P-793H v 2 Support Notes
(2) Press the
RESET
button for longer than one second and shorter than
five seconds and release it. If the
POWER
LED begins to blink, the P-
793H v2
‟s wireless auto security function-
OTIST
has been enabled.
(3) Press the
RESET
button for six seconds and release it. If the
POWER
LED begins to blink, the default configuration has been restored and the
P-793H v2 restarts.
9. What is SUA? When should I use SUA?
SUA (Single User Account) is a unique feature supported by P-793H v2
router which allows multiple people to access Internet concurrently for the
cost of a single user account.
When P-793H v2 acts as SUA receives a packet from a local client destined
for the outside Internet, it replaces the source address in the IP packet header
with its own address and the source port in the TCP or UDP header with
another value chosen out of a local pool. It then recomputes the appropriate
header checksums and forwards the packet to the Internet as if it is originated
from P-793H v2 using the IP address assigned by ISP. When reply packets
from the external Internet are received by P-793H v2, the original IP source
address and TCP/UDP source port numbers are written into the destination
fields of the packet (since it is now moving in the opposite direction), the
checksums are recomputed, and the packet is delivered to its true destination.
This is because SUA keeps a table of the IP addresses and port numbers of
the local systems currently using it.
10. What is the difference between SUA and Full Feature NAT?
When you edit a remote node in Web Configurator, Advanced Setup,
Network
->
Remote Node -> Edit,
there will be three options for you:
None
SUA Only
Full Feature
SUA
(Single User Account) in previous ZyNOS versions is a NAT set with 2
rules:
Many-to-One
and
Server
. With SUA, 'visible' servers had to be mapped
to different ports, since the servers share only one global IP.
The P-793H v2 now has
Full Feature NAT
which supports five types of
IP/Port mapping: One to One, Many to One, Many to Many Overload, Many
to Many No Overload and Server. You can make special application when
you select
Full Feature NAT
. For example: With multiple global IP
addresses, multiple severs using the same port (e.g., FTP servers using port
21/20) are allowed on the LAN for outside access.
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