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using two NIC's in one PC

By rawnet81 ·
how do i configure one of my nic's to only handle internet/WAN traffic and the other to handle LAN traffic?

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by DeN inc. In reply to using two NIC's in one PC

why are you doing this??

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How to set up theTwo NIC's

by intellitech In reply to

Configure one NiC with only these protocols:
Internet Protocal(TCP/IP)
Microsoft IPv6 Developer Editon
WPA Security Protocal (IEEE 802.1x) v2.2.0.0 - If you need it, otherwise don't use it.

The other NIC, Use the following:
Clinet For Microsoft Networks
File and Printer Sharing for Microsoft Networks
NWLink IPX/SPX/NetBIOS Compataible Transport Protocol
Of course do the same with your other computers.
So, the one nic is online and not sharing and secure. The other is shared so you can share files and printers with your other systems and is not online, as it will not have the Internet Protocal TCP/IP configured with the share nic.
This way, your network is secured from attack from someone online, and you have the ability to share your files and printers with your other systems.
If you have any other questions that you need answered in regards to this setup. Let me know.
Take Care,
IntelliTech -

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i have the same instance

by pcnet2k1 In reply to

i have two networks...1 is for my internet broadband router...2 is for IP/VPN network,
if i enable both network on my single pc it works fine, i see other computers both sides..however my internet connection drops..
have different ip address...the same subnetmask and different gateway... is their any configuration so that internet will still be active?

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Peer-to-peer network?

by _Christian_ In reply to using two NIC's in one PC

From your question, I deduce that you probably have a peer-to-peer network, rather than a domain based network (in which case the internet connection would have to be on a server, and handled by the server settings).

If I am correct, the only answer is to set up your Internet connected PC as Internet connection sharing.
This would be an option in the "Sharing" tab of the properties of your in Internet side NIC.
One done, you may have to restart that computer, and you will probably need to have that one started before the other from then on, as well as maintained powered as long as any other is in use.
The reason being that it will effectively act as a simplified server for the rest of your network, in the absence of a real server.

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Why a consumer level router

by CG IT In reply to using two NIC's in one PC

If you have a Cable/DSL service, buy a consumer level router for about $60.00 USD retail, will do everything your trying to do with a multihomed box including NAT without having to run the ICS wizard.

To multihome your box for sharing an internet connection, your WAN NIC should be set to get a IP and DNS automatically from your ISP. The LAN NIC should be a private Class different from the WAN NIC and that NIC should hook up to a 10/100 switch. All computers are configured on the same private class IP range and Subnet mask [subnet] with the default gateway the WAN NIC. Then run ICS which will setup NAT for sharing the internet connection on the WAN NIC

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Not quite so simple

by _Christian_ In reply to Why a con ...

Technically, I agree, but those have weak firewall protection if any at all, so all PCs would be on the front line.

His solution (my home solution as well) put one PC only in the front line, so if both (or all if more than 2) have firewalls, the other PC(s) are actually more secure (nothing is perfect, but you can at least try).

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Layered defense

by CG IT In reply to Not quite so simple

Can't argue on topology planning but most security people will agree that a layered approach is the way to go. The router provides the first layer of defense. The perimter defense. A decent consumer level router will provide the basics like block WAN ping, DoS attacks, Synfloods, block PPTP passthrough, blah blah.

Second layer of defense comes with running a firewall on client computers. With Windows XP SP2 firewall or a 3rd party firewall.

Third layer of defense is using basic system stuff like disabling the quest account, disabling telnet services, windows messenger services, using strong passwords, not using the admin account, NTFS file/folder permissions and removing the everyone group.

From what I understand, this was a home user so a layered approach isn't as sophisticated as a company security approach [$$ being the obvious hinderence].

Just my 2 cents. Theres no one right way to establish security.

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If in case of...

by kawarimi In reply to Why a con ...

If just in cast of 1 of the router having hardware failure, can I configure the default gateway of NIC1 to router 1 and NIC2 to router2? And is it possible to have 2 NIC running simultaneosly accessing LAN and WAN so that the bandwith will be double up?

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