Netgear WNR612 Wireless Router User Manual
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host can have mutually unrestricted communcation with a user or server on the
WAN.
The following table describes parameters in this page:
Field
Description
Disable Port
Scan and
DOS
Protection
This function protects your LAN against DoS attack. Do not
disable this firewall function unless a special situation occurs.
Default DMZ
Server
Enter the IP address of a computer or server that serves as a DMZ
server.
Respond to
Ping on
Internet Port
If you want the router to respond to ping commands from the
Internet, select the check box. The ping command can be used for
diagnosis. Like a DMZ server, this function also leads to security
risks. Hence, do not select the check box unless it is necessary.
Disable IGMP
Proxying
IGMP proxy allows a PC in the LAN to receive certain multicast
traffics from the Internet. If you do not want to use IGMP proxy,
select the check box to disable IGMP proxy.
MTU Size (in
bytes)
The maximum transmission unit. Normally, it is 1500 bytes for
most Ethernet networks, 1492 bytes for PPPoE connection, and
1436 bytes for PPTP connection. Certain ISPs may require
smaller MTU, but this is a rare case. Do not modify the value of
MTU size unless it is necessary for your ISP connection.
NAT Filtering
Determines the mode of the router to handle the input traffics.
Secured
: It provides a secure firewall that protects personal
computers in a LAN against attacks from the Internet.
However, it causes malfunction of certain network games,
point-to-point (P2P) applications, and multimedia applications.
Open
: It provides firewall settings of a lower security level. It
allows running of almost all network applications.
Disable SIP
ALG
Certain SIP applications have special mechanisms of passing
through the NAT firewall and SIP ALG may have conflicts with
these mechanisms. In most cases, you should not disable SIP
ALG.
