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ADSL Router User Manual
Virtual Server – Static DNS
This page allows you to configure DNS mapping between Domain name and IP
address for your local hosts. In case you want to access the local servers with
domain names from the local network, you can configure the mapping informatio
on the page.
HostName.DomainName
：
n
ou can use
address for the domain
Key in the domain name that you
registered at the provider. Y
letters and dash for naming, yet other
characters are not allowed to use for
preventing from making troubles.
IP Address
：
Key in the IP
name to map.
Click Apply to upload your setting.
NAT ALG Configuration
The need for IP address translation arises when a network's internal IP addresse
can
t be used outside the network either for security reasons or because they
s
no are
tion)
devices allows local hosts e
m the outside.
ALG (Application Level Gateway) is a security component that augments a firewall or
LG allows legitimate application data to pass
he
eract with NAT to
te information, modify application specific payload and
get the application running across disparate
s
calls made
through this router. The
ed.
invalid for use outside the network. Use of NAT (Network Address Transla
tly access th on such private networks to transparen
external global Internet and enables access to selective local hosts fro
NAT employed in a computer network. A
through the security checks of the firewall that would have otherwise restricted t
traffic for not meeting its filter criteria. ALG application specific translation agents
allow an application on a host in one address realm to connect to its counterpart
running on a host in different realm transparently. An ALG may int
set up state, use NAT sta
perform whatever else is necessary to
address realms.
Enable VPN ALG:
VPN ALG allows two or more
simultaneous VPN connection
through this router. Check the box to
invoke this function.
Enable SIP ALG:
SIP ALG allows two or more
simultaneous VoIP phone
by VoIP clients
default setting for SIP ALG is enabl
Transparent use of SIP-based devices in a
NAT scenario requires that modifications
be made to the SIP messages. These
modifications are performed by the ALG.
A SIP ALG provides functionality to allow
VoIP traffic to pass both from the private to
public and public to private side of the
firewall when using Network Address
Translation (NAT). The
SIP - ALG inspects
and modifies SIP traffic to allow SIP traffic
to pass through the firewall so that
person-to-person SIP sessions may be
established.
Click Apply to upload your setting.
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