Reference Guide

Login security settings
Failed login behavior
DellEMC System Update (DSU) populate failed login message on console for wrong credential. For more information about failed
login behavior of DSU, see the Dell EMC System Update User's Guide at dell.com/support
Remote connection security
Dell EMC System Update uses open source library for remote connection using SSH and WMI and it does not log the credentials
mentioned for connections.
User and credential management
Dell EMC System Update supports HTTPS and HTTP connections.
Network security
Dell System Update uses a pre-configured firewall to enhance security by restricting inbound and outbound network traffic to
the TCP and UDP ports. The tables in this section lists the inbound and outbound ports that Dell System Update uses.
Network exposure
Dell System Update uses inbound and outbound ports when communicating with remote systems.
Outbound ports
Outbound ports can be used by Dell System Update when connecting to a remote system..
The ports that are listed in the following table are the Dell System Update outbound ports.
Table 3. Outbound ports
Port number Layer 4 Protocol Service
7 TCP, UDP ECHO
22 TCP SSH
25 TCP SMTP
53 UDP, TCP DNS
67,68 TCP DHCP
80 TCP HTTP
88 TCP, UDP Kerberos
111 TCP, UDP ONC RPC
123 TCP, UDP NTP
161-163 TCP, UDP SNMP
389 TCP, UDP LDAP
443 TCP HTTPS
10 Product and Subsystem Security