When doing port redirection on a PIX, be sure to add a NAT and Global for the specific inside host so it will match the outside address in your static. I have always needed to do this for inbound traffic to work, even though you don't need it for a regular static. You should add the following:
global (outside) 2 188.8.131.52
nat (inside) 2 10.0.0.204 255.255.255.255 0 0
You may not need the static for the data port if you are running fixup for FTP. I usually do this for redirecting SMTP to a filter and have not tried it for FTP.
Table of ContentsIntroductionVersion HistoryPossible Future
UpdatesDocuments PurposeNAT Operation in ASA 8.3+ SectionsRule Types
Network Object NATTwice NAT / Manual NATRule Types used per SectionNAT
Types used with Twice NAT / Manual NAT and Network Obje...
Table of Contents Introduction:This document describes details on how
NAT-T works. Background: ESP encrypts all critical information,
encapsulating the entire inner TCP/UDP datagram within an ESP header.
ESP is an IP protocol in the same sense that TCP an...