ZyXEL Communications ZYWALL 2 WG, User Manual

Page: 266 / 784

Chapter 11 Firewall
ZyWALL 2WG User’s Guide
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The following table describes the labels in this screen.
11.14 My Service Firewall Rule Example
The following Internet firewall rule example allows a hypothetical My Service connection
from the Internet.
1
In the Service screen, click Add to open the Edit Custom Service screen.
Figure 165 My Service Firewall Rule Example: Service
2
Configure it as follows and click Apply .
Table 75 SECURITY > FIREWALL > Service > Add
LABEL DESCRIPTION
Service Name Enter a descriptive name of up to 31 printable ASCII characters (except
Extended ASCII characters) for the custom service. You cannot use the “(“
character. Spaces are allowed.
IP Protocol Choose the IP protocol ( TCP , UDP , TCP/UDP , ICMP or Custom ) that defines
your customized service from the drop down list box.
If you select
Custom , specify the protocol’s number. For example, ICMP is 1,
TCP is 6, UDP is 17 and so on.
Port Range Enter the port number (from 1 to 255) that defines the customized service
To specify one port only, enter the port number in the
From field and enter it
again in the To field.
To specify a span of ports, enter the first port in the From field and enter the last
port in the To field.
Type/Code This field is available only when you select ICMP in the IP Protocol field.
The ICMP messages are identified by their types and in some cases codes.
Enter the type number in the
Type field and select the Code radio button and
enter the code number if any.
Apply Click Apply to save your customized settings and exit this screen.
Cancel Click Cancel to exit this screen without saving.