146
Item Description
Week
Select the days of a week for the rule to
take effect.
neither of them. To set neither of them,
make sure the Begin-End Time is 00:00 -
00:00 and no days of a week are
selected. Setting neither of them means
it takes effect all the time.
Protocol
Specify to control accesses based on the protocol used for data transmission.
Three options are available: TCP, UDP, and IP.
For which services use which protocols, see
Table 91
.
Source IP Address
Configure the IP address range of computers. To control a single IP address, enter
the address in the two fields.
Destination Port
Set the port range to be filtered.
For example, to control Telnet access, enter
23
in the two fields.
Operation
Action to be taken for matching packets.
The action is
Deny
, which means all packets matching the access control policies
are not allowed to pass.
Table 91 Commonly used services and their ports
Service Transport layer protocol Port number
FTP TCP 21
Telnet TCP 23
TFTP UDP 69
Web TCP 80
Access control configuration example
Network requirements
As shown Figure 155, internal users of a company, Host A to Host D, access the Internet through the
router. Configure an access control policy so that:
• Host A to Host C cannot access the Internet from 09:00 to 18:00 every Monday to Friday. They
can access the Internet at all other times.
• Host D can access the Internet any time.
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