ZyXEL Communications 70 Series User Manual

ZyWALL 5/35/70 Series User’s Guide

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Chapter 11 Firewall Screens

The Predefined Services table in the Service screen 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, DNS (UDP/TCP:53) means UDP port 53 and TCP port 53. 

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.

Table 74   Firewall Edit Custom Service

Table 75   Predefined Services 

Any_All(ALL:0)

This is for any IP protocol using any port or type.

Any_TCP(TCP:1~65535)

This is for any TCP protocol using any TCP port.

Any_UDP(UDP:1~65535)

This is for any UDP protocol using any UDP port.

Any_ICMP(ICMP:0)

This is for any ICMP protocol using any ICMP type and code.

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.

BOOTP_CLIENT(UDP:68) 

DHCP Client.

BOOTP_SERVER(UDP:67) 

DHCP Server.

CU-SEEME (TCP/UDP:7648, 

24032) 

A popular videoconferencing solution from White Pines Software.

DNS(TCP/UDP:53) 

Domain Name Server, a service that matches web names (e.g. 

www.zyxel.com) to IP numbers.

FINGER(TCP:79) 

Finger is a UNIX or Internet related command that can be used to find 

out if a user is logged on.

FTP(TCP:20.21) 

File Transfer Program, a program to enable fast transfer of files, 

including large files that may not be possible by e-mail.

H.323(TCP:1720)

NetMeeting uses this protocol.

HTTP(TCP:80) 

Hyper Text Transfer Protocol – a client/server protocol for the world 

wide web.

HTTPS(TCP:443)

HTTPS is a secured http session often used in e-commerce.

ICQ(UDP:4000)

This is a popular Internet chat program.

IKE(UDP:500)

The Internet Key Exchange algorithm is used for key distribution and 

management.