How to configure RPC dynamic port allocation to work with firewalls”AD communications won’t work via a NAT port translation, such as you can not use DCOM through a NAT firewall that performs address translation e. g. where a consumer connects to digital address 198. 252. 145.
1, which the firewall maps transparently to the server’s actual inner IP address of, say, 192. 100. 81. 101. This is as a result of DCOM stores raw IP addresses in the interface marshaling packets and if the client cannot connect to the tackle specific in the packet, it will not work.