Western Telematic PLS-345 manual Implementing IP Security

Section 5: SetUp and Configuration

IP SECURITY:

1.Security Mask #1: (undefined)

2.Mask #1 Action: Permit

3.Security Mask #2: (undefined)

4.Mask #2 Action: Permit

5.Security Mask #3: (undefined)

6.Mask #3 Action: Permit

7.Security Mask #4: (undefined)

8.Mask #4 Action: Permit

9.Security Mask #5: (undefined)

10.Mask #5 Action: Permit

Enter Selection or <ESC> to Exit ...

Figure 5.5: The IP Security Menu

5.6.1.Implementing IP Security

The PLS-345 can be configured to restrict unauthorized IP addresses from Telneting to the unit. This allows the user to grant Telnet access only to a specific group of IP Addresses, or block a particular IP address from gaining access. In the default state, the PLS accepts incoming IP connections from all hosts. To configure the IP Security feature, proceed as follows:

1.Access the Network Parameters menu as described in Section 5.6. Note that the Network Parameters Menu and IP Security Menu are not available in User Mode.

2.When the Network Parameters menu appears, type 4 and press [Enter] to access the IP Security menu (Figure 5.5).

3.The IP Security menu lists five IP Security "masks" along with the selected permit/deny action for each mask.

a)Each Security Mask prompt is used to define a specific IP address or range of IP addresses. Each Mask Action prompt is used to define the permit/deny action for the corresponding Mask.

b)Masks are listed in order of ascending priority; Mask 1 has the lowest priority, Mask 5 has the highest priority.

c)Masks have a cumulative effect; high priority masks supersede the effect of lower priority masks.

d)Each IP Address consists of a series of four eight bit numbers. The number 255 is used as a wild card.

5-11