# RAS Enrollment Server
| **ource** | **Destination** | **Protocols** | **Ports** | **Description** |
| -------------------------- | --------------------- | -------------------------------------------------- | -------------------------------------------------- | --------------------------------------------------------------------------------------- |
| RAS Enrollment Server | AD DS controllers | TCP
TCP
TCP,UDP
UDP
| 389, 3268
636, 3269
88
53
| LDAP
LDAPS
Kerberos
DNS
|
| | RAS Connection Broker | TCP
UDP
| 20003
20003
| Settings synchronization and performance counters.
Deny Connection Request
|
| Certificate Authority (CA) | TCP
TCP
| 135
dynamic range
49152 - 65535
| DCOM/RPC ports | |