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Administrator’s Handbook
168
•
The host 199.211.211.17 is the source of the Telnet packets you want to block, while the destination
address is any IP address. How these IP addresses are masked determines what the final match will be,
although the mask is not displayed in the table that displays the filter sets (you set it when you create
the filter). In fact, since the mask for the destination IP address is 0.0.0.0, the address for Destination
IP address could have been anything. The mask for Source IP address must be 255.255.255.255 since
an exact match is desired.
•
Source IP Address = 199.211.211.17
•
Source IP address mask = 255.255.255.255
•
Destination IP Address = 0.0.0.0
•
Destination IP address mask = 0.0.0.0
•
Using the tables on
page 166
, find the destination por t and protocol numbers (the
local
Telnet por t):
•
Protocol = TCP (or 6)
•
Destination Por t = 23
•
The filter should be enabled and instructed to block the Telnet packets containing the source address
shown in step 2:
•
For ward = unchecked
This four-step process is how we produced the following filter from the original rule:
Содержание Netopia 7000
Страница 18: ...Administrator s Handbook 18 ...
Страница 115: ...115 The screen expands to display the VLAN settings ...
Страница 123: ...123 The Home page for a VoIP enabled Gateway with both phone lines registered is shown below ...
Страница 192: ...Administrator s Handbook 192 ...
Страница 222: ...Administrator s Handbook 222 ...
Страница 324: ...Administrator s Handbook 324 set ip backup gateway default ip_address Specifies the ip address of the default gateway ...
Страница 342: ...Administrator s Handbook 342 ...
Страница 366: ...Administrator s Handbook 366 Z Zero Touch 301 ...
Страница 367: ...367 Motorola Netopia 2200 3300 or 7000 series Motorola Inc 6001 Shellmound Street Emeryville CA 94608 August 2 2007 ...
Страница 368: ...Administrator s Handbook 368 ...