Hello, I found arp attack under windows,so i installed "arpon" in Debian Squeeze,even if there is no "ip confiction" prompt as windows. When service arpon is started,it sayed: "ERROR: arpon.c:685 @ eth0: no IPv4 address assigned.",then quit with failure. The problem is my pppoe cann't get connection when dhcp was used on eth0 ("nslookup website" will fail). So in my /etc/network/interface is: ### auto lo iface lo inet loopback
auto myisp iface myisp inet ppp provider dsl-provider allow-hotplug eth0 ### and as a result,the ifconfig output is: ### eth0 Link encap:Ethernet HWaddr 00:14:0b:36:0f:e5 inet6 addr: fe80::214:bff:fe36:fe5/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:327783 errors:0 dropped:0 overruns:0 frame:0 TX packets:239219 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:363595254 (346.7 MiB) TX bytes:20418761 (19.4 MiB) Interrupt:23 Base address:0x4800 ppp0 Link encap:Point-to-Point Protocol inet addr:10.0.0.126 P-t-P:10.0.0.1 Mask:255.255.255.255 UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1492 Metric:1 RX packets:249097 errors:0 dropped:0 overruns:0 frame:0 TX packets:239183 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:3 RX bytes:351496310 (335.2 MiB) TX bytes:15152829 (14.4 MiB) ### if using "arpon -i ppp0",then it shows:" ERROR: (null) device's datalink is not supported!" if i start eth0 using dhcp,with ifconfig output below,the arpon can get started rightly,but nslookup failed. ifconfig output: ### eth0 Link encap:Ethernet HWaddr 00:14:0b:36:0f:e5 inet addr:192.168.1.213 Bcast:192.168.1.255 Mask:255.255.255.0 inet6 addr: fe80::214:bff:fe36:fe5/64 Scope:Link UP BROADCAST RUNNING PROMISC MULTICAST MTU:1500 Metric:1 RX packets:331384 errors:0 dropped:0 overruns:0 frame:0 TX packets:239548 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:364022940 (347.1 MiB) TX bytes:20471884 (19.5 MiB) Interrupt:23 Base address:0x4800 ppp0 Link encap:Point-to-Point Protocol inet addr:10.0.0.126 P-t-P:10.0.0.1 Mask:255.255.255.255 UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1492 Metric:1 RX packets:53 errors:0 dropped:0 overruns:0 frame:0 TX packets:48 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:3 RX bytes:8991 (8.7 KiB) TX bytes:6578 (6.4 KiB) ### What i concern is how can i use "arpon" with my pppoe connection as there is such a problem. Is there arp attack concern in linux?