Hello Julius,
I am missing the information related to the NAT statements you are hitting.
The easy way to do it is to perform a static nat translation from the server to the outside (this will take into consideration both inbound and outbound connections for the same IP).
Otherwise you could use a Policy-Based NAT.
Again I need to see the NAT.
For more information about Core and Security Networking follow my website at http://laguiadelnetworking.com
Any question contact me at jcarvaja@laguiadelnetworking.com
Cheers,
Julio Carvajal Segura
Julio Carvajal
Senior Network Security and Core Specialist
CCIE #42930, 2xCCNP, JNCIP-SEC