narutaro / nprobe.md

Created January 23, 2016 01:42

nprobe

nprobe --collector-port 6789 --dump-path /nprobe

narutaro / table test.md

Last active February 28, 2016 21:55

table test

Gistlog supports github markdown style table. A table looks like this.

ft-Aligned	Center Aligned	Right Aligned
col 3 is	some wordy text	$1600
col 2 is	centered	$12
zebra stripes	are neat	$1

narutaro / vim tips.md

Created February 5, 2016 06:45

vim tips

write a read-only file after modifiying some

:w !sudo tee % > /dev/null

narutaro / Python vs. Ruby.md

Last active February 12, 2016 22:25

Grumbles of a rubyist who tries to learn python

Create a unique list of lists/array of arrays - the winner is ruby

ruby

[1] pry(main)> a = [[1, 2],[1,2],[3,4]]
=> [[1, 2], [1, 2], [3, 4]]
[2] pry(main)> a.uniq
=&gt; [[1, 2], [3, 4]]

narutaro / cron with rbenv.md

Last active April 14, 2022 09:26

cron with rbenv

`cron` does not work with `rbenv`?

If your cron does not work, in many cases, that's because enviromental value.

Check your environmental values

You use rbenv and created some ruby scripts. Now you want to set it to cron.

43 19 * * * ruby your_ruby_script.rb

narutaro / Cypher I have written.md

Last active February 9, 2016 23:46

Cypher I have written

Two common connections

match (l {name: '54.230.141.207'})<-[r1]-(n)-[r]->(m {name: '184.25.56.107'}) return l, r1, n, r, m;
match (l {name: '54.230.141.207'})<-[r1]-(n)-[r]->(m {name: '54.230.141.216'}) return n;
match (l {name: '54.230.141.207'})<-[r1]-(n)-[r]->(m {name: '54.230.141.216'}) return n.name;

Search by a property

narutaro / netflow_generator_hands_on.md

Last active September 1, 2021 03:17

Comparing NetFlow generators

Sharing my hands-on experience on some of the free NetFlow generators. I use Paessler NetFlow Generator for quick test, Flowalyzer™ NetFlow Generator for complicated flow creation and flowgen for automated performance testing.

Paessler NetFlow Generator

Screenshot:

Pros:

narutaro / How to decode NetFlow version with tcpdump.md

Last active June 13, 2019 14:31

How to decode NetFlow version with tcpdump

Here you go.

sudo tcpdump -i <if> -n udp port <port_num> -T cnfp

You see:

05:10:47.244695 IP (tos 0x0, ttl 56, id 28920, offset 0, flags [none], proto UDP (17), length 1484)

narutaro / Regular expression for IPv4, IPv6, URL and domain.md

Last active May 5, 2020 23:27

Regular expression for IPv4, IPv6, URL and domain

IPv4 address

select source from table where source ~ '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' limit 10;

IPv6 address

narutaro / suricata.md

Last active March 24, 2016 22:44

Suricata

sudo suricata -c /usr/local/etc/suricata/suricata.yaml  -v -i eth0

/usr/local/etc/suricata$ tree
.
├── classification.config

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