Solved

Comcast Modem Port Fowarding

Posted on 2011-03-11
3
1,024 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
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

IT, Stop Being Called Into Every Meeting

Highfive is so simple that setting up every meeting room takes just minutes and every employee will be able to start or join a call from any room with ease. Never be called into a meeting just to get it started again. This is how video conferencing should work!

Join & Write a Comment

This is an article about my experiences with remote access to my clients (so that I may serve them) and eventually to my home office system via Radmin Remote Control. I have been using remote access for over 10 years and have been improving my metho…
If your business is like most, chances are you still need to maintain a fax infrastructure for your staff. It’s hard to believe that a communication technology that was thriving in the mid-80s could still be an essential part of your team’s modern I…
Get a first impression of how PRTG looks and learn how it works.   This video is a short introduction to PRTG, as an initial overview or as a quick start for new PRTG users.
In this tutorial you'll learn about bandwidth monitoring with flows and packet sniffing with our network monitoring solution PRTG Network Monitor (https://www.paessler.com/prtg). If you're interested in additional methods for monitoring bandwidt…

760 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

Need Help in Real-Time?

Connect with top rated Experts

16 Experts available now in Live!

Get 1:1 Help Now