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Chapter 10 WAN
NBG6617 User’s Guide
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The following table describes the labels in this screen.
10.6 Dynamic DNS Screen
To change your NBG6617’s DDNS, click Expert Mode > WAN > Dynamic DNS. The screen
appears as shown.
Table 24 Expert Mode > WAN > NAT > Passthrough
LABEL DESCRIPTION
ALG Setup
FTP Select Enable to allow TCP packets with a specified port destination to pass through.
H.323 Select Enable to allow peer-to-peer H.323 calls.
SIP Select Enable to make sure SIP (VoIP) works correctly with port-forwarding and
address-mapping rules.
SNMP Select Enable to allow a manager station to manage and monitor the NBG6617 through
the network via SNMP.
RTSP RTSP (Real Time Streaming Protocol) is a protocol used to stop, pause or play video and
audio applications streaming on the Internet.
Select Enable to have the NBG6617 detect RTSP traffic and help build RTSP sessions
through its NAT.
IRC Select Enable to allow clients to communicate in the form of text.
VPN Passthrough
PPTP Select Enable to allow VPN clients to make outbound PPTP connections. It is required in
order to connect to a PPTP VPN account. If PPTP is disabled, then when a client sends a
request to a VPN server, the server will reply to the NBG6617 and the NBG6617 will drop
the request. When PPTP is enabled, the NBG6617 will forward the reply from the VPN
server to the client that initiated the request, and the connection will establish
successfully.
L2TP Select Enable to allow VPN clients to make outbound L2TP connections. It is required in
order to connect to a L2TP VPN account. If L2TP is disabled, then when a client sends a
request to a VPN server, the server will reply to the NBG6617 and the NBG6617 will drop
the request. When L2TP is enabled, the NBG6617 will forward the reply from the VPN
server to the client that initiated the request, and the connection will establish
successfully.
IPSEC Select Enable to allow VPN clients to make outbound IPSec connections. It is required in
order to connect to a IPSec VPN account. If IPSEC is disabled, then when a client sends
a request to a VPN server, the server will reply to the NBG6617 and the NBG6617 will
drop the request. When IPSEC is enabled, the NBG6617 will forward the reply from the
VPN server to the client that initiated the request, and the connection will establish
successfully.
Apply Click Apply to save your changes back to the NBG6617.
Cancel Click Cancel to begin configuring this screen afresh.
78


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