Josh Smith shows how you can enable MSDTC in a buttoned-down environment:
This is just a fancy way of saying you need to be better friends with who ever is managing your enterprise firewall. I hadn’t had to touch the DTC until a recent vendor insisted their application wouldn’t work without it (despite their only having a single data store). The MSDTC was developed to coordinate transactions that would span multiple machines and was originally introduced in SQL Server 2000.
In theory it’s not super complicated: just enable the DTC service/communication on the servers in question and turn on some built in firewall rules on the servers right? Almost.
Read on for the full set of instructions.