ZyXEL Communications P-2302R-P1 - Manual (Page 106)

P2302R-P1 Support Notes
All contents Copyright

2007 ZyXEL Communications Corporation.
106
How does e-mail work through the ZyXEL Device?
It depends on what kind of IP you have: Static or Dynamic. If your company has a domain name, it means that
you have a static IP address. Suppose your company's e-mail address is [email protected]. Joe and Debbie
will be able to send e-mail through the ZyXEL Device Internet Access Sharing Router using
[email protected] and [email protected] respectively as their e-mail addresses. They will be able
to retrieve their individual private and secure e-mail, if they have been assigned the proper access right.
If your company does not have a domain name, it means that your ISP provides you with a dynamic IP address.
Suppose your company's e-mail address is [email protected]. Jane and John will be able to send
e-mail through The ZyXEL Device Internet Access Sharing Router using "jane"<[email protected]>
and "john"<[email protected]> respectively as their e-mail addresses. Again, they will be able to
retrieve their individual private and secured e-mail, if they have been assigned the proper access right.
What is the difference between the 'Standard' and 'RoadRunner' service?
The US Road Runner service requires the user to "log in" to the service before it can send any packets to the
outside network. This is apparently implemented in the TAS (Toshiba Authentication System) with a packet
filtering firewall in the upstream direction. Before login, one can send ICMP packets (e.g., ping) to the outside
Internet, but nearly all other upstream TCP and UDP packets are blocked. The user can only speak to the local
DNS/login server. Downstream packets do not appear to be filtered or blocked at any time.
While Standard service means the cable services which have no login requirement. The ZyXEL Device supports
both Road Runner & Standard services in menu 4 for connecting to cable ISPs.
Is it possible to access a server running behind SUA from the outside Internet? If possible,
how?
Yes, it is possible because The ZyXEL Device delivers the packet to the local server by looking up to a SUA
server table. Therefore, to make a local server accessible to the outside users, the port number and the inside IP
address of the server must be configured in Menu 15 -
SUA Server Setup .
What DHCP capability does the ZyXEL Device support?
The ZyXEL Device supports DHCP client on the WAN port and DHCP server on the LAN port. The ZyXEL
Device's DHCP client allows it to get the Internet IP address from ISP automatically. The ZyXEL Device's
DHCP server allows it to automatically assign IP and DNS addresses to the clients on the local LAN.