NETGEAR WNR612 User Manual page 84

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