Technical Reference; Stateful Inspection Firewall - ZyXEL Communications MAX-306M1 User Manual

Chapter 16 The Firewall Screens
Table 67 TOOLS > Firewall > Service Setting (continued)
LABEL
Blocked
Services
Type
Port Number
Add
Delete
Clear All
Schedule to Block
Day to Block
Time of Day to
Block
Apply
Reset

16.4 Technical Reference

The following section contains additional technical information about the WiMAX
Modem features described in this chapter.

16.4.1 Stateful Inspection Firewall.

Stateful inspection firewalls restrict access by screening data packets against
defined access rules. They make access control decisions based on IP address and
protocol. They also "inspect" the session data to assure the integrity of the
connection and to adapt to dynamic protocols. These firewalls generally provide
the best speed and transparency; however, they may lack the granular application
level access control or caching that some proxies support. Firewalls, of one type or
another, have become an integral part of standard security solutions for
enterprises.
194
DESCRIPTION
This is a list of services (ports) that are inaccessible to computers on
your LAN when service blocking is effective. To remove a service from
this list, select the service, and click Delete.
Select TCP or UDP, based on which one the custom port uses.
Enter the range of port numbers that defines the service. For example,
suppose you want to define the Gnutella service. Select TCP type and
enter a port range of 6345-6349.
Click this to add the selected service in Available Services to the
Blocked Services list.
Select a service in the Blocked Services, and click this to remove the
service from the list.
Click this to remove all the services in the Blocked Services list.
Select which days of the week you want the service blocking to be
effective.
Select what time each day you want service blocking to be effective.
Enter times in 24-hour format; for example, 3:00pm should be entered
as 15:00.
Click to save your changes.
Click to restore your previously saved settings.
User's Guide