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SMTP traffic direction

I have a small problem I need an answer to.

Basically I have an Astargo ASG220 ( V7.505)

with 2 adsl lines attached for uplink balancing.
On the other side of the unit (intenal) I have an exchange server on ip range 192.168.x.x
as well as my internal network.

My question is how do I ensure that the smtp traffic always leaves the astaro via the correct adsl line.

This setup works most of the time unless I do a reboot and then the SMTP traffic starts to go out which ever line re enables first. I want to force the SMTP traffic only to use 1 now matter what.

The mail still gets through on either line but obviously when the receiving server does a reverse DNS it does not match and the email is rejected.

Thanks in advance

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0 BAlfson over 15 years ago

I have a couple ideas, but I think you should submit a support ticket to Astaro - they'll probably think this is undesireable behavior that they want to change.

Cheers - Bob
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0 BAlfson over 15 years ago

I have a couple ideas, but I think you should submit a support ticket to Astaro - they'll probably think this is undesireable behavior that they want to change.

Cheers - Bob
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0 roddy100 over 15 years ago in reply to BAlfson

Thanks for the reply

I imagined it would be something simple like

Creating a packet filter rule as below

Source - Exchange Server
Service - SMTP
Destination - External1
Action - Allow

I thought this would have worked until the problem resurfaced after a reboot yesterday. if I put the opposite rule on the other line will that have any effect ie

Source - Exchange Server
Service - SMTP
Destination - External2
Action - Reject
Thus forcing the issue

What are your thoughts ?
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