Gratuitous Address Resolution Protocol Protection - Nortel 1110 Fundamentals

196 Nortel IP Phone 2007
When the IP Phone restarts, the firmware reads the setting for Full Duplex
mode and sets the LAN Ethernet port, PC Ethernet port, duplex, and speed
accordingly.
Use
activation of Full Duplex mode.
Procedure 37
Checking Ethernet Statistics
Step
1
2
3

Gratuitous Address Resolution Protocol Protection

Gratuitous Address Resolution Protocol (GARP) Protection prevents the IP
Phone 2007 from GARP Spoof attacks on the network. In a GARP Spoof
attack, a malicious device on the network takes over an IP address (usually
the default gateway) by sending unsolicited (or Gratuitous) ARP messages,
thus manipulating the ARP table of the victim machine. The malicious
device launches a variety of attacks on the network, that results in undesired
traffic routing. For example, a GARP attack can convince the victim machine
that the malicious device is the default gateway. In this scenario, all traffic
from the victim machine flows through the malicious device.
To enable GARP Protection during configuration, see
"Installing the IP Phone 2007" (page
Copyright © 2003–2007, Nortel Networks
.
Procedure 37 "Checking Ethernet Statistics" (page 196)
Action
Tap the Tools icon.
Tap the Local Diagnostics soft key.
Tap the Ethernet Statistics soft key.
The following statistics are displayed:
• Link: Up
• Duplex: Full
• Speed: 10 (Mb) or 100 (Mb)
• Auto-Negotiate Capability: N
• Auto-Negotiate Completed: N
Nortel Communication Server 1000
IP Phones Fundamentals
NN43001-368 02.01 Standard
Release 5.0 7 December 2007
—End—
—End—
186).
to confirm
Procedure 35