# Suricata and IP blacklist

**URL:** https://forum.suricata.io/t/suricata-and-ip-blacklist/972
**Category:** Help
**Created:** [January 13, 2021, 8:25pm UTC](https://forum.suricata.io/t/suricata-and-ip-blacklist/972 "2021-01-13T20:25:43Z")
**Posts on this page:** 1
**Showing post:** 28

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### Author: ![ManuelFFF](https://avatars.discourse-cdn.com/v4/letter/m/a88e4f/32.png) [@ManuelFFF](https://forum.suricata.io/u/ManuelFFF)
#### Post date: [February 1, 2021, 1:47pm UTC](https://forum.suricata.io/t/suricata-and-ip-blacklist/972/28 "2021-02-01T13:47:45Z")

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Hi,

Just to be in the same page, when all the IPs are in a single list AND there are just a few lines (I don’t know what the limit is), the blocking mechanism works as expected.

But, by mixing all the lists into a single list, without any limits, the number of lines amounts to more than 50,000 and only a few IPs are blocked.

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