User's Manual

Chapter 9 Network
Media Server User’s Guide
175
9.5 UPnP Port Mapping Screen
Use UPnP (Universal Plug and Play) port mapping to allow access from the WAN to services you
select on the NSA. It is recommended that you place the NSA behind an Internet gateway firewall
device to protect the NSA from attacks from the Internet (see RAID and Data Protection on page
169 for firewall type suggestions). Many such Internet gateways use UPnP to simplify peer-to-peer
network connectivity between devices. UPnP can automatically configure the Internet gateway’s
firewall and Network Address Translation (NAT) to allow access to the NSA from the Internet.
Figure 81 UPnP for FTP Access
In the above example, UPnP creates a firewall rule and NAT port forwarding mapping to send FTP
traffic (using TCP port number 21) from the public IP address a.b.c.d to the NSA’s private IP
address of 192.168.1.20.
Use the NSA’s UPnP Port Mapping screen to configure the UPnP settings your Internet gateway
uses to allow access from the WAN (Internet) to services you select on the NSA. You can also set
which port Internet users need to use in order to access a specific service on the NSA.
Note: To use UPnP port mapping, your Internet gateway must have UPnP enabled.
Jumbo Frames Jumbo frames improve network performance. You must have a 1 Gbps (Gigabit
Ethernet) network that supports jumbo frames. Select the largest size of frame that all
of your network devices (including computer Ethernet cards and switches, hubs, or
routers) support.
When enabled, you can choose between 4 KB, 8 KB, and 9 KB frame sizes.
Note: If you enable jumbo frames on the NSA in a network that does not support them,
you will lose access to the NSA. If this occurs, you will have to restore the factory
default configuration. Push the RESET button on the NSA’s rear panel and
release it after you hear a beep.
Network Diagnostic
Tool
Use this section to test the network connection to a particular IP address or domain
name. Select an address or type it into the field. Then click Ping to have the NSA send
a packet to test the network connection.
• Successfully pinged host - The NSA is able to “ping” the host, the network
connection is OK.
• Unable to ping host - The NSA is able to “ping” the selected host.
Apply Click this to save your TCP/IP configurations. After you click Apply, the NSA restarts.
Wait until you see the Login screen or until the NSA fully boots and then use the NAS
Starter Utility to rediscover it.
Reset Click this to restore your previously saved settings.
Table 28 Network > TCP/IP (continued)
LABEL DESCRIPTION
TCP: 21
TCP: 21
192.168.1.20
a.b.c.d