IPv6 or set an internal IPv6 DNS server, so devices will still use Comcast even if you use another device for IPv4 DHCP. Best way I was able to work around it was change the DNS ....

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