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General software and network General OS-independent software and network questions, X11, MTA, routing, etc.

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Old 28th November 2008
satimis satimis is offline
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Join Date: May 2008
Posts: 27
Default Networking on virtual machine

Hi folks,

Host - Debian Etch Workstation
Guest01 - mail server for routing
Guest02 - mail server, hostname01. localIP01, domain01
Guest03 - mail server, hostname02, localIP02, domain02
Guest04 - mail server, hostname03, localIP02, domain03

all mail servers running postfix as MTA on Debian Etch.

single (one) external IP with all ports forwarded to Guest01 except port 53 which is forwarded to the DNS server, also running on a guest of the Xen box.

Guest01 routes all incoming mails according to their domains to respective mail servers. All outgoing mails are sent via the routing mail server, Guest01, to Internet.

The system is working nicely on Intranet. Mail client, Evolution, on workstations connected to local network, the Intranet, can send/receive mails on the mail servers. Server settings on mail client work on either local IP or on hostname.

My question is if the workstation is on remote site, not on local network. What will be the server settings on the mail client. If on external IP how can the remote mail client find the mail server which it needs to connect. Please shed me some light. TIA

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