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Thank you so much for taking the time to reach out to us through our business forums. I can understand how important a VPN for business needs. I connect through a VPN daily and I truly understand the impact that this can have. We do not directly supp

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Clients with Comcast Home service cannot connect to VPN but Comcast Business can

I realize that I am posting this in the Business forums but Comcast support is no help. I am an IT Consultant and I have Comcast Business class internet at my home where my office is. Here is the problem I am running into and this is not the first time. First I saw this on the Eastern and North side

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Hello sbsfree and welcome, I recommend you consider setting you VPN Server with your static IP routable address. This is because your StaticIP address on the SMC comes with no firewall and all ports open. Therefore, your standard VPN server ports wil

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Windows VPN with Comcast Modem SMC Networks

I'm trying to configure Windows VPN with a LAN computer so that users outside can access it remotely. SMC D3G We have a SMC D3G Comcast IP Gateway with a static IP internet address that I tried to use with the forwarded port 1723 to the VPN Server with ip 10.1.10.xx. The VPN Server is connected dire

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Apologies.  What I should have said the first time is that there is no field on the same page as the DHCP Range data entry field that would allow me to change the VPN space.  From what I understand from another post, the VPN data entry field is hidde

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10 years ago

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Need to increase DHCP space

I keep having an issue when I try to expand the range of the DHCP server.. When I set it to go above 199, I get a -Invalid value for VPN IP. VPN IP Range Cannot Overlap DHCP IP Range- error message. Obviously, I need to adjust the VPN range, but the cusadmin default customer login doesn't allow me t

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Comcast DNSs are not recognizing our domain so all their users can't access out site or VPN

Hi, All Comcast users use 75.75.75.75 and 75.75.76.76 as their DNS. These servers don't seem to recognize our domain name and it's records. All other DNS providers in world work fine. Please see below proof. tech@MacBook-Pro ~ % dig @8.8.8.8 www.ntst.org; DiG 9.10.6 @8.8.8.8 www.ntst.org; (1 server

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How to get Reverse DNS configured?

Does anyone here know how I can get a reverse DNS lookup configured with Comcast? Last time I needed this some years ago, I called in, got a level 2 technician and was done. Now, I've had three phone calls into support, only given a ticket number on the third call and told customers are not allowed

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Great input train_wreck but I believe the following 5512 X spec says more than just the 150/20 to 150/20 Comcast Gateways (CGs) limiting the overall VPN implementation here:  Use this link instead....  As you can see from the above, the VLANs are rat

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150M/20M bw is good. But site-to-site vpn seems capped at 20M in both directions

comcast router is in bridge only mode..firewall and nat disabled. vpn/firewall device before that, is cisco asa5512x it can support 200+Mbps vpn perf. I tested two back to back and got 250Mbps. I've had no problem with normal download/upload testing: 150Mbits/sec download and 20Mbits/download I've r

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IPV6 trials... no IPV6 provisioning/connectivity

This may not be the right place, but I have sent three emails to the IPV6 to get some visibility on this issue and have yet to receive a response. I was sent a Netgear CG3000DCR gateway to begin the IPV6 trial for business customers in my area. The problem is, I have no IPV6 connectivity, the gatewa

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HelloLatitude42andwelcomeagain, I recommend that you view this article which I have provided to many other business customers who have successful VPN network implementation :  http://blogs.technet.com/b/rrasblog/archive/2006/06/14/which-ports-to-unbl

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How would simpleton VPN work from remote clients

It's me again. This new thread may make yesterday's topic of "LPR delays" moot because now I'm thinking of introducing a VPN router. I've been asked whether it is possible to arrange Windows remote desktop aceess from outside to just one Win7 PC. The software suite they want to use is simply not gea

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I switched for this?

I switched from Comcast Residential to Comcast Business and now I can't use IPV6? What on earth is going on? I see you closed the trials back in September, but I expected that was to wrap up the trials and roll out the IPV6 implementation. What is the deal with Comcast Business? Why is Comcast Resid

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HI Donny_2540. I checked gateway for possible configuration issues. The port forwarding rules configured on the firewall were not enabled.  Please try you VPN access again.   Thank You

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11 years ago

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Connection failed to company VPN gateway

I and my colleagues have a problem to connect to company VPN gateway. We met this problem abrutly from 2weeks ago. Our company use CITRIX access gateway. We can connect it to gateway but we can't access company website. Other websites are ok to connect. I am wondering if comcast block any specific w

Question

I think it might depend on whether you are leasing a static IP or not.... if you are configuring your VPN router/endpoint with a 10.1.10.x address, then you will be depending on the Comcast gateway to pass ESP packets (protocol 50). I do not believe

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VPN connectivity and IP protocol 50

I'm trying to connect a VPN between two sites. I have to Internet providers. Everyhing works correctly with provider 1. When I change to Comcast the circuit and attempt the same connection, the VPN fails to connect. I have tested this with the Comcast Gateway Firewall wide open. Does anyone know if

Question

There is currently no way to get the /60 that a Netgear CM offers unless you send it a DHCPv6 IA_PD request (with anything at all in the request).  See Netgear CG3000DCR IPv6 bugs and quirks for details.  You'll need a new router if the one you have

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9 years ago

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Static IPv6 Routing?

Hello all - I was in the IPv6 trial early on but did not heavily participate as the capabilities of the service didn't match up with my then existing IPv6 deployment. I am happy to see that Comcast is now offering static IPv6 - so I logged into my cable modem (Netgear) and find that there still is n

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Accepted Solution

My apologies; I misunderstood your meaning of the phrase "static IP". Yes, in your configuration, what you are seeing is normal for the newer Comcast gateways. (I'm guessing you have either a Netgear CG3000DCR or a Cisco DPC3939B). The gateway will p

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Can My Static IP Change

I just got a new comcast gateway..... now it seems my static IP has changed! It does not appear to be what it used to be and now appears to be what my former "Gateway IP" was...... I am confused!

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IPv6 no longer present in firmware // Need bridge mode + IPv6?

Previously my modem was set to bridge mode, but for some reason it no longer was working after my service was 'moved' in my office to another COAX plug. Had comcast support place the CG3000DCR back in 'router mode' and that seems to have fixed it, I guess bridge mode is buggy and doesn't work? Now,

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Need to increase DHCP space

I keep having an issue when I try to expand the range of the DHCP server.. When I set it to go above 199, I get a -Invalid value for VPN IP. VPN IP Range Cannot Overlap DHCP IP Range- error message. Obviously, I need to adjust the VPN range, but the cusadmin default customer login doesn't allow me t

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Can't make call

I can't make call. It is not ringing even if my vpn is on or off. I'm using MacOs and I tried deleting the app and reinstall. Still nothing happens.

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I appear to have 2 modems--What's up?

I have a Netgear CG3000DCR and an ArrisTM604G/CT. The only way I've had wireless is by running everything through my old Dlink router. When I log in to set up the wireless, I have a different window than what is shown in the instructions. It takes me to the the Comcast Business page as well which is

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Accepted Solution

@LunarG wrote: I have a CG3000DCR with hardware version 1.04 and firmware version V3.01.04. I run my own DHCP and DNS servers.  So I disable the "Enable LAN DHCP" on the "IPv4 setup" page. But there is no specific setting on the "IPv6 Setup" page for

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CG3000DCR IPv6 interferes with my DHCP and DNS

I have a CG3000DCR with hardware version 1.04 and firmware version V3.01.04. I run my own DHCP and DNS servers. So I disable the "Enable LAN DHCP" on the "IPv4 setup" page. But there is no specific setting on the "IPv6 Setup" page for DHCP and DNS behavior. I found windows and linux systems on the L

Question

Hi train_wreck,thanks for helping me brain storm on this "Have you ever tried setting up a site-to-site between the data center & another Comcast (or any other ISP ) connection, and verified that you can definitely get >20mbps sustained transfer at a

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150M/20M bw is good. But site-to-site vpn seems capped at 20M in both directions

comcast router is in bridge only mode..firewall and nat disabled. vpn/firewall device before that, is cisco asa5512x it can support 200+Mbps vpn perf. I tested two back to back and got 250Mbps. I've had no problem with normal download/upload testing: 150Mbits/sec download and 20Mbits/download I've r

Question

No, in general Comcast doesn't provide a way to "automatically" have devices configure themselves with your provisioned static subnet/settings. You will have to manually configure those on the RV325. You will also need to have the Cisco taken OUT of

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3939B + RV325 confused on how to configure

3939B cable gateway has been in use for several weeks. A VPN was desired by the managers. I signed up for a static IP with Comcast and purchased Cisco RV325 VPN device. The 3939B was placed in bridge mode and I went through the configraiton wizard provided by the Cisco RV325. Here's a configuration

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