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I like how pftop shows how much bandwidth is going to any one host? Does anyone know of anything equivalent to run on windows that doesn't require an install? It would be nice to just throw it on a machine that is getting pounded to see who is causing the problem.
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If you are interested in keeping an eye on what passes in to and out of your network, Can Erkin Acar's pftop is a very useful tool. The name is a strong hint at what it does - pftop shows a running snapshot of your traffic in a format which is strongly inspired by top(1):
pfTop: Up State 1-21/67, View: default, Order: none, Cache: 10000 19:52:28
PR DIR SRC DEST STATE AGE EXP PKTS BYTES
tcp Out 194.54.103.89:3847 216.193.211.2:25 9:9 28 67 29 3608
tcp In 207.182.140.5:44870 127.0.0.1:8025 4:4 15 86400 30 1594
tcp In 207.182.140.5:36469 127.0.0.1:8025 10:10 418 75 810 44675
tcp In 194.54.107.19:51593 194.54.103.65:22 4:4 146 86395 158 37326
tcp In 194.54.107.19:64926 194.54.103.65:22 4:4 193 86243 131 21186
tcp In 194.54.103.76:3010 64.136.25.171:80 9:9 154 59 11 1570
tcp In 194.54.103.76:3013 64.136.25.171:80 4:4 4 86397 6 1370
tcp In 194.54.103.66:3847 216.193.211.2:25 9:9 28 67 29 3608
tcp Out 194.54.103.76:3009 64.136.25.171:80 9:9 214 0 9 1490
tcp Out 194.54.103.76:3010 64.136.25.171:80 4:4 64 86337 7 1410
udp Out 194.54.107.18:41423 194.54.96.9:53 2:1 36 0 2 235
udp In 194.54.107.19:58732 194.54.103.66:53 1:2 36 0 2 219
udp In 194.54.107.19:54402 194.54.103.66:53 1:2 36 0 2 255
udp In 194.54.107.19:54681 194.54.103.66:53 1:2 36 0 2 271Your connections can be shown sorted by a number of different criteria, among others by PF rule, volume, age and so on.
This program is not in the base system itself, but is in ports on OpenBSD and FreeBSD both as /usr/ports/sysutils/pftop, on NetBSD via pkgsrc as sysutils/pftop.
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I know about pftop, but is there a version for windows?
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While it does not show bandwidth used, TCPView gets most of the other information about active connections:
http://technet.microsoft.com/en-us/sysinternals/bb897437.aspx
