Routing From One Private LAN to Another Private Lan

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I am installing a LAN with private IP address's. We will call this LAN 1 It has a router that is connected to another LAN we will call LAN 2 I need to send email from a single machine on LAN 1 to a server on LAN 2. The IP address's on lAN 1 are all nailed. The address on LAN 2 are all DHCP assigned, but have a domain server. How can I send email from LAN 1 to the server on LAN 2, so people on LAN 2 will recieve the email. Thanks
ASKED: May 3, 2007  1:18 PM
UPDATED: May 3, 2007  7:20 PM

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Aside from my personal opinion that all fixed assets like servers, printers and such should have static IP addresses…

I’m assuming that you’re using Dynamic DNS. Have you first resolved all DNS issues with respect to domains, MX records, server name config on the client machines and such?

From what I’ve heard, Dynamic addressing of servers can be made to work, but you’re asking for trouble if you try that.

Write back with more details of the setup. (To the group, not just to me)

Bob

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  • Asterof
    I'm assuming that you're using Dynamic DNS. Have you first resolved all DNS issues with respect to domains, MX records, server name config on the client machines and such? Yes on LAN 2 Dynamic DNS is being used on LAN 2 There is no DNS on LAN 1, because It has only industrial equipment, no real users. Only one real computer is setting on LAN 1 all the other IP address's are actualy machine devices that the computer is collecting data from. The computer is running a SMTP program that sends collected data in the form of an email to users on LAN 2. It is not currently all finished, and I want to be sure all the networking issues are settled before we put the system online.
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  • Bobkberg
    At the risk of repeating myself, DNS and Mail servers really should have fixed IP addresses. Dynamic DNS and DHCP is ok for client machines, but not servers. Best way to test that is to put a laptop (or other PC) on the "industrial LAN" with the IP address that you plan to use for the "mailing" machine, and then open a command prompt (DOS window) and telnet to port 25 on the intended receiver. However - given the additional information you've provided, I'd actually recommend solving the entire problem a different way. If possible, have the industrial machine FTP its data to a server, and use a filename built out of the date and time that it's being sent. A simple PERL script in combination with a Batch file should do this quite nicely, and simplify the whole operation. Good luck, Bob
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