Owner's Manual

Ensuring a Secure Dell OpenManage IT Assistant Installation 215
using SNMP, CIM, or IPMI, as configured. Configure the firewall to enable
incoming, as well as outgoing ICMP packets along with the other ports,
as required by the protocol used for discovery.
Features such as software updates, power monitoring, and so on will work
only when additional ports are opened. Table 11-1 lists the IT Assistant ports
to be configured.
Table 11-1. IT Assistant UDP/TCP Default Ports
Port # Protocol Port
Type
Version Maximum
Encryption
Level
Direction Usage Configur
able
22 SSH TCP 7.x 128-bit In/Out IT Assistant
contextual
application
launch—SSH
client
Remote software
updates to Server
Administrator—
for systems
supporting Linux
operating systems
Performance
monitoring in
Linux systems
Yes
23 Telnet TCP 7.x None In/Out IT Assistant
contextual
application
launch—Telnet to
Linux device
No
25 SMTP TCP 7.x None In/Out Optional e-mail
alert action from
IT Assistant
No
68 UDP UDP 7.x None Out Wake-on-LAN Yes