ZyXEL Communications 2WE 16.5 Predefined Services, DNS, Rule Config, Custom Ports, Available Services, Table 16-2Predefined Services, Table 16-1Firewall Rules Summary: First Screen

	ZyWALL 2 and ZyWALL 2WE
	Table 16-1 Firewall Rules Summary: First Screen
FIELD	DESCRIPTION
Log	This field shows you if a log is created for packets that match the rule (Match), don't
	match the rule (Not Match), both (Both) or no log is created (None).
Alert	This field tells you whether this rule generates an alert (Yes) or not (No) when the
	rule is matched.
Insert	Type the index number for where you want to put a rule. For example, if you type “6”,
	your new rule becomes number 6 and the previous rule 6 (if there is one) becomes
	rule 7.
	Click Insert to display this screen and refer to the following table for information on
	the fields.
Move	Select a rule’s Index option button and type a number for where you want to put that
	rule. Click Move to move the rule to the number that you typed. The ordering of your
	rules is important as they are applied in order of their numbering.
Rule to (Rule	Click a rule's option button and type the number for where you want to put that rule.
Number)
Click Apply to save your changes to the ZyWALL. Click Edit to create or edit a rule. 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)”. (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.

	Table 16-2 Predefined Services
SERVICE	DESCRIPTION
AIM/New-ICQ(TCP:5190)	AOL’s Internet Messenger service, used as a listening port by ICQ.
AUTH(TCP:113)	Authentication protocol used by some servers.
BGP(TCP:179)	Border Gateway Protocol.

Creating Custom Rules 16-7