It depends what type of database, for example we have sql database, for apps to talk to sql database servers needing to cross firewall I opened tcp port 1433 which is the SQL tcp ports needed for client apps or servers needing to talk to sql database server.. basically you need to find out what database is that you are running and what are their required tcp ports to be opened in firewalls.
Basically, you need to understand what flows in your network and how.
If you collect certain details and study of your application and DB software to understand their connection initiation and necessity, it will give you a better picture of flow map with port numbers.
Then according to this prepare access list on both interfaces. Ports you need to open will depend on the application and DB software, not really on the OS type unless they have any independent communication requirement outside of the app and DB. While placing access lists you can always put a permit line between those two subnets and then deny any to any line.
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...