ZyXEL Communications ZYWALL10 User Manual
ZyWALL 10 Internet Security Gateway
Creating Custom Rules
16-7
FIELD
DESCRIPTION
OPTIONS
Click Apply to create a new firewall rule. New firewall rules are added at the end after existing
firewall rules. Click Edit to edit an existing filter rule. See section 16.5 for more details. Click Delete
to delete an existing firewall rule. Note that subsequent firewall rules move up by one when you take
this action. Click Help for online HTML help on fields in this screen
firewall rules. Click Edit to edit an existing filter rule. See section 16.5 for more details. Click Delete
to delete an existing firewall rule. Note that subsequent firewall rules move up by one when you take
this action. Click Help for online HTML help on fields in this screen
16.5 Predefined Services
The Available Services list box in the Rule Config(uration) screen (see Figure 16-4) displays all predefined
services that the ZyWALL already supports. Next to the name of the service, two fields appear in brackets.
The first field indicates the IP protocol type (TCP, UDP, or ICMP). The second field indicates the IP port
number that defines the service. (Note that there may be more than one IP protocol type. For example, look at
the default configuration labeled “(DNS)”.
services that the ZyWALL already supports. Next to the name of the service, two fields appear in brackets.
The first field indicates the IP protocol type (TCP, UDP, or ICMP). The second field indicates the IP port
number that defines the service. (Note that there may be more than one IP protocol type. For example, look at
the default configuration labeled “(DNS)”.
(UDP/TCP:53)
means UDP port 53 and TCP port 53.Up to 128
entries are supported. Custom services may also be configured using the Custom Ports function discussed
later.
later.