BSR 2000 Configuration and Management Guide
Release 1.0
6-16
MGBI
526360-001-00 Rev. B
displays typical
show host authorization
command output:
Figure 6-2 show host authorization Command Output
Using DHCP Lease Query Function to Secure the Cable
Network
The DHCP lease query feature provides additional security on the cable network by
preventing hackers from stealing service from customers. Hackers steal service from
other subscribers by spoofing their connection information contained in ARP
broadcasts. Preventing hackers from spoofing the cable network also prevents
undesirable ARP broadcasts from disrupting service on the cable network.
The DHCP Lease Query feature is used in conjunction with the host authorization
feature on the BSR to query the location of a hacker’s Cable Modem (CM) and its
connected Customer Premises Equipment (CPE) when a packet either arrives from or
is destined to a subscriber’s CM and its CPE, and has no location information in the
DHCP Lease table.
Device Type State Seconds Modem MAC Addr Host IP Addr
Modem Dyn Ack-TD-TF 600 0090.833d.bbcf 7.1.1.17
Modem Dyn Ack-TD-TF 600 000b.0696.4730 7.1.1.18
Modem Dyn Ack-TD-TF 600 000b.0626.3bf0 7.1.1.20
Modem Dyn Ack-TD-TF 600 0090.8336.d2fd 7.1.1.33
Modem Dyn Ack-TD-TF 600 0090.8335.5226 7.1.1.26
Modem Dyn Ack-TD-TF 600 0090.833d.bbe4 7.1.1.19
Modem Dyn Ack-TD-TF 600 0090.833d.8f8a 7.1.1.27
Modem Dyn Ack-TD-TF 600 0090.833d.bbdc 7.1.1.24
Modem Dyn Ack-TD-TF 600 0090.833d.bbde 7.1.1.21
Modem Dyn Ack-TD-TF 600 0090.833d.8f82 7.1.1.15
Modem Dyn Ack-TD-TF 600 0090.834c.3e25 7.1.1.35
Modem Dyn Ack-TD-TF 600 0090.8348.eaa7 7.1.1.29
Modem Dyn Ack-TD-TF 600 0090.833d.bbd0 7.1.1.25
Modem Dyn Ack-TD-TF 600 0090.8336.cdf1 7.1.1.30
Modem Dyn Ack-TD-TF 600 0090.833d.bbe5 7.1.1.32
Modem Dyn Ack-TD-TF 600 0090.833d.8f88 7.1.1.22
Modem Dyn Ack-TD-TF 600 000b.06a5.5458 7.1.1.16
Modem Dyn Ack-TD-TF 600 0090.8348.eaa3 7.1.1.34
Modem Dyn Ack-TD-TF 600 0008.0e95.48e4 7.1.1.31
Modem Dyn Ack-TD-TF 600 000b.0699.f77e 7.1.1.23
Summary of Contents for BSR 2000
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