Outgoing Mail IP address

Nick Stefanov · Joined: 06 Aug 2007 Posts: 2

Hi,

I am trying to match my reverse DNS entry to my public mail server ip
address. All incoming mail comes in fine to my cluster ip address. However,
outgoing mail uses the active node's ip address (not the cluster ip address),
so in effect I have two possible ip addresses I am sending email from (active
+ passive node). Under the SMTP Server properties in ESM the IP address is
the same as the cluster ip address. Is there a way to match all outgoing
mail to the cluster ip address? Any other suggestions? Thanks.

Nick

Archived from group: microsoft>public>exchange2000>clustering

Simon Walsh · Joined: 05 Aug 2007 Posts: 25

This is by design.
When an Exchange 2003 cluster sends SMTP it is the IP address of the Node
that is used.
You could configure a Front End server to send/recieve all SMTP.

/Simon

"Nick Stefanov" wrote in message @microsoft.com...
> Hi,
>
> I am trying to match my reverse DNS entry to my public mail server ip
> address. All incoming mail comes in fine to my cluster ip address.
> However,
> outgoing mail uses the active node's ip address (not the cluster ip
> address),
> so in effect I have two possible ip addresses I am sending email from
> (active
> + passive node). Under the SMTP Server properties in ESM the IP address
> is
> the same as the cluster ip address. Is there a way to match all outgoing
> mail to the cluster ip address? Any other suggestions? Thanks.
>
> Nick

Nick Stefanov · Joined: 06 Aug 2007 Posts: 2

Did not mention that this is Exchange 2000. Do I need a separate server to
create a Frond End server?

"Simon Walsh" wrote:

> This is by design.
> When an Exchange 2003 cluster sends SMTP it is the IP address of the Node
> that is used.
> You could configure a Front End server to send/recieve all SMTP.
>
> /Simon
>
> "Nick Stefanov" wrote in message
> @microsoft.com...
> > Hi,
> >
> > I am trying to match my reverse DNS entry to my public mail server ip
> > address. All incoming mail comes in fine to my cluster ip address.
> > However,
> > outgoing mail uses the active node's ip address (not the cluster ip
> > address),
> > so in effect I have two possible ip addresses I am sending email from
> > (active
> > + passive node). Under the SMTP Server properties in ESM the IP address
> > is
> > the same as the cluster ip address. Is there a way to match all outgoing
> > mail to the cluster ip address? Any other suggestions? Thanks.
> >
> > Nick
>
>
>

Simon Walsh · Joined: 05 Aug 2007 Posts: 25

It is the exact same behaviour in Exchange 2000. Yes you would need a
seperate server for a Front End.

Does your cluster go out through a Firewall? Can you do some sort of NAT
that would make both the cluster Node IPs appear that they come from the
same external IP address? That may solve your problem.

/Simon

"Nick Stefanov" wrote in message @microsoft.com...
> Did not mention that this is Exchange 2000. Do I need a separate server
> to
> create a Frond End server?
>
> "Simon Walsh" wrote:
>
>> This is by design.
>> When an Exchange 2003 cluster sends SMTP it is the IP address of the Node
>> that is used.
>> You could configure a Front End server to send/recieve all SMTP.
>>
>> /Simon
>>
>> "Nick Stefanov" wrote in message
>> @microsoft.com...
>> > Hi,
>> >
>> > I am trying to match my reverse DNS entry to my public mail server ip
>> > address. All incoming mail comes in fine to my cluster ip address.
>> > However,
>> > outgoing mail uses the active node's ip address (not the cluster ip
>> > address),
>> > so in effect I have two possible ip addresses I am sending email from
>> > (active
>> > + passive node). Under the SMTP Server properties in ESM the IP
>> > address
>> > is
>> > the same as the cluster ip address. Is there a way to match all
>> > outgoing
>> > mail to the cluster ip address? Any other suggestions? Thanks.
>> >
>> > Nick
>>
>>
>>

Steven T · Joined: 05 Aug 2007 Posts: 20

I am having the same problem.
What I did is using the CheckPoint NG to configure NAT so that all traffic
originating from both nodes would tranlate to the public IP of the mail
server.
However, I could not get some low-end firewall(Netscreen 5XP) to do this
kind of settings. Sad

"Nick Stefanov" ¼¶¼g©ó¶l¥ó·s»D:7EA96C7D-677E-46CF-B3FE-C2112FFD7AD1@microsoft.com...
> Hi,
>
> I am trying to match my reverse DNS entry to my public mail server ip
> address. All incoming mail comes in fine to my cluster ip address.
> However,
> outgoing mail uses the active node's ip address (not the cluster ip
> address),
> so in effect I have two possible ip addresses I am sending email from
> (active
> + passive node). Under the SMTP Server properties in ESM the IP address
> is
> the same as the cluster ip address. Is there a way to match all outgoing
> mail to the cluster ip address? Any other suggestions? Thanks.
>
> Nick

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