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0
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2answers
231 views

Comcast Business Gatway cg3000dcr kills VPN connections after about 3mb of transfer

I use an L2TP/IPSEC vpn client behind a CG3000DCR Comcast Business Gateway Router, and while it establishes a connection initially, after about 3mb of data transfer, it stalls out, doesn't do any more ...
0
votes
1answer
47 views

port 53 works through router but not without it

I have a linux server behind a Comcast business gateway. The gateway has two static ip addresses. I want to forward ports 25, 53, 80, and 143 for both ip addresses to the server. Within the gateway ...
0
votes
1answer
156 views

How to set up a static ip from Comcast on Ubuntu?

I'm trying to set up a static IP on an Ubuntu machine that is connected to the internet via a Comcast gateway (SMC). Following their instructions I added this to the /etc/network/interfaces (the ...
1
vote
1answer
116 views

Cisco wrv210 static IP behind comcast router too slow

So I subscribed to a Comcast business account (cable internet provider) and put a Cisco WRV210 in front of the Comcast modem. They gave me 1 static IP address which i'm planning to use to access my ...
0
votes
1answer
1k views

What's the best scenario for using a wireless router with Comcast Business Class [closed]

Just had Comcast Business Class internet installed (usage details at bottom of post). During the call to order I asked about the hardware they'd be providing and was told it was a docsis 3 modem that ...
-3
votes
2answers
694 views

Ping mystery (Comcast) [closed]

Update 2: Obviously, Comcast support's solution is to ask me to reboot the modem. They say they cannot answer more directly, because -- I kid you not -- tech support does not have access to the ...
1
vote
2answers
5k views

Locked out of our Comcast Business Gateway for seemingly no reason

A little backstory... Last fall we migrated our ISP from AT&T to Comcast at one of our offices. At that time, we received a new modem/router from Comcast and we configured everything to our ...
0
votes
3answers
2k views

Cannot resolve domain from within LAN

I just set up a Debian server in our office. We have a business account with comcast without static IP, so I'm using DynDNS to point a domain at the machine. The problem is that I can't resolve the ...
0
votes
1answer
160 views

2 HP Procurve 4000M trunked switches and Comcast SMC Gateway

We've got 2 HP Procurve 4000M switches joined by a trunk. Switch 1 is connected to a Cisco 2600 router which is connected to a T1. Internet traffic for hosts on switch 2 must pass through the trunk. ...
1
vote
2answers
67 views

50 People All over the World hit web app versus 50 people on the Same LAN? Any difference?

At my office we use a LAN (connected to internet through Comcast) and 30-50 people all accessed a web app (on Heroku) simultaneously. The server responded as if it had been hit by 50K people. Am I ...
-3
votes
1answer
2k views

How to get Comcast to stop blocking me? [closed]

I am a web developer running a demo server at home. My site is accessible from Atlanta as well as via my local cellular network. However, both a webserver I have in Utah and a webserver of a service ...
1
vote
2answers
2k views

Sendmail relay authentication

I'm trying to set up my sendmail to authenticate against a relay (comcast). I'm not seeing any attempts to authenticate at all. I'm trying to just debug how authentication works, and can't connect all ...
0
votes
4answers
882 views

Server hosting on Comcast - Would they do anything for a small server?

I'm setting up a web server for a small business, and the only ISPs in our area are Comcast (15MBPS upstream) and Qwest (90KBPS upstream). Qwest seems completely unbearable as a choice for server ...
0
votes
3answers
1k views

Comcast Business Class router setup

I do know a little about networking but im having some trouble trying to figure out in my head how to make this work before comcast comes to do the install on thursday. Right now we have AT&T DSL ...
1
vote
1answer
713 views

Cisco switches and Comcast SMC3G: DHCP works, IP doesn’t

I’m the chairman of the wiring committee for a hundred-unit condominium, and not a Cisco expert. Yesterday we got Comcast Business service, with an SMC3G router/modem, which works fine in isolation, ...
0
votes
2answers
498 views

VOIP over Comcast causing problems

We're running a VOIP system over Comcast. The problems are: Some calls don't complete (both incoming and outgoing) Some phone calls get terminated in the middle of the call. I want to run some ...
0
votes
2answers
499 views

Intermittent DNS timeouts, independent of DNS provider

This is a problem that has plagued my office for a few months now. It has bounced between our ISP (Comcast), our IT contractor, and even our VOIP contractor, each of which has "fixed" it at least ...
1
vote
2answers
447 views

Comcast Business Class server setup

I have just purchased Comcast Business Class internet (CBC) for my small business and I am acustom to being able to use my own equipment. Normally to direct HTTP traffic to a server on my local LAN ...
1
vote
2answers
583 views

One Comcast Business Gateway, One Router, Two Web Servers

I have a Comcast business account with a router and a web server (info) attached. behind the router there are multiple computers and a second web server (info) which also serves as a file server. ...
-1
votes
1answer
100 views

IP address advice

Currently, we have a T1 line and Comcast. The web traffic is mostly over Comcast while the email traffic is over the T1 line. We want to swap it. Is there an advantage to get multiple IP address ...
0
votes
2answers
803 views

Possible to set up email server using Comcast Business?

I'm in no way an expert on this, and realize I might just get told that I'm inexperienced and should not even bother, but I want to know if it's possible to set up an email server on one of our ...
1
vote
5answers
1k views

How do I route a public Class C network through Comcast router?

We have a public class C network that our company owns, we're moving from T-1 lines to cable, most of my public servers will be moving to a data center, but I still need the public class C network ...
1
vote
3answers
399 views

Swap static public IPs without creating DNS conflicts?

Our ISP is Comcast and we have 5 static public IPs from them that we use for various services, including customers connecting to our network, VPN, web, DNS, etc... We need more IP addresses from ...
0
votes
2answers
4k views

Routing static IP traffic on a Comcast Business Class IP Gateway (SMCD3G-CCR)

We are in the process of replacing our firewall, which is currently the only thing connected to our Comcast Business Class modem. Comcast gives us 5 static IP addresses. Currently, all traffic to all ...
1
vote
5answers
4k views

Routing multiple static IPs from ISP at the cable modem?

I'm taking over IT responsibilities for a previous IT guy. We have a 50mb cable modem connection from Comcast along with 5 static IP addresses: XXX.XXX.XXX.180 XXX.XXX.XXX.181 XXX.XXX.XXX.182 ...