| Publisher | OReilly Media | ||
|---|---|---|---|
| Format | 142.8KB PDF | Date added | 09 Nov 2005 |
| Topics | Monitoring Systems, Network Security, Mobile - Wireless Communications | ||
| Downloads | 34 | ||
MAC address filters on access points are easily circumvented using commonly available tools. If one's APs are bridged to the Ethernet segment, there are a couple of utilities one can use to look for people spoofing their MAC addresses. One such tool is arpwatch, available from http://wwwnrg. ee.lbl.gov/nrg.html. arpwatch runs as a daemon on any machine and keeps track of the MAC address/IP address pairs as ARP replies pass through the network. When it notices something out of the ordinary, it logs the activity to syslog and sends an email to the address of one's choice. Aside from looking for suspicious activity, this also gives one a nice log of every new user on the wireless network.
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