Dynamic Dns - ZyXEL Communications ZYWALL P1 User Manual

Chapter 8 WAN Screens
Table 36 NETWORK > WAN > WAN (PPTP Encapsulation) (continued)
LABEL
RIP Version
Enable Multicast
Multicast Version
Spoof WAN MAC
Address
Clone the
computer's MAC
address – IP
Address
Apply
Reset

8.7 Dynamic DNS

Dynamic Domain Name System (Dynamic DNS or DDNS) allows you to update your current
dynamic IP address with one or many dynamic DNS services so that anyone can contact you
(in NetMeeting, CU-SeeMe, etc.). You can also access your FTP server or Web site on your
own computer using a domain name (for instance myhost.dhs.org, where myhost is a name of
your choice) that will never change instead of using an IP address that changes each time you
reconnect. Your friends or relatives will always be able to call you even if they don't know
your IP address.
First of all, you need to have registered a dynamic DNS account with www.dyndns.org. This is
for people with a dynamic IP from their ISP or DHCP server that would still like to have a
domain name. The Dynamic DNS service provider will give you a password or key.
136
DESCRIPTION
The RIP Version field controls the format and the broadcasting method of the RIP
packets that the ZyWALL sends (it recognizes both formats when receiving).
Choose RIP-1, RIP-2B or RIP-2M.
RIP-1 is universally supported; but RIP-2 carries more information. RIP-1 is
probably adequate for most networks, unless you have an unusual network
topology. Both RIP-2B and RIP-2M sends the routing data in RIP-2 format; the
difference being that RIP-2B uses subnet broadcasting while RIP-2M uses
multicasting. Multicasting can reduce the load on non-router machines since they
generally do not listen to the RIP multicast address and so will not receive the RIP
packets. However, if one router uses multicasting, then all routers on your
network must use multicasting, also. By default, the RIP Version field is set to
RIP-1.
Select this check box to turn on IGMP (Internet Group Multicast Protocol). IGMP
is a network-layer protocol used to establish membership in a Multicast group - it
is not used to carry user data.
Choose None (default), IGMP-V1 or IGMP-V2. IGMP (Internet Group Multicast
Protocol) is a session-layer protocol used to establish membership in a Multicast
group – it is not used to carry user data. IGMP version 2 (RFC 2236) is an
improvement over version 1 (RFC 1112) but IGMP version 1 is still in wide use. If
you would like to read more detailed information about interoperability between
IGMP version 2 and version 1, please see sections 4 and 5 of RFC 2236.
You can use the factory assigned default MAC Address or cloning the MAC
address from a computer on your LAN.
Otherwise, select the check box next to Spoof WAN MAC Address and enter the
IP address of the computer on the LAN whose MAC you are cloning. Once it is
successfully configured, the address will be copied to the rom file (ZyNOS
configuration file). It will not change unless you change the setting or upload a
different ROM file.
Enter the IP address of the computer on the LAN whose MAC you are cloning.
It is recommended that you clone the MAC address prior to hooking up the WAN
port.
Click Apply to save your changes back to the ZyWALL.
Click Reset to begin configuring this screen afresh.
ZyWALL P1 User's Guide