External
Filters
Configuration
• Block Selected ICMP Types –This acts as "master" switch. If checked, the
selected packet types are blocked. Otherwise, they are accepted.
DNS
Loopback When you have some servers on LAN and their domain names have already
registered on public DNS. To avoid DNS loopback problem, please enter the
following fields.
• Domain Name – Enter the domain name specified by you for local
host/server.
• Private IP – Enter the private IP address of your local host/server.
Application • IDENT Port – Port 113 is associated with the Internet's (Identification /
Authentication) service. This port (port 113) provides a means of determining
the identity of a user on a particular TCP connection. By default the device is
stealth for this port. Enable to make this port closed, not stealth.
• SMTP Binding –To determine if the SMTP packets are bound on the WAN
port.
• IPSec Passthrough – To determine if the VPN client can make a tunnel
established with remote side VPN host.
• PPTP Passthrough – To determine if PPTP client can connect to remote side
PPTP server via the device.
Protocol &
Port Binding
• Enable – To activate or deactivate the current rule.
• Source IP –The IP address that the packet's source IP will be checked
against.
• Destination IP / IP Address –The specific IP range that the packet's
destination IP will be checked against.
There are two forms of Destination IP: If Subnet is selected, the IP Address
and Subnet Mask fields need to be filled. If IP Range is selected, the From and
To fields need to be filled.
• Protocol –The protocol that the packet's protocol will be checked against.
• Port Range –The specific port number range that the packet's destination
port number will be checked against.
• WAN –The specific WAN port that the packet will be bound on if all the
checked items are met.
Protocol &
Port Binding
List
The List shows NAT Alias that is currently defined.
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