Solved

Comcast Modem Port Fowarding

Posted on 2011-03-11
3
1,030 Views
Last Modified: 2012-05-11
I am an experienced computer and network tech, but this has me stumped. Comcast SMC Modem/Router will not open ports. Have a Security Camera DVR plugged directly into the modem/router. Opened ports 80 8800 3000 3001 3003 3007 on the firewall page. Port 80 works great and is open. None of the other ports will open though. Completely stumped. is there something I a missing?
0
Comment
Question by:JTechComputer
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
3 Comments
 
LVL 3

Assisted Solution

by:tearman
tearman earned 166 total points
ID: 35112599
That's weird that port 80 of all ports works.  Most ISPs block that one.  You might check and make sure you're not NAT'd beyond your firewall on Comcast's side by running a traceroute to google.com (you'll see a Private CIDR beyond your local address).

If not that, then run nmap against your firewall (from the outside) to make sure those ports are even open
0
 
LVL 16

Assisted Solution

by:sjklein42
sjklein42 earned 167 total points
ID: 35112894
How are you testing it?  From inside the LAN or outside?  If outside, have you tried from at least two different ISPs - and Internet phones, etc don't count.

I ran into a similar situation where it turns out port 8800 was being blocked by the client's ISP, not the server's.
0
 
LVL 8

Accepted Solution

by:
ZombieAutopsy earned 167 total points
ID: 35113049
I hate those things. I have 2 facilities that had those both with sercurioty cameras. one with 4 and another with 8, i called comcast and had them switch them out to stand alones and put in my own router/firewall with vpn capabilites. Thats what i been doing with all my sites. You should look into it. It doesnt cost you anything from comcast.
0

Featured Post

Instantly Create Instructional Tutorials

Contextual Guidance at the moment of need helps your employees adopt to new software or processes instantly. Boost knowledge retention and employee engagement step-by-step with one easy solution.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

I recently attended Cisco Live! in Las Vegas, a conference that boasted over 28,000 techies in attendance, and a week of hands-on learning hosted by a solid partner with which Concerto goes to market.  Every year, Cisco displays cutting-edge technol…
When you try to share a printer , you may receive one of the following error messages. Error message when you use the Add Printer Wizard to share a printer: Windows could not share your printer. Operation could not be completed (Error 0x000006…
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
Here's a very brief overview of the methods PRTG Network Monitor (https://www.paessler.com/prtg) offers for monitoring bandwidth, to help you decide which methods you´d like to investigate in more detail.  The methods are covered in more detail in o…

737 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question