ZyXEL Communications 10 - Manual (Page 207)

ZyWALL 10~100 Series Internet Security Gateway
Creating Custom Rules 16-11
Table 16-2 Predefined Services
SERVICE DESCRIPTION
TACACS(UDP:49) Login Host Protocol used for (Terminal Access Controller Access Control
System).
TELNET(TCP:23) Telnet is the login and terminal emulation protocol common on the Internet
and in UNIX environments. It operates over TCP/IP networks. Its primary
function is to allow users to log into remote host systems.
TFTP(UDP:69) Trivial File Transfer Protocol is an Internet file transfer protocol similar to
FTP, but uses the UDP (User Datagram Protocol) rather than TCP
(Transmission Control Protocol).
VDOLIVE(TCP:7000) Another videoconferencing solution.
16.5.1 Creating/Editing Firewall Rules
Follow these directions to create a new rule.
Step 1. In the Summary screen, type the index number for where you want to put the 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.
Step 2. Click Insert to display this screen and refer to the following table for information on the fields.