ZyXEL p-2302hwdl-p1 用户手册

Prestige 2302 Support Notes

What is DDNS wildcard?

Some DDNS servers support the wildcard feature which allows the *.yourhost.dyndns.org hostname to be

mapped to the same IP address as yourhost.dyndns.org. This feature is useful when there are multiple internal

servers and you want users to be able to use addresses such as www.yourhost.dyndns.org and still reach your

server.

Yes. the Prestige supports DDNS wildcard that

supports. To use wildcard, simply enter

yourhost.dyndns.org in the Host field in SMT menu 1.1.

Can VPN tunnels still work on a Prestige using SUA?

Yes, the Prestige's SUA still works in IPsec ESP Tunneling mode. When packets go through the Prestige, SUA

will translate the source IP address and source port for the host. To forward IPsec packets, the Prestige SUA can

identify ESP packets with a protocol number of 50. Thus SUA will replace the source IP address of the IPsec

packet with the router's WAN IP address. However, SUA will not change the source port of the UDP packets

which are used for key managements. Since the remote gateway checks the actual source port during connection

negotiation, SUA should not change the original source port.

For outgoing IPsec tunnels, no extra setting is required. To forward packets through the inbound IPsec ESP

tunnel, you must configure the 'Default' server set in SMT menu 15. It is because SUA makes your LAN appear

as a single device to the outside world. LAN users are invisible to outside users. So, to make an internal server

accessible from the outside, you must specify the service port and the LAN IP address of the internal server in

SMT menu 15. Thus Prestige is able to forward incoming packets to the requested service behind SUA and the

outside users can access the server using the Prestige's WAN IP address. You must configure the internal IPSec

gateway as the default server (unspecified service port) in SMT menu 15.

VoIP FAQ

What is Voice over IP?

Voice over IP (VoIP) is an emerging technology based on the open IEEE standards. VoIP refers to the

transmission of voice data over the Internet. Various protocols are available for voice transport. The most

commonly used are SIP and H.323.