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Forum Discussion

coda6_52611's avatar
coda6_52611
Icon for Nimbostratus rankNimbostratus
May 12, 2010

SMTP, Client IP Preservation and multiple Virtual Servers

I understand that to preserve the source IP address of an SMTP client I need to turn off SNAT and have the gateway of the Exchange servers set to the virtual servers IP.     BUT, I have multipl...
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hoolio's avatar
hoolio
Icon for Cirrostratus rankCirrostratus
May 13, 2010
If you change all of the servers' default gateways to LTM's floating self IP (not any virtual server IP address), this will work so long as there aren't any clients on the same subnet as the servers making requests to the VIPs. If there are any clients on the same subnet as the servers, then you'd need to use SNAT. You could enable SNAT just for those clients using an iRule.

 

 

If this isn't in production yet, try it and see if it works. If it is in production maybe you can create a test VIP and remove one of the servers from the production pool(s) to test it.

 

 

Also, the diagram you uploaded doesn't seem to be attached to the post.

 

 

Aaron