Solved

Continue to lose internet

Posted on 2004-09-02
3
451 Views
Last Modified: 2013-11-30
Hello all,

I have a problem that I can't seem to resolve.  I just got a home business broadband account, therefore Time Warner came out to my home and replaced my old Cable Modem with a new Cable Modem Router (Ambit router).  I already own a Belkin Router with a built-in firewall.  I would like to continue using my Belkin Router/Firewall with the new Cable Modem Router.

I have 3 PC's (Windows 2000 server and 2 Windows 2003 servers) currently on my network and 1 laptop(Windows XP).  I have two nic's in one server...1 nic has a static external IP and plugs straight into the Cable Modem Router (no problems there - I don't lose internet on that nic).  The other nic goes into a 3Com 8-port hub as well as the rest of the PC's and the hub is connected to the Belkin Router...the Belkin Router is daisy-chained to the Cable Modem Router.  My problem is that i continue to lose internet access.  I believe it has to do with the Belkin Router talking to the Cable modem Router (but I don't know how to fix it ) because I noticed in the security log of the Belkin Router Firewall that it shows attacks from the IP of the Cable Modem Router.  The Belkin Router has a IP of 192.168.2.1 and the Cable Modem Router has a iP of 192.168.1.1.

I can not change the IP of either of the routers..nor does the Belkin Firewall have a way to include a trusted network/zone.  I lose internet access temporarily and then it comes back intemittenly.  I am not using a crossover cable for any of the connections.  The Belkin Router has a CAT5 plugged into the WAN port going to one of the Cable Modem Router LAN ports.  The Belkin Router connects to the hub with a common CAT5.  MAC Addressing is disabled on the routers.

I'm only experiencing interent issues.  The internal network works perfectly fine.  The interenet loses connection every so often then comes back and then loses connection again..so on and so on.  

Any suggestions and help is appreciated.  Thanks.
0
Comment
Question by:zilantyas
  • 2
3 Comments
 
LVL 15

Accepted Solution

by:
adamdrayer earned 500 total points
ID: 11963872


  Serv1------------------------Router
      |                                      |
      |                                      |
8-port hub---------------------Cable Modem Router---------------ISP
  |        |    \
  |        |      \
Serv2   |         Laptop
           |
          Serv3


Is this your setup?  There is a loop that may be causing the router to suspect IP spoofing.

You might want to think about this setup:

  Serv1
           \                              
             \
              Router---------Cable Modem Router---------------ISP                          
            /
          /
8-port hub
  |        |    \
  |        |      \
Serv2   |         Laptop
           |
          Serv3

0
 
LVL 2

Author Comment

by:zilantyas
ID: 11976462
Thanks!  adamdrayer,

That corrected my problem.  I'm no longer losing internet connectivity.  I plugged both nics of Serv1 into the Router.  Thanks again.
0
 
LVL 15

Expert Comment

by:adamdrayer
ID: 11976475
no problem =)
0

Featured Post

What Security Threats Are You Missing?

Enhance your security with threat intelligence from the web. Get trending threat insights on hackers, exploits, and suspicious IP addresses delivered to your inbox with our free Cyber Daily.

Join & Write a Comment

PRTG Network Monitor lets you monitor your bandwidth usage, so you know who is using up your bandwidth, and what they're using it for.
ADCs have gained traction within the last decade, largely due to increased demand for legacy load balancing appliances to handle more advanced application delivery requirements and improve application performance.
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…

762 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

21 Experts available now in Live!

Get 1:1 Help Now