Using GB-Ware 3.62 with a private class C network.
A few times a week, someone in our sales staff will walk into the
building with their wireless laptop already turned on. When this
happens, the firewall writes a message like the following to syslog
(I've x'd out the actual IP address.):
Jun 16 08:18:24 gnatbox id=firewall time="2005-06-16 12:18:24" fw="12100192" pri=3 msg="kernel: arp: 00:90:4b:b4:7e:65 is using my IP address xxx.xxx.xxx.xxx!" type=mgmt
When this happens, all machines on the network immediately lose internet
connectivity. What's odd is that the offending laptops never actually
have the IP address of the firewall.
On the Unix box running our mail server, I run 'arp -d gnatbox' and this
seems to restore connectivity to all machines on the network.
I'm sure I've left out a lot of detail, but I don't understand the
problem well enough to know what might be important.
Can anyone provide a clue as to what might be going on and how we can
stop it?
--
Roger Cornelius rac_at_custom-mobility_dot_com
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