Comcast Business Support Community

Accepted Solution

You can't run a typical IPSec VPN through a translator, that's just a property of IPSec VPNs. Forwarding 500 isn't going to do anything. Some manufacturers have modified their VPN concentrators and have special clients that basically warp the IPSec

tmittelstaedt

commented

11 years ago

to the conversation:

0

Port Forwarding with router behind comcast supplied gateway

I need some help. I have a comcast gateway TG862G I also have a netgear R6300. I called comcast support to put my gateway in bridge mode because I want to be able to control my network through my netgear and port forward etc. What am i doing wrong? I need to open port 500 on my netgear (and it is op

Question

Hello, i set up the vpn server with the static ip xxx.xxx.xxx.57 and public internet adddress as the gateway xxx.xxx.xxx.58 the VPN server is connected directly to the modem and the static ip addresss is connected to the internet successfully, i am a

sbsfree

commented

11 years ago

to the conversation:

0

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

Question

Hi mikeinriley. "Comcast IP gateways are not configured as VPN endpoints and should only be set to function as a pass through device to a directly connected customer owned VPN termination device." The "1-Many NAT over VPN" function is not available

CC_John

commented

11 years ago

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VPN Issues with non-Comcast equipment

Hello All, We are trying to do multiple VPN connections for a small business with a Comcast Business Internet connection – Comcast only allows one VPN connection to one inside device at a time (NAT, not PAT) and that will not do. Bought a Zoom 5341J modem and Internet is flowing through it to an Ubi

Question

Thank You for your response. We need port 1299 forwarded to the VPN device IP address 192.168.165.168. This VPN device will allow me access our network from home.Thank You

MikeRindone

commented

5 years ago

to the conversation:

0

Connection Pro Cradle point device

We want to a VPN to our network, but not allowed access to the cradle point router. Who can we reach to get resolved? Thank You

Question

I'm having the same type issues. Try a VPN and see if you still have issues. If I connect to a VPN I do not have the drops. https://forums.businesshelp.comcast.com/t5/Connectivity/Dropping-from-server-Battle-net-Network-Node-in-route-bad-no-one/m-p/3

mattwales

commented

7 years ago

to the conversation:

0

Are DoS Attack - TCP SYN Flooding firewall events causing connectivity issues?

My wife works from home and has been experiencing daily repeated connectivity issues for the past few months causing her Citrix VPN client to disconnect and VoIP phone to drop calls. Examing the router logs today I see 87 Notice Firewall[242]: DoS Attack - TCP SYN Flooding events. The Firewall log a

Question

I've just done some more testing. I switched to remote client vpn testing with tcp (I think) and I can sustain 90Mbits/sec vpn remote client bandwidth, from the remote site (which has a cisco asa5512x for the firewall vpn) I have comcast here, so it'

kevin_0xdata

commented

11 years ago

to the conversation:

0

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

Welcome GlobuSource. As you stated in the post the VPN tunnel is established, ensure that the devices connected to the VPN appliance are active and still associated to the subnet of the VPN. Thank You

CC_John

commented

13 years ago

to the conversation:

0

Cannot Access VPN Help

I am trying to access a VPN at my other office. I can connect to the VPN, but I get no access to the network. Not sure what to do next. Help

Question

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

VBSSP-RICH

commented

11 years ago

to the conversation:

0

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

Question

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

ComcastBiz_Support

commented

6 years ago

to the conversation:

0

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

Question

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

Terry

commented

10 years ago

to the conversation:

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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

Question

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

Question

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Domain Names/Static IP

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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

VBSSP-RICH

commented

11 years ago

to the conversation:

0

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

Question

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

Question

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Equipment

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Hello Mikeinriley and welcome, So please correct me if I am misinterpreting you network interconnect. You have an SMCD3G Comcast Gateway (SCG) with a staticIP address and you are programming your Zoom 5341J (ZJ) WAN interface using the routable stati

VBSSP-RICH

commented

11 years ago

to the conversation:

0

VPN Issues with non-Comcast equipment

Hello All, We are trying to do multiple VPN connections for a small business with a Comcast Business Internet connection – Comcast only allows one VPN connection to one inside device at a time (NAT, not PAT) and that will not do. Bought a Zoom 5341J modem and Internet is flowing through it to an Ubi

Question

U

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.

Articles

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Business VoiceEdge ®

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Are you connected to a VPN at all while accessing the website?

CC_Nico

commented

3 years ago

to the conversation:

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2

Connection issues / DNS resolution

Hi Comcast Business Support, I have been having a problem for several days with my connection. Usually I try to open a web page and it tells me that it is not available. I have to refresh the URL several times to open the web page. There is some problem in the connection when opening a website with

Question

I also jiust added the comcast dns servers to the network settings page. Now the server can connect to the internet. I still cant vpn in to the server. Also based on comments from other people i disabled the firewall on the comcast router to test

oak15

commented

8 years ago

to the conversation:

0

server cant connect to internet and cant vpn to server

Hi, We were with ATT for many years and we swtiched over to Comcast 2 days ago. Comcast set us up with a DPC3939B router. When the person came to install our router. He disconnected our ethernet cable from the ATT router and moved it over to the comcast router. Everything works fine. All our desktop

Question

Accepted Solution

Hello catsine and welcome, I recommend that you make sure that the following ports, depending on your actual functional VPN operation, are open on your Comcast Gateway : TCP/47 GRE,TCP/1723 for PPTP, TCP/1701 for L2TP,TCP-UDP/500 for ISAKMP,SSTP: por

VBSSP-RICH

commented

12 years ago

to the conversation:

0

1

Cannot connect to VPN

I use a VPN to connect to work. Lately I cannot connect at all. I have a Comcast Netgear CG30000DCR modem gateway. In looking over the forums, there seems to be a lot of problems with this particular modem. My VPN IT guys at work say it is not on their end. something with Comcast is blocking it and

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

kevin_0xdata

commented

11 years ago

to the conversation:

0

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

F

@Comcast_Amir No VPN on any device at this location.

Finnegan0805

replied

4 years ago

to the conversation:

0

F

Comcast router (CGA4131 Business Gateway) assigning out-of-range IP4 addresses?

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. Some were just randomly switched t

Question