CIDR,subnet relating

Elastic Stack Logstash
#1

Hi All,

Will I be able to match my ip address to subnets ,i know we can use CIDR ,but I have around 800 subnets is there any way I can match the ip addresses with that using translate and CIDR together .

I want to match my source ip and destination ip , to the csv file which I have for 800 subnets with location details.

Any help would be appreciable and useful for me

Thank you in Advance

Raj

Filter IP addresses by subnet
#2

Any help pls :slight_smile:

#3

I'm pretty sure you can do this very easy.
lets's say you have a subnet 192.168.0.0-192.168.0.255 called Home.
You should have a field IPSource that reads the ip from the message.
then use an if in your output:

if "192.168.0.*" in [IPSource]{
subnet => "Home"
}

#4

Thank you so much for the reply ,but i have 800 unique subnets with different location names, is it only way to hard code each every subnets?

#5

If I were you I would just read both files in and then match them in elasticsearch. I think elasticsearch is beter fit to solve this problem.

#6

77.72.127.96/29 25 home
67.72.107.88/29 25 home2
52.211.247.96/27 home3
47.72.84.0/27 home4
31.161.152.0/24 home5
27.73.110.0/23 home6

Something like this if i get a source ip in 77.72.127.97 in my logs, i should get a field name called home

#7

Any sugesstions ? :slight_smile:

#8

I'm also a beginner I just started using ELK since 1 week so I can't just give you the answer but I can help looking :slight_smile:

https://www.elastic.co/guide/en/elasticsearch/reference/current/search-aggregations-bucket-iprange-aggregation.html

This looks pretty usefull. Just take your time and look some more into elasticsearch I'm pretty sure you can find the solution in less then a day :slight_smile:

#9

Thank you :slight_smile:

1 Like
#10

This topic was automatically closed 28 days after the last reply. New replies are no longer allowed.