Zyxel ZyWALL-USG50 Router Manual PDF (Setup & Configuration Guide)

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Chapter 36 Addresses

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601

36.2.1

Address Add/Edit Screen

The

Configuration > Address Add/Edit

screen allows you to create a new

address or edit an existing one. To access this screen, go to the

Address

screen

(see

Section 36.2 on page 599

), and click either the

Add

icon or an

Edit

icon.

Figure 344

Configuration > Object > Address > Address > Edit

The following table describes the labels in this screen.

Table 180

Configuration > Object > Address > Address > Edit

LABEL

DESCRIPTION

Name

Type the name used to refer to the address. You may use 1-31

alphanumeric characters, underscores(

_

), or dashes (-), but the first

character cannot be a number. This value is case-sensitive.

Address Type

Select the type of address you want to create. Choices are:

HOST

,

RANGE

,

SUBNET

,

INTERFACE IP

,

INTERFACE SUBNET

, and

INTERFACE GATEWAY

.

Note: The ZyWALL automatically updates address objects that are

based on an interface’s IP address, subnet, or gateway if the

interface’s IP address settings change. For example, if you

change ge1’s IP address, the ZyWALL automatically updates

the corresponding interface-based, LAN subnet address

object.

IP Address

This field is only available if the

Address Type

is

HOST

. This field

cannot be blank. Enter the IP address that this address object

represents.

Starting IP

Address

This field is only available if the

Address Type

is

RANGE

. This field

cannot be blank. Enter the beginning of the range of IP addresses that

this address object represents.

Ending IP

Address

This field is only available if the

Address Type

is

RANGE

. This field

cannot be blank. Enter the end of the range of IP address that this

address object represents.

Network

This field is only available if the

Address Type

is

SUBNET

, in which case

this field cannot be blank. Enter the IP address of the network that this

address object represents.

Netmask

This field is only available if the

Address Type

is

SUBNET

, in which case

this field cannot be blank. Enter the subnet mask of the network that

this address object represents. Use dotted decimal format.

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36.3

Address Group Summary Screen

The

Address Group

screen provides a summary of all address groups. To access

this screen, click

Configuration > Object

>

Address > Address Group

. Click a

column’s heading cell to sort the table entries by that column’s criteria. Click the

heading cell again to reverse the sort order.

Figure 345

Configuration > Object > Address > Address Group

The following table describes the labels in this screen. See

Section 36.3.1 on page

603

for more information as well.

Interface

If you selected

INTERFACE IP

,

INTERFACE SUBNET

, or

INTERFACE

GATEWAY

as the

Address Type

, use this field to select the interface of

the network that this address object represents.

OK

Click

OK

to save your changes back to the ZyWALL.

Cancel

Click

Cancel

to exit this screen without saving your changes.

Table 180

Configuration > Object > Address > Address > Edit (continued)

LABEL

DESCRIPTION

Table 181

Configuration > Object > Address > Address Group

LABEL

DESCRIPTION

Add

Click this to create a new entry.

Edit

Double-click an entry or select it and click

Edit

to be able to modify the

entry’s settings.

Remove

To remove an entry, select it and click

Remove

. The ZyWALL confirms

you want to remove it before doing so.

Object

References

Select an entry and click

Object Reference

s to open a screen that

shows which settings use the entry. See

Section 11.3.2 on page 230

for

an example.

#

This field is a sequential value, and it is not associated with a specific

address group.

Name

This field displays the name of each address group.

Description

This field displays the description of each address group, if any.

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Chapter 36 Addresses

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36.3.1

Address Group Add/Edit Screen

The

Address Group Add/Edit

screen allows you to create a new address group

or edit an existing one. To access this screen, go to the

Address Group

screen

(see

Section 36.3 on page 602

), and click either the

Add

icon or an

Edit

icon.

Figure 346

Configuration > Object > Address > Address Group > Add

The following table describes the labels in this screen.

Table 182

Configuration > Object > Address > Address Group > Add

LABEL

DESCRIPTION

Name

Enter a name for the address group. You may use 1-31 alphanumeric

characters, underscores(

_

), or dashes (-), but the first character cannot

be a number. This value is case-sensitive.

Description

This field displays the description of each address group, if any. You can

use up to 60 characters, punctuation marks, and spaces.

Member List

The

Member

list displays the names of the address and address group

objects that have been added to the address group. The order of

members is not important.

Select items from the

Available

list that you want to be members and

move them to the

Member

list. You can double-click a single entry to

move it or use the [Shift] or [Ctrl] key to select multiple entries and use

the arrow button to move them.

Move any members you do not want included to the

Available

list.

OK

Click

OK

to save your changes back to the ZyWALL.

Cancel

Click

Cancel

to exit this screen without saving your changes.

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C

HAPTER

37

Services

37.1

Overview

Use service objects to define TCP applications, UDP applications, and ICMP

messages. You can also create service groups to refer to multiple service objects

in other features.

37.1.1

What You Can Do in this Chapter

•

Use the

Service

screens (

Section 37.2 on page 606

) to view and configure the

ZyWALL’s list of services and their definitions.

•

Use the

Service Group

screens (

Section 37.2 on page 606

) to view and

configure the ZyWALL’s list of service groups.

37.1.2

What You Need to Know

IP Protocols

IP protocols are based on the eight-bit protocol field in the IP header. This field

represents the next-level protocol that is sent in this packet. This section

discusses three of the most common IP protocols.

Computers use Transmission Control Protocol (TCP, IP protocol 6) and User

Datagram Protocol (UDP, IP protocol 17) to exchange data with each other. TCP

guarantees reliable delivery but is slower and more complex. Some uses are FTP,

HTTP, SMTP, and TELNET. UDP is simpler and faster but is less reliable. Some uses

are DHCP, DNS, RIP, and SNMP.

TCP creates connections between computers to exchange data. Once the

connection is established, the computers exchange data. If data arrives out of

sequence or is missing, TCP puts it in sequence or waits for the data to be re-

transmitted. Then, the connection is terminated.

In contrast, computers use UDP to send short messages to each other. There is no

guarantee that the messages arrive in sequence or that the messages arrive at all.

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