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Forum Discussion

kingmuir_152188's avatar
kingmuir_152188
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May 08, 2014

GTM exchange SMTP..

Quick one, will a GTM device pass through the originator ip address to the relay server by default?

 

BIG-IP DNS

7 Replies

  • Cory_50405's avatar
    Cory_50405
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    May 08, 2014

    No. The DNS query to GTM will be completely independent to the subsequent data connection by the client over SMTP.

     

    • Cory_50405's avatar
      Cory_50405
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      May 08, 2014
      There was another thread about this same issue yesterday: https://devcentral.f5.com/s/feed/0D51T00006j3sF1SAI Unless the SMTP server is configured to route through the LTM to reach the connecting clients, then it won't be able to grab the client IP address due to SNAT on the LTM.
    • kingmuir_152188's avatar
      kingmuir_152188
      Icon for Nimbostratus rankNimbostratus
      May 08, 2014
      Bit confused, so the only way to get smtp relay load balanced is to set it up on the ltm layer then set Source Address Translation to none and add a route from the relay box back to the ltm? Wanted to try just use the GTM layer?