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wessels avatar wessels commented on August 20, 2024

You can give branch https://github.com/measurement-factory/dnstop/tree/cidr-aggregation a try. See new -C and -D options.

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johnhtodd avatar johnhtodd commented on August 20, 2024

Thanks!

  1. The in-line help on the app doesn't yet show the new commands ("./dnstop -h")

  2. I'm not quite sure how the view looks in the output, or if I'm interpreting things incorrectly. I ran "./dnstop en5 -C 24" and this is the output on the "source" view:

[snip]
Sources Count % cum%

192.168.1.39 15 93.8 93.8
192.168.1.50 1 6.2 100.0

I was expecting this to look something like:

192.168.1.0/24 16 100 100

Switching to "D"estination view has roughly the same output, even though the two destination addresses are in the same /24 but different /32's.

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wessels avatar wessels commented on August 20, 2024

Sounds like you might not be running the modified version? It definitely in the -h output. The Sources display won't show /nn but it should masked addresses, like this

Queries: 47 new, 3888 total         Wed Oct 19 12:12:47 2022

Sources                        Count      %   cum%
-------------------------- --------- ------ ------
173.230.152.0                    152    3.9    3.9
186.203.163.0                     94    2.4    6.3
2600:3c01::f03c:91ff:0:0          68    1.7    8.1
212.142.48.0                      51    1.3    9.4
179.55.90.0                       38    1.0   10.4
198.142.152.0                     37    1.0   11.3
45.182.72.0                       35    0.9   12.2
12.121.91.0                       22    0.6   12.8
2804:14d:810:672:189:7::          21    0.5   13.3
77.20.151.0                       17    0.4   13.8
2001:b000:180:8002:0:2::          16    0.4   14.2

./dnstop: invalid option -- 'h'
usage: dnstop [opts] netdevice|savefile
        -4      Count IPv4 packets
        -6      Count IPv6 packets
        -Q      Count queries
        -R      Count responses
        -a      Anonymize IP Addrs
        -b expr BPF program code
        -B num  Use num hash table buckets (default 100057)
        -C len  Aggregate IPv4 addresses by prefix length
        -D len  Aggregate IPv6 addresses by prefix length

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johnhtodd avatar johnhtodd commented on August 20, 2024

My apologies - yes, I fumbled the branch checkout suffix. Works as intended after re-compile - this is very helpful, thanks!

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