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John_Ogle_45372's avatar
John_Ogle_45372
Icon for Nimbostratus rankNimbostratus
Aug 28, 2013

NAT bidirectional question / issue

I have two smtp servers that use the LTM as their default gateway. Snat is disabled on the virtual server. I also have a NAT entry for these two servers for management purposes. This works. The problem is outbound...

 

When the server attempts to go outbound, it uses the external vlan floater ip as the source address and not the NAT address. Why isn't the NAT address being used? How can I make it use the NAT address to make it bidirectional? Options?

 

Thank you,

 

deployment

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  • nitass's avatar
    nitass
    Icon for Employee rankEmployee
    Aug 28, 2013

    is this relevant?

     

    sol9039: A virtual server with a SNAT pool takes precedence over matching the NAT

     

    http://support.f5.com/kb/en-us/solutions/public/9000/000/sol9039.html

     

  • John_Ogle_45372's avatar
    John_Ogle_45372
    Icon for Nimbostratus rankNimbostratus
    Aug 28, 2013

    It may be. I believe the article is saying, that because the 0.0.0.0 outbound vs is in place (with automap), this is the reason for the floater ip being used as the source address, correct?

     

    That still leaves me with no option for using the NAT entry in a bi-directional manner. You can't create a an additoinal SNAT entry for the outbound traffic because the origin ip address already in use with the NAT entry. Thoughts? Options?

     

  • nitass's avatar
    nitass
    Icon for Employee rankEmployee
    Aug 29, 2013

    That still leaves me with no option for using the NAT entry in a bi-directional manner. You can't create a an additoinal SNAT entry for the outbound traffic because the origin ip address already in use with the NAT entry. Thoughts? Options?

     

    have you tried to use snat and nat (i.e. not using virtual server) for outbound traffic?