They do not do bridge mode on their modems, thus the traffic destined for your business connection isn't hitting your firewall. I've run into this before with them. According to this reddit post, Comcast has to use LAYER 3 BRIDGES as modems for their static IP business clients, it just happens that their Cisco bridge has SIP ALG enabled by default with no documentation saying so, and no way to disable it. The modem has to be bridged before connecting to a router since applications like VPN, P2P, and remote management require a public IP Address on the router WAN port for a successful connection. Anyway, I have port 0/0 into the modem, and have AE Extreme into port 0/1 of the ASA. [Business] How do I configure SMC modem for bridged mode ... How to run a static IP through a Comcast business class ... Only users with topic management privileges can see it. Mode Or Bridge Comcast Passthrough [WT7KS1] We only use Comcast/xFinity for Internet, not for TV, Email or anything else. In the firewall and NAT rules on the Sonicwall, setup the ports (Sonicwalls actually have a handy wizard for this): How to get into a modem/router that is in bridge mode ... The technicians braved the storm and setup the line, and I had a shiny new SMC 8014 modem with an assigned static IP running in no time flat. This is the biggest reason why I gave up on using Comcast with static public IPs. After a few minutes, the 5505 stop passing web traffic. Detailed listings of compatible devices for Business Internet are available here. Does the line "Cannot have a fixed Static IP assignment" in the docs refer to the modem or your LAN? It’s available for all speed tiers with a Comcast Business leased modem. Comcast Business I've got a Comcast business connection with a static IP that I'm finally getting around to setting up. There is a ton of misinformation on the internet about how to properly do this: The bottom line is, there is no way to put this particular modem into conventional passthrough (bridge) mode where it will provide a routable public IP on the LAN ports. I have an SBG6580 modem/router in bridge mode with a router to it so I can use my own router (AE Extreme). Comcast 3. From the left-hand column, select Gateway > At a Glance. Not sure who to believe, but I am suspecting based on other posts on Comcast forums one does NOT need static IP for bridge mode to work. As a Comcast Business Internet customer, you have the option to purchase a cable modem to use with your service in place of the Comcast-provided gateway. they give you a modem/router box and i was wondering what to do as far as opening up my network so i can get my server public facing. Confused about D3G bridge mode (pass-through) - is a ... I have one of those IPs working well on a Meraki AP. Connect with Comcast Customer Experts, Official Employees, and other Community members for tips and help with your Comcast Business products. The modem is in bridge mode (set by Comcast). How to switch your SMC Comcast Business Gateway into bridged mode. The RDC address I'm connecting to is 24.n.n.n:5nn11. I have an SBG6580 modem/router in bridge mode with a router to it so I can use my own router (AE Extreme). Answer (1 of 3): Ask for a static IP address from Comcast. Comcast Business Everything worked, and the world was good. No address, no gateway, no firewall, no NAT, no nothing. Comcast bridge mode access help - Networking - Spiceworks This manual configuration prevents the IP address from changing. Currently I am unable to do this, I am also unable to ping the Comcast device. Just like an old dial up modem. Cannot have a fixed Static IP assignment"-- Comcast_John 12-15-2014; And other posts stated that only Comcast Support could turn on "true bridge mode". I'm a NOOB with this firewall stuff. Basically, the DMZ option (left menu) offers you identical functionality. I haven't been able to find a good incantation for Router WAN port configuration with Comcast Bridge mode. Next to Bridge Mode, click Enable. I am looking to be able to login to the Comcast Gateway/Modem (10.1.10.1) from any connected computer on my network. Hi and Thank You in advance. Bridge mode is the configuration that disables the NAT feature on the modem and allows a router to function as a DHCP server without an IP Address conflict. Forum discussion: Hello. If you assign a static it will route that IP to that device, if … Location 1: Static IP / Netgear router (Business class internet) Modem is configured in bridge mode. I put it in bridge mode and configured the public static IP address on the public side of a Sonicwall TZ400 (X1) and set up DHCP for a private subnet and forwarded a port to a test machine inside. Log into the modem. Default IP address is usually 10.1.10.1 with comcast, login is cusadmin password highspeed. If you have a router or wireless access point between the modem and your machine you may need to connect direct to it. Comcast 'business' modem requires you use DHCP. - Cisco RV042G router *. I've gone in to the tp-link interfaces and setup WAN 1 to a static IP on the local subnet for each site. A message appears stating "WARNING: Enabling Bridge Mode will disable. The Comcast Business IP Gateway (SMC8014 or NETGEAR CG3000DCR) is configured for pseudo bridge mode by disabling the normal routing, firewall, NAT and DHCP functions. The Internet-routable static IP address is assigned the Linksys WiFi router WAN interface for remote Internet access to LAN clients. I want the Comcast DHCP serve (10.0.0.X) r to provide all IP addresses, so that wireless (from Comcast modem) and wired connections are on the same network. We had comcast issue us a static ip address for each location. Comcast does not block ports and they do not secure any transmission with that gateway in bridge mode. Location 1: Static IP / Netgear router (Business class internet) Modem is configured in bridge mode. If, for whatever reason, a router being connected between the Comcast Gateway and the rest of your LAN does not automatically update the Comcast Gateway’s routing table with its LAN information, use the Static Routing setup page on the Gateway to manually add that route. All static IP's in the block will have the same gateway IP - which is the ACTUAL ip address of the comcast modem itself. what they told me and what pfSense reports as the WAN IP - i.e. When they supply it, it should come with a gateway address and a netmask in addition to the static IP address. Pass through lets you set your gateway wan IP as the static assigned to you. Before Comcast reads this and goes to reply PLEASE I already know with your system with a modem in bridge mode static IP is not possible on a device behind the modem. When I changed mode modem on mode Bridge, my router received dhcp ip address from pool Comcast but how I understand my router need receive ip address 1.1.1.1 because this ip address is gateway for all other static ip address from my pool; Me need connection all my devices between my router Called Comcast and for some reason 'the block of IP's you were issued are no longer valid on Comcast's network" They issued me new IP's, but I cant get anyone in from the net (RDP, RWW, OWA, VPN, PCanywhere, SMTP) I have the 'new' static IP set on the SMC (new gateway, subnet and DNS as well) but still no luck. I have a Comcast Business DPC3941B modem with bridge mode disabled. This is not true Bridge Mode and does not convert the gateway to a basic cable (stand-alone) modem. The below information explains the difference between IP Passthrough vs Bridged mode and provides instructions on how to configure the Arris BGW210-700 Internet Gateway for IP Passthrough. IP Address: 192.168.1.2 Subnet Mask: 255.255.255.0 Default Gateway: 192.168.1.1 DNS #1: 192.168.1.1 #5 Now you can connect the WAN port of the third router to the LAN port of the as the the device that is in bridge mode . I have a new Netgear 7000P (V1.0.0.58_1.0.50) that is connected to that gateway.When I installed it about 6 weeks ago, it would not get, or the gateway would not give, an IP address. Does the line "Cannot have a fixed Static IP assignment" in the docs refer to the modem or your LAN? Comcast tech should be able to do that for you. I plug the WAN1 interface into the LAN1 port on the cable modem and just let the MX grab its DHCP info right from Comcast. When Bridge Mode is enabled, the router function is turned off and the device directly connected to the SBG6400 will receive the Public IP address from the Cable Provider. Doubble NAT behind Comcast Business with Static IP. I know I have C business class and I am using a Cisco 1921 ISR G2 with IOS Zone Firewall and the SMC is just in vanilla cable modem mode. Location 2: Dynamic IP (Residential internet) - I have two dynamic IP Addresses from comcast (I'm being charged for two anyway) - ARRIS TG1682G Cable Modem/router. I currently have a Comcast Business IP Gateway, SMC8014, connected to a switch with multiple PCs. As the description states, I cannot get my router (UDM-Pro) to receive my static public IP from the Comcast business modum+router. You need to call Comcast Business and have them "load the static"s into the Comcast-owned modem, then put it into pseudo-bridge/passthrough mode. Tc8305c bridge mode trying to connect netgear. Not sure who to believe, but I am suspecting based on other posts on Comcast forums one does NOT need static IP for bridge mode to work. If I put the modem/router in "bridge mode," it forces me into a single DHCP address, and that is as expected per Comcast documentation. True Bridge Mode on DPC3939B for comcast business. I've never tried to figure out exactly what Comcast does, but basically the modem needs to pass your traffic differently to the head … Calling Comcast for help is painful. The Comcast routers I’ve dealt with (usually Arris) have two bridge modes. A: No. Tp link at site A wan1 is set to 10.1.10.215 and site b is 10.20.30.233 On both comcast modems I've setup port fowarding for the respective static ips of the tp-link devices so that ports 4500 and 500 UDP are open I put it in bridge mode and configured the public static IP address on the public side of a Sonicwall TZ400 (X1) and set up DHCP for a private subnet and forwarded a port to a test machine inside. Additionally, if you want to have static IP addresses, you cannot put the IP Gateway in bridge mode. A static IP address is manually configured. One of my coworkers runs a business/site out of his home and despite having all his own equipment, they make you use their gateway but you can put it in bridge mode. internally, this side of the modem, pfSense is assigned an IP via DHCP - i.e. You’re pretty much stuck using their gateway and they won’t put it on bridge mode. You can’t use your own modem either unless you’re getting an … I am able to ping the default gateway even though I can not surf the web. I just switched to Comcast Business HSI with a static IP. You'll find different credentials are necessary to access the main router dashboard. Public would require DHCP. Here's where it gets tricky for me: The Meraki IP is X.X.X.101. Make sure that the devices that are to receive a public IP address are directly connected to the SBG6580's Ethernet ports. Get a static IP address from Comcast. Select the speed tier to which you are subscribed to locate compatible devices. Re: [Business] Business- must use Comcast router if using static Short answer: yes, you MUST use the SMC. I need some help here.. With Comcast Business and a static IP address, you can't actually use Bridge mode. I have tried multiple setups. Jan 16, 2018 at 11:29 AM. The Netmask is 255.255.255.252. Whenever comcast changes customer ip address, the modem does a reboot, and I am forced to contact comcast tech line to have modem placed in bridge mode, in order to use own wireless router (R7000). You were given a gateway IP and it is ALSO the static IP for the public side of the Comcast router. Not to block anything not to filter anything not to change those packets in anyway. All you want this modem to do is to simply pass you all packets of information. I have a new Netgear 7000P (V1.0.0.58_1.0.50) that is connected to that gateway. Thanks Tom. Do not connect personal router until after above reboot step #3 is completed. Put xfinity modem in Bridged mode, save and reboot. A static IP allows you to run an email, web or VPN server, from a device behind the Comcast modem (Gateway), with a static routable (publicly accessible) IP address. Open a web browser, and go to the Admin Tool at 192. The Comcast equipment is a Cisco type-BWG model-DPC3939B Business IP Gateway. However, Comcast/Cisco made this very special router/modem with LAYER 3, SIP INTERFERING BRIDGE MODE. Last time I called, I had to explain networking to them and they argued with me that I "had IPv6 address and that it is my modem's hardware address" and "everything looks fine on our end". This topic has been deleted. Have Comcast provision the modem in “virtual bridge mode”. Click OK Confirm Bridge Mode screen on Comcast Business Wireless Gateway **Note**: the Cisco 3939B BWG cannot support WiFi in bridge mode. Could work, if you finished the setup ;) If all incoming traffic is NATted from 50.2xxx.xxx.130 to 10.1.10.1 - then you should set your pfSense WAN IP to static and set it to 10.1.10.1 etc. Enter the default username and password: Username: admin. No changes are required to the Comcast business gateway. Here is my setup. With my modem, there is no address I can reach from outside my network, but I can access it on the LAN side with an address in the 192.168 range. The Gateway is X.X.X.102 Setup static routes inside any to modem gateway. This allows traffic to pass through the modem to a routing device and can be used since you have a Static IP address. Do you have a static ip? Yes you put the modem/router in bridge mode and since the account is static IPs, usually you wont get dhcp anything if you connect your laptop directly to the netgear. Additionally, if you want to have static IP addresses, you cannot put the IP Gateway in bridge mode. When I installed it about 6 weeks ago, it would not get, or the gateway would not give, an IP address. The pfsense router is configued with my first static ip address, subnet mask (255.255.255.248) and the SMC public ip as the gateway address. A true bridge mode and a passthrough bridge mode. Think of it like two different people having the same phone number- sometimes the call will go to one, and sometimes the other. I have tried multiple setups. I have Comcast with 5 static IPs. Eventualy we will have a proper server hosting a web site and all business applications but for now we wish to be able to access each others programs and files such as quickbooks and accubid estimating software. With my modem, there is no address I can reach from outside my network, but I can access it on the LAN side with an address in the 192.168 range. Q: Do customers need a certain speed tier to purchase Connection Pro? Calling Comcast for help is painful. Anyway, I have port 0/0 into the modem, and have AE Extreme into port 0/1 of the ASA. However, Comcast/Cisco made this very special router/modem with LAYER 3, SIP INTERFERING BRIDGE MODE. Sometimes, you may wish to use your own router instead, and have your Comcast Gateway act simply as a modem. Static ip with bridge mode on DPC3941B Comcast Business . Bridge mode, yes, it worked perfectly, but lost my static IPv4s that way and was assigned a dynamic IP. We know the effects of COVID-19 have been drastic and we are here to help. If you have Comcast business without … I am trying to determine why Comcast Business Class modem configured with a static IP (IPV4) works with a laptop or Linksys Cable modem but not with a Cisco ASA 5505. http://forums.businesshelp.comcast.com/t5/Equipment-Modems-Gateways/True-Bridge-Mode-vs-Pass-Through-Mode/td-p/21260 24.n.n.n is the Comcast modem WAN address. Reconfigure Comcast Business IP Gateway so can use own router. Comcast seems to not care about the bridged network as much. Sounds like the best way would be to put your Comcast modem/router into bridge mode, then get a business class router/firewall (I like Sonicwall) and configure the WAN interface with your static IP addresses. Here's the scenario: Client uses Comcast and has the Comcast Business modem/router (I won't call it the gateway here to avoid confusion) . Bridge Mode means turning off all features and using their (AT&T's) router as nothing more than a "pass though". Forum discussion: At a site I manage with Comcast Business I need a static IP but I also need the modem bridged. Add to this that the Comcast tech last night told me that there is a difference between bridge mode and pass-through modes, which I … ANSWER: Connect an Ethernet cable between your Motorola Cable Modem Router and a computer. A network switch connected to the gateway (bridge mode) won't work, since every device is still trying to compete for a single IP address. On my old connection, I used the modem as a gateway and set up port forwarding. In
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