Netgear 10300143 사용자 설명서
Chapter 3. Content Filtering and Firewall Rules
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Wireless Cable Modem Gateway CG2003D User Manual
Port Forwarding and Port Blocking
A firewall has two default rules, one for inbound traffic (WAN to LAN) and one for outbound
traffic.
traffic.
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Inbound Rules (Port Forwarding)
These rules restrict access from outsiders. The default rule is to block all access from
outside except responses to requests from the LAN side. You can use port forwarding to
add predefined or custom rules to specify exceptions to the default rule.
outside except responses to requests from the LAN side. You can use port forwarding to
add predefined or custom rules to specify exceptions to the default rule.
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Outbound Rules (Port Blocking)
These rules control access to outside resources from local users.The default rule is to
allow all access from the LAN side to the outside. You can use port blocking to add
predefined or custom rules to specify exceptions to the default rules.
allow all access from the LAN side to the outside. You can use port blocking to add
predefined or custom rules to specify exceptions to the default rules.
Set Up Port Blocking
You can use port blocking to block outbound traffic on specific ports.
Note:
Any outbound traffic that is not blocked by rules that you have
created is allowed by the default rule.
To configure port blocking and services to block specific outbound traffic:
1.
Select Advanced > Port Blocking. The Port Blocking screen displays.
2.
Under Add Predefined Service, select a predefined service from the Service field. (For
example, FTP, which uses TCP ports 20 and 21.)