UTT Technologies
Chapter 9 Firewall
http://www.uttglobal.com
Page
1131131
be repeated.
Action:
It specifies the action to be taken if a packet matches the access rule. The
available options are
Allow
and
Deny
.
●
Allow:
It indicates that the Gigabit Router will allow the packets matching the
rule, that is, the Gigabit Router will forward these packets.
●
Deny:
It indicates that the Gigabit Router will deny the packets matching the rule,
that is, the Gigabit Router will drop these packets.
Filtering Type:
It specifies the filtering type of the access rule. The options are
IP
Filtering
,
URL Filtering
, and
Keyword Filtering
. Here please select
IP Filtering
.
Protocol:
It specifies the protocol to which the access rule applies. The options are
1
(ICMP)
,
6 (TCP)
,
17 (UDP)
,
51 (AH)
, and
All
. Select
All
if you want to the rule to
apply to all protocols.
Apendix C
provides the list of common IP protocols and their
protocol numbers.
Predefined Service:
It provides some of the most common services and their
associated port numbers. Select
All
if you want to the rule to apply to all ports
1-65535)
.
Apendix D
provides the list of common services and their port numbers.
Dest Port Start
and
Dest Port End:
They specify a range of destination ports to
which the access rule applies. To specify a single port, enter the port number in both
text boxes. The port number must be between 1 and 65535.
Dest IP Start
and
Dest IP End:
They specify a range of destination IP addresses to
which the access rule applies. To specify a single IP addres, enter the port number in
both text boxes.
Source Port Start
and
Source Port End:
They specify a range of source ports to
which the access rule applies. To specify a single port, enter the port number in both
text boxes. The port number must be between 1 and 65535.
Schedule:
It allows you to specify when the access rule is in effect. By default, the
access rule is always in effect.
Save:
Click to save your changes.
Cancel:
Click to revert to the last saved settings.
Back:
Click to go back to the
Access Rule List
.
Note
By default, the
Source IP Range
is from 0.0.0.0 to 0.0.0.0, which means the access
rule applies to all computers on the LAN no matter what IP address they might have.
In this case, the Gigabit Router will check any packets initiated from the LAN
computers, so the system performance will be degraded to some extent. Therefore,
you’d
better
change
the
default
value.
