1BPFMON(8)                   System Manager's Manual                  BPFMON(8)
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NAME

6       bpfmon - BPF based visual packet rate monitor
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SYNOPSIS

9       bpfmon
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11       bpfmon [-autzvIiLlnNh] <device> '<bpf_filter_code>'
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13       bpfmon [-autzvIiLlnNh] iptables '[<table>] <chain> <rulenum>'
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15       bpfmon [-autzvIiLlnNh] iptables [select]
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DESCRIPTION

18       bpfmon  (like tcpdump) uses BPF filter to select packets that match the
19       filter.  While with tcpdump it is easy to see what  packets  match  the
20       filter, bpfmon shows how much are the matches packets in terms of bytes
21       per second and packets per second.
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23       bpfmon displays the information in pseudo-graphical text interface, de‐
24       veloped for modern terminals, but it also supports pure ASCII display.
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26       In addition, bpfmon allows instead of monitoring packets matching a BPF
27       filter to get its data from an iptables rule (on Linux systems).
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29       In interactive mode, there are hot keys to display help or  modify  the
30       mode of operation.
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32       Without  any  arguments,  bpfmon  will  display its version and options
33       help.
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OPTIONS

36       -a     Use ASCII drawing characters
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38       -u     Use UTF-8 drawing characters
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40       -t     Use no interface (simple text output)
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42       -z     Use horizontal full-screen interface
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44       -v     Use vertical full-screen interface
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46       -I     Show history in vertical full-screen
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48       -i     Hide history in vertical full-screen
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50       -L     Show legend in vertical full-screen
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52       -l     Hide legend in vertical full-screen -n Show interface  white  on
53              black
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55       -N     Show interface inverse (black on white)
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57       -h     Show usage information and exit
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KEYBOARD SHORTCUTS

60       h, H, ?
61              Toggle help screen
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63       a, A   switch to ASCII drawing chars
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65       u, U   switch to UTF-8 drawing chars
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67       m, M   toggle horizontal/vertical mode
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69       i, I   toggle history in vertical mode
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71       l, L   toggle legend in vertical mode
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73       r, R, Ctrl-L
74              refresh screen
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76       q, Q, Ctrl-C
77              Exit
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SEE ALSO

80       tcpdump(8), bpf(4), pcap-filter(7)
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AUTHOR

83       The bpfmon program was written by Boian Bonev from 2014 to 2021.
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85       This  manual page was written by Boian Bonev for the Debian project and
86       is placed in the public domain.
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90                                September 2020                       BPFMON(8)