Thread: Connect to Internet on demand & disconnect automatically, particularly for GPRS?
View Single Post
azstunt is offline azstunt
2010-02-13 , 22:22
Posts: 43 | Thanked: 32 times | Joined on Jan 2010
#134
Originally Posted by calvin_42 View Post
Code:
apt-get install tcpdump
See http://www.tcpdump.org/tcpdump_man.html for documentation.
Ok, I've installed it... fooled around with it a bit, etc. Anyway, is any of this useful?

Code:
$ tcpdump -i wmaster0 -vv
tcpdump: WARNING: can't create rx ring on packet socket 3: 92-Protocol not avalaible
tcpdump: WARNING: wmaster0: no IPv4 address assigned
tcpdump: listening on wmaster0, link-type IEEE802_11 (802.11), capture size 96 bytes
14:50:44.391267 0us ARP, Ethernet (len 6), IPv4 (len 4), Reply 1 192.168.1.68 is-at c0:38:f9:b3:07:02 (oui Unknown), length 28
14:50:02.515687 0us ARP, Ethernet (len 6), IPv4 (len 4), Reply 1 192.168.1.68 is-at c0:38:f9:b3:07:02 (oui Unknown), length 28
14:50:22.484437 0us ARP, Ethernet (len 6), IPv4 (len 4), Reply 1 192.168.1.68 is-at c0:38:f9:b3:07:02 (oui Unknown), length 28
14:50:43.375062 0us ARP, Ethernet (len 6), IPv4 (len 4), Reply 1 192.168.1.68 is-at c0:38:f9:b3:07:02 (oui Unknown), length 28
14:50:02.523560 0us ARP, Ethernet (len 6), IPv4 (len 4), Reply 1 192.168.1.68 is-at c0:38:f9:b3:07:02 (oui Unknown), length 28
14:50:22.390687 0us ARP, Ethernet (len 6), IPv4 (len 4), Reply 1 192.168.1.68 is-at c0:38:f9:b3:07:02 (oui Unknown), length 28
14:50:42.350495 0us ARP, Ethernet (len 6), IPv4 (len 4), Reply 1 192.168.1.68 is-at c0:38:f9:b3:07:02 (oui Unknown), length 28
14:50:02.531312 0us ARP, Ethernet (len 6), IPv4 (len 4), Reply 1 192.168.1.68 is-at c0:38:f9:b3:07:02 (oui Unknown), length 28
14:50:22.500031 0us ARP, Ethernet (len 6), IPv4 (len 4), Reply 1 192.168.1.68 is-at c0:38:f9:b3:07:02 (oui Unknown), length 28
and

Code:
$ tcpdump -i wlan0
tcpdump: WARNING: can't create rx ring on packet socket 3: 92-Protocol not avalaible
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
tcpdump: listening on wlan0, link-type EN10MB (Ethernet), capture size 96 bytes
15:43:40.320800 ARP, Request who-has 192.168.1.68 (Broadcast) tell 192.168.1.254, length 28
15.43.40.321075 ARP, Reply 192.168.1.68 is-at c0:38:f9:b3:07:02 (oui Unknown), length 28
15:44:00.404540 ARP, Request who-has 192.168.1.68 (Broadcast) tell 192.168.1.254, length 28
15.44.00.404815 ARP, Reply 192.168.1.68 is-at c0:38:f9:b3:07:02 (oui Unknown), length 28
15:44:21.500182 ARP, Request who-has 192.168.1.68 (Broadcast) tell 192.168.1.254, length 28
15.44.21.500457 ARP, Reply 192.168.1.68 is-at c0:38:f9:b3:07:02 (oui Unknown), length 28
15:44:40.444274 ARP, Request who-has 192.168.1.68 (Broadcast) tell 192.168.1.254, length 28
15.44.40.444549 ARP, Reply 192.168.1.68 is-at c0:38:f9:b3:07:02 (oui Unknown), length 28