2 IP, 2 eth, 1 computer

[virgil66ro]

Is this posible?

I have 1 cable modem, and 1 server. I need 2 static IP: 1 for my domain, and 1 to be used only for sending mail.

Can it be done? How can it be done?
Please help me.

thank's

[Dolda2000]

If you mean that you want to have to IP addresses that are accessible from the internet at large, then you'll have to negotiate it with your ISP.

[virgil66ro]

Hi,

I already talked with my ISP, and he already reserved me the second IP. The question is:

What can I use this second IP?
I have only one server, 1 cable modem, and 2 ethernet card. What shall I must buy?

Or, Can I configure somehow my server?

Thank's

[Dolda2000]

I see. Then, it all depends on how you want to use the IP address. Would you mind describing it a bit more in detail, as well as the physical setup?

[sarumont]

As far as getting them both online, all you need is a switch or hub. This will plug into the cable modem and give you at least 4 more ports for other computers. You would then plug both your NICs into two of these ports and voila!

[lordnothing]

actually, my mom works for the cable company and said that a cable modem *can* pull two IP addresses.. how you obtain and use the second one is up to you to figure out.. i think sarumont is right in saying that you need a hub or switch.. i think maybe even a router would work.. just as long as you could get both ethernet cards connected to the cable modem.

[sarumont]

A router would, though, give both NICs the same IP address as viewed by the Internet, though they would have different internal addresses.

[Dolda2000]

Only a NAT router. If you configure a Linux router it could route all the packets through unmodified, like most routers on the internet do.

[Opnosforatou]

Is this posible?

I have 1 cable modem, and 1 server. I need 2 static IP: 1 for my domain, and 1 to be used only for sending mail.

Can it be done? How can it be done?
Please help me.

Yes,

Depends on what you want; Do you want a dedicated server running as firewall between your own network and the internet ?

What you will have here is a Linux machine that functions as mail router, firewall and if you like, WWW host.
Make sure U enable package forwarding and activate IPTables BEFORE starting you connection to the 'big bad' internet.

A small drawing.

'Big Internet' --<-->---- [ Router/Firewall ] --<--->--- [ Linux Machine with Firewall, Email, etc ] --<-->--- [ Internal Network ]


To enable this u will need the following.

1) Switch/Hub. (4+ ports)
2) Two NIC's for Linux firewall and then a NIC for each computer on the internal network.
3) Enough cable to connect them all.
4) A Linux Distro.
5) A Router, in this case you Cable Modem.


Are you sure about the second IP on you Cable connection ?????
Not many providers allow this.... As fas as I know...

[virgil66ro]

I am sorry, but it seems I can' explain well what I want.

I want that both static IP to be gestionated by the same computer.

Can this be done?