User's Manual

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NAT PassthroughFirewall setup
7-8
3EQ-10280-AAAA-TCZZA
Edition 01 February 2011
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NAT Passthrough
The NAT Passthrough window allows you to enable or disable specific protocols from
passing through the gateway.
Note: This should only be configured with the help of your ISP.
Select NAT Passthrough in the Firewall Setup menu to access the NAT Passthrough
window; see Figure 7-6.
IP Address Enter the IP address of the host that you are
blocking.
IP Netmask Select the subnet mask of the host that you are
blocking.
Protocol Select the type of protocol(s) used by the
application:
TCP
UDP
Both
Port Type Select Dest (destination) or Source depending on
the type of application.
Starting Port Enter the start port of the ports used by the
application.
Ending Port Enter the end port of the ports used by the
application.
Enable Select Enable to apply the filter rule or Disable to
turn off the filter rule.
DSCP Packet Filter Policy Select Disable to disable the DSCP policy. Select
Deny to deny packets that are accessing the Internet
with the specified DSCP value in the IP header or
select Allow to allow packets that are accessing the
Internet with the specified DSCP value in the IP
header.
DSCP Value Enter a DSCP value between 0 and 63.
Apply Changes Click to save your changes.
Field Description