MOM agents can communicate with the MOM Management Server if the MOM agent computer is behind a firewall. However, you must open TCP port 1270 and UDP port 1270. Additionally, you must manually install and update MOM agents that are behind a firewall. If you cannot enable access to port 1270 through the firewall, you must install a MOM management group inside the perimeter network. You can separately monitor the perimeter network management group. Or, you can enable alert forwarding from the perimeter network management group to the internal MOM management group by using port 1271. If the managed computers belong to the internal domain, the following conditions are true:
- Mutual authentication is available.
- Signed and encrypted communications are available.
If the managed computers belong to a perimeter network domain, the following conditions are true:
- The following ports are open so that the managed computer can authenticate the MOM management domain and communicate with the domain:
- UDP port 53 to support Domain Name System (DNS) queries and dynamic registrations
- UDP port 123 to support Network Time Protocol (NTP)
- TCP port 135 to support remote procedure calls (RPC)
- UDP port 389 and TCP port 389 to support Lightweight Directory Access Protocol (LDAP)
- TCP port 445 to support server message block (SMB)
- All ports over 1024 for RPC communication and for response to dynamic source ports on the MOM agent computer.
- If a full Active Directory directory service trust relationship exists between the Management Server domain and the agent domain, the following options are available:
- Mutual authentication
- Signed and encrypted communications
- If a full Active Directory trust relationship does not exist, only signed and encrypted communications are available. Mutual authentication is not available.
Nov 9, 2005
mom 2005 agent - port requirements
here's some good, general information on mom agent port requirements over a firewall. someone posted this on the msmom mailing list.