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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.Jan 10, 2022 · 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. The Reserved IP Address must be in the range shown at: Gateway > Connection > Local. IP Network. Worth adding to this answer that should be the one accepted, that the iptables command could be edited with -d 192.168.0.0/24 -j so that only those IPs traffic are rerouted, it would be iptables -t nat -I POSTROUTING -o `nvram get wan_ifname` -d 192.168.0.0/24 -j MASQUERADE. Otherwise you lose other internet traffic.Accessing the IP address of your Comcast wireless router is crucial for reaching the router's admin panel. The IP address serves as a unique identifier for your router on the network. Here's how you can find and access the router's IP address: In the address bar of your web browser, enter the default IP address for Comcast routers, which ...Page 48 CBR2 CGA4332COM- User Guide How to assign a reserved IP Address 1. Go to the Admin Tool (http://10.1.10.1), using a computer or other device that is currently connected to your Gateway (either wired or wirelessly).Now, I find a couple of clients od my business are not getting email I send, as I am being blacklisted by a couple of antispamming entities. I am trying to remove myself from Sam rats, but when I search my IP, I am getting a fail message to the test: "Does IP Address comply with reverse hostname naming convention."Currently, our Comcast modem is in bridge mode because we are providing our own firewall to sit behind the modem. When I configured a static IP in our assigned IP range to the firewall's external facing interface and plugged that into the first port on the Comcast modem, attempts to ping our assigned gateway address were rejected. …not getting IP address from Comcast modem. My router is set to obtain the WAN port IP address via DHCP, which works fine. The Netgear CM600 modem assigns a routable (public) IP address to my router's WAN side. Something different happens if I disconnect the router from the modem and connect my laptop directly to that single network port on the ...We are using Comcast Business Starter Internet for our office and planning to buy a modem instead of leasing it. I'm checking Comcast's website. It's showing the following modems are compatible for our service. Arris/Motorola Retail SB6120 SURFboard DOCSIS 3.0 Cable Modem. Arris/Motorola Retail SB6121 SURFboard DOCSIS 3.0 Cable Modem.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 …Rebooting the router got access to 10.0.0.1 back, so that question is answered. I'd still like to know if there's a way to assign a static IP address via the Xfinity app. Supposedly the app is supposed to be able to do "everything," but I don't see a way to do that.When I try to VPN into our network using the external static IP address to an internal IP address using port 443, the connection attempt just times out. Just to see if there might be something blocking the connection over port 443, I removed the port forwarding entry for VPN/SSTP in the CBR-T router and replaced it with a NAT entry …We are using Comcast Business Starter Internet for our office and planning to buy a modem instead of leasing it. I'm checking Comcast's website. It's showing the following modems are compatible for our service. Arris/Motorola Retail SB6120 SURFboard DOCSIS 3.0 Cable Modem. Arris/Motorola Retail SB6121 SURFboard DOCSIS 3.0 Cable Modem.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.3) Then, I change the configuration from "DHCP" to "Reserved IP", choosing a new, previously unused IP address from the DHCP range, 10.0.0.50. 4) I click "Save" 5) I get "Operation in progress" then after a few seconds : "Failure! Please check your inputs." I tried to modify the DHCP range from 10.0.0.2 to 10.0.0.30 . I repeated steps 1-4 above.Click "Start" on the computer plugged in (or connected through a router or switch) to the modem. Step 2 Click "Programs" and open your Internet browser of choice.CCCassandra. Thank you for joining us on the Xfinity Forums @macman218! We don't currently offer the option for a Static IP through residential. However, it would be available through Comcast Business services! They can be reached by calling 1-800-391-3000.To do so follow these steps. Click "Sign In" if necessary. Click the "Direct Messaging" icon: or https://comca.st/3OSGmTC. Click the "New message" (pencil and paper) icon. The "To:" line prompts you to "Type the name of a person". Instead, type "Comcast Business" there. - As you are typing a drop-down list appears.May 18, 2020 · 4 years ago. I believe my problems stems from routers starting their IP address range from the 192.168.1.1 Default Gateway address. My router's addressing scheme can't be changed, but Comcast is giving me a Default Gateway IP address of 98.215.10.1, so any address my router tries to assign is 'out of range'. I can't find anyone at Comcast who ... If they are on an older modem you can call Comcast and have them bridge the modem for you. When you bridge the modem the device gives your firewall a public IP via DHCP. I suspect this would bypass any SIP ALG the device would have. If you have a static IP then you already have a public IP address so this would not be helpful.

I have been using both ipv4 and ipv6 since Comcast began supporting ipv6 (quite a number of years ago). The dynamic ip should be an ipv4 though and you should also get a ipv6 address and a prefix (/64 or /60). If you are switching between routers, be sure to reboot the modem as they get locked to the wan Mac address.This used to work. We use Remote Desktop Connection to connect to our public IP address including a port number (50.n.n.33:51115) to a specific computers port 3389. The port forwarding rules are on our firewall device. We can’t get the Comcast modem to pass the 51115 port number thru to the firewall.I can't re-use the IP addresses since they are taken by the offline devices. 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 …Now I cannot receive emails. I understand I have to redirect my emails to the new IP address, but that is where things start getting muddy. GoDaddy has two addresses in my domain: one called "@", end the other one called "mail". My Comcast router reports two addresses: "IP Gateway: 50.245.83.170" and "IP Static: 50.245.83.169"

Hello there, About a week ago I upgraded to the Comcast Business service, which comes with the high-end Comcast Business router, some static ip addresses, and some other features. Anyways, I setu...Everything worked fine, I had internet via the Comcast modem through the Cradlepoint. I checked my laptop and I pickup a 192.168.165.x IP and I can communicate with the internet. I disconnect the coax on my Comcast modem to simulate an outage but the Cradlepoint will not kick over to cellular. I guess again a call to Comcast.…

Reader Q&A - also see RECOMMENDED ARTICLES & FAQs. The default Comcast IP address is 10.0.0.1. ... The rental f. Possible cause: Hi there and welcome to Comcast. @user_ac0121, I am sorry to hear you are .