Dell 6.2 manual Understanding Default Open Ports, Port Protocol Where Used Description Number

Predefined Role

Permissions

•show voice call-counters

•show voice client status

•show voice call-quality

•show voice call-density

•show voice call-cdrs

•show voice call-perf

Understanding Default Open Ports

By default, Dell controllers and access points treat ports as untrusted. However, certain ports are open by default only on the trusted side of the network. These open ports are listed in Table 404.

Table 404: Default (Trusted) Open Ports

Port	Protocol	Where Used	Description
Number
17	TCP	controller	This is use for certain types of VPN clients that accept a banner
			(QOTD). During normal operation, this port will only accept a
			connection and immediately close it.
21	TCP	controller
22	TCP	controller	SSH
23	TCP	AP and controller	Telnet is disabled by default but the port is still open.
53	UDP	controller	Internal domain.
67	UDP	AP (and controller	DHCP server.
		if DHCP server is
		configured)
68	UDP	AP (and controller	DHCP client.
		if DHCP server is
		configured)
69	UDP	controller	TFTP
80	TCP	AP and controller	HTTP Used for remote packet capture where the capture is saved
			on the Access Point. Provides access to the WebUI on the
			controller.
123	UDP	controller	NTP
161	UDP	AP and controller	SNMP. Disabled by default.
443	TCP	controller	Used internally for captive portal authentication (HTTPS) and is
			exposed to wireless users. A default self-signed certificate is
			installed in the controller. Users in a production environment are
			urged to install a certificate from a well known CA such as
			Verisign. Self-signed certs are open to man-in-the-middle attacks
			and should only be used for testing.

835 Behavior and Defaults Dell PowerConnect W-Series ArubaOS 6.2 User Guide