ZyXEL Communications Internet Security Gateway ZyWALL 100 - Manual (Page 180)

ZyWALL 100 Internet Security Gateway
16-10 Creating Custom Rules
SERVICE DESCRIPTION
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.