Can mailserver be on Lan?

[billmckinstry]

Just a quick question that may help me setup my new mailserver.

Does a mailserver have to have direct access to WAN or can it be a LAN device with just one NIC ?

We have two WAN access points.
One is an adsl router joined to the switch and all seems fine for internet browsing.

The other is a wireless system with a linksys router joining by way of PPPoE and this appears to connect fine.
This PPPoE is direct to our ISP and where we need to downlod our mail to our pending mailserver.

When the linksys router is also joined to the switch all devices can use either the adsl or linksys to roam the net. 192.168.1.1 linksys & 192.168.1.10 is adsl.

When I join the linksys direct to the mailserver I will then need two NIC's. One for the Linksys and one for the LAN.
This is where the fun has started.

So.... Can I just have one NIC (connected to the switch) on the mailserver??

Can't seem to find info on this basic question.

Plenty of threads about setting up the mailserver but they all appear to assume you already have a connection.

[billmckinstry]

I have attached a schematic of the setup now where the mailserver is attached to the linksys router and it appears to work better as the pc's can ping the mailserver and vis versa.

Any comments - yet to actually get the mailserver to work

[coopstah13]

you only need one network connection

what kind of mail server are you running

[billmckinstry]

Trying to setup a simple and stable mailserver for 3 to 4 users. Am using Centos 5 but it is not staying connected on the internet.
One minute it is on and then I make some changes and it won't go back on even though the same setting are being used.

[coopstah13]

could be faulty hardware or a misconfiguration

if you are using static IP maybe you have address conflict elsewhere on the network

[billmckinstry]

Issue appears to be IPv4 & IPv6 related.
Web access fine last night on IPv4. When IPv6 was enabled web access was not working.
Started server this morning (still just a pc) and no web access. Tested web access by way of pc on network and no problems with router.
Enabled IPv6 and still no web access.
Disabled IPv6 and wala, we have web access but this web access is the same setting that we started off with.
All I did is enable IPv6. save, stop networking, & start networking.
Then disable IPv6, save and we were alive. no need to restart networking.

I did start a thread on what IPv4 & IPv6 is all about.