Administrator Guide

712 | External Firewall Configuration Dell Networking W-Series ArubaOS 6.4.x| User Guide
l TFTP (UDP port 69) all APs, if there is no local image on the AP (for example, a new AP) the AP will use TFTP
to retrieve the initial image.
l SYSLOG (UDP port 514)
l PAPI (UDP port 8211)
l GRE (protocol 47)
l Control Plane Security (CPSec) uses UDP port 4500
Communication Between Remote APs and the Controller
Configure the following ports to enable communication between a Remote AP (IPSec) and a controller:
l NAT-T (UDP port 4500)
l TFTP (UDP port 69)
TFTP is not needed for normal operation. If the remote AP loses its local image for any reason, it will use TFTP to
download the latest image.
Enabling Network Access
This section describes the network ports that need to be configured on the firewall to manage the Dell
network.
For WebUI access between the network administrator’s computer (running a Web browser) and a controller:
l HTTP (TCP ports 80 and 8888) or HTTPS (TCP ports 443 and 4343).
l SSH (TCP port 22 or TELNET (TCP port 23).
Ports Used for Virtual Internet Access (VIA)
The following ports are used with Dell VIA.
l For the reachability/trusted network check use port 443
l For the IPSec connection use port 4500
l To allow ISAKMP use port 500
Configuring Ports to Allow Other Traffic Types
This section describes the network ports that need to be configured on the firewall to allow other types of
traffic in the Dell network. You should only allow traffic as needed from these ports.
l For logging: SYSLOG (UDP port 514) between the controller and syslog servers.
l For software upgrade or retrieving system logs: TFTP (UDP port 69) or FTP (TCP ports 21 and 22) between
the controller and a software distribution server.
l If the controller is a PPTP VPN server, allow PPTP (UDP port 1723) and GRE (protocol 47) to the controller.
l If the controller is an L2TP VPN server, allow NAT-T (UDP port 4500), ISAKMP (UDP port 500) and ESP
(protocol 50) to the controller.
l If a third-party network management system is used, allow SNMP (UDP ports 161 and 162) between the
network management system and all controllers.
l For authentication with a RADIUS server: RADIUS (typically, UDP ports 1812 and 813, or 1645 and 1646)
between the controller and the RADIUS server.