> Well ... if you have an SMTP server on a LAN ("local") host, running an
> SMTP relay on the firewall/router is probably unnecessary. What you can do
> (this is what I do here) is DNAT (port forward) traffic coming to port 25
> on the router's external interface to port 25 on the existing SMTP server.
> Then you can run your greylist and virus checking on that server.
i got a windows 2000 with exchange as the mail server,
so i dont like to keep it as the SMTP coz of the virus. so i think its better to have
a vires wall with the SMTP on the firewall.
> As to outgoing SMTP traffic, there is no need to "relay" it from the LAN
> SMTP server. Ordinary NATing will handle outgoing SMTP traffic from that
> server
load is really on the mail server so we need a relay to take the load off the server.
(mail server)
On Mon, 19 Jul 2004 12:11:20 -0700
Ray Olszewski <[EMAIL PROTECTED]> wrote:
> At 12:08 AM 7/20/2004 +0600, Kev wrote:
> >Hi Ray...
> >
> >Thanks agane for the reply,
> >
> >Relay mean to relay mail to my local email server that will be running
> >behind the gateway box. and to relay the email from the email server to
> >the internet as a smart host.
>
> Well ... if you have an SMTP server on a LAN ("local") host, running an
> SMTP relay on the firewall/router is probably unnecessary. What you can do
> (this is what I do here) is DNAT (port forward) traffic coming to port 25
> on the router's external interface to port 25 on the existing SMTP server.
> Then you can run your greylist and virus checking on that server. This
> approach minimizes the amount of stuff you have running on the
> firewall/router, always a good idea from a security standpoint.
>
> As to outgoing SMTP traffic, there is no need to "relay" it from the LAN
> SMTP server. Ordinary NATing will handle outgoing SMTP traffic from that
> server (unless you have unusual requirments imposed by your ISP ... but if
> you do, you won't get intelligent advice about how to cope with them unless
> you mention them).
>
>
>
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