ZyXEL Communications NAS540, User Manual

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Chapter 10 Control Panel
Cloud Storage User’s Guide
115
Figure 69
UPnP Using the Wrong IP Address
10.5.2 UPnP and Security
UPnP’s automated nature makes it easier to use than manually configuring firewall and NAT rules,
but it is also less secure. Using UPnP may make your network more susceptible to snooping and
hacking attacks.
10.5.3 The NAS’s Services and UPnP
This section introduces the NAS’s services which an Internet gateway can use UPnP to allow access
to and from the Internet.
CIFS (Windows File Sharing)
Common Internet File System (CIFS) is a standard protocol supported by most operating systems
in order to share files across the network. Using UPnP port mapping for CIFS allows users to
connect from the Internet and use programs like Windows Explorer to access the NAS’s shares to
copy files from the NAS, delete files on the NAS, or upload files to the NAS from the Internet.
If you configure UPnP port mapping to allow CIFS access from the WAN but cannot get it to work,
you may also have to configure the Internet gateway to also allow NetBIOS traffic. See
Section 16.3
on page 205 for more on CIFS.
FTP
File Transfer Protocol is a standard file transfer service used on the Internet. Using UPnP port
mapping for FTP allows remote users to use FTP from the Internet to access the NAS’s shares. A
user with read and write access to a share can copy files from the share, delete files from the share,
or upload files to the share. See
Section 17.4 on page 215 for more on FTP. If you use UPnP to allow
FTP access from the WAN, you may want to use a different WAN port number (instead of the default
of port 21) to make it more secure. Remember to tell the remote users to use the custom port
number when using FTP to access the NAS.
HTTP (Web Configurator)
You can use UPnP port mapping to allow access to the NAS’s management screens. If you use UPnP
to allow web configurator access from the WAN, you may want to use a different WAN port number
(instead of the default of port 80) to make it more secure. Remember to use the custom port
number when accessing the NAS’s web configurator from the Internet.
192.168.1.34
a.b.c.d
192.168.1.33