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Loosing connection with Cable Modem

By kevkha ·
I have two NICs on my Windows Adv. 2K. I'm running DNS and DHCP services. The problem is that most of the time when some one in my organization wants to use the internet from his/her workstation, then cable modem starts loosing its connection. The leds on the modem are jumping around. Sometimes I have to reset the modem by turning it off and on and restart the server. Look like incoming is fine but outgoing is the problem for me. What should I check with my DNS. I thinks it causes the trouble. Thanks in advance.

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Loosing connection with Cable Modem

by pginnega In reply to Loosing connection with C ...

The question you present is a common question, but there are some details that pertain to your question that are unclear. As stated you have two nic cards in a WIN2K ADV server. one nic card should should be configured for DHCP. This card would beconnected to the cable modem.the second nic card would be the gateway toyour local privaite network. In essence you will have two seperate networks. The cablemodem network which is able to talk to the public (internet) and your local private network. Your cable company will provide an IP address, default gateway,and a two DNS servers to resolve FQDNs to IP addresses. too approach this problem Iwould ask this,
1st, are you using NAT? NATwill allow your local PC's to achieve Querying to a Public IP address. The NAT server (Added and Configured in RRAS) recieves the query from a private IP address on you local network. The information given to the NAT database will have the source local IP address and the Destination public IP address. NAT will then mask the source private address and put in the Public address that your cable company provieds to you via the cable modem. This allows the query to be sent to the internet for resolution. The reccieveing party of this request thinks that the source was from your NAT server's public IP address and knows nothing about the local private IP that the qurery origonted from. When the reply comes back to the server running NAT the Server looks at it's NAT database and fowards the request back to the private IP address that sent it.

For this also to take place you will either need to configure your internal nic card on the server as either a DHCP scope or just a plain static. If it is configured as a second DHCP scope you will need to provide the following info, ip start and end adresses,subnet mask, default gateway, DNS and WINS server (WINS is optional).
after you completed your internal network DHCP scope you

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Loosing connection with Cable Modem

by kevkha In reply to Loosing connection with C ...

The question was auto-closed by TechRepublic

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Loosing connection with Cable Modem

by map6551 In reply to Loosing connection with C ...

Does the cable modem lose the connection or does the NIC connected to the cable modem lose the connection. What kind of server hardware do you hvae and what NIC ? I had the same problem with my Win 2k server at home and it was do to my crappy *** nics (get what you pay for) were dropping packets left and right. Just a thought hope it helps
Mark

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Loosing connection with Cable Modem

by kevkha In reply to Loosing connection with C ...

The question was auto-closed by TechRepublic

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Loosing connection with Cable Modem

by kevkha In reply to Loosing connection with C ...

This question was auto closed due to inactivity

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