User's Manual

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NAT PassthroughFirewall Setup
8-8
3EQ-10422-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.
Select NAT Passthrough in the Firewall Setup menu to access the NAT Passthrough
window; see Figure 8-6.
IP Address Enter the IP address of the host that you are
blocking.
IP Netmask Select the Netmask of the host that you are blocking.
Protocol Select the type protocol(s) used by this application:
• TCP
• UDP
• Both
Port Type Select Dest (destination) or Source depending on
the type of application.
Starting Port
Ending Port
Enter the range of the ports used by this application.
Enable Select Enable to apply this filter rule or Disable to
turn off this filter rule.
DSCP Policy Select Disable Filter to disable the DSCP policy.
Select Deny to deny packets that are accessing the
Internet with the specified DSCP value in IP header
or select Allow to allow packets that are accessing
the Internet with the specified DSCP value in IP
header.
DSCP Value Enter a DSCP value between 0 and 63.
Apply Changes Click to save your changes.
Field Description