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Restricting Communication by Using Firewalls
3JX3-072
Without pr
oper security, unauthorized third parties can access computers and other communication devices that are
connected to a network. To prevent this unauthorized access, specify the settings for packet î ´lter, a feature that
restricts communication to devices with speciî ´ed IP addresses or MAC addresses.
Specifying IP Addresses for Firewall Settings(P. 368)
Specifying MAC Addresses for Firewall Settings(P. 371)
Managing the Machine
367
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