ZyXEL NSA325 User Guide - Page 175
UPnP Port Mapping Screen, TCP: 21, a.b.c.d - no boot
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Chapter 9 Network Table 28 Network > TCP/IP (continued) LABEL Jumbo Frames DESCRIPTION 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. Network Diagnostic Tool Apply Reset 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. 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. 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. Click this to restore your previously saved settings. 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 192.168.1.20 a.b.c.d TCP: 21 TCP: 21 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. Media Server User's Guide 175