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Bug #3889

open

Support interfaces with MTU > 1500

Added by Oded Lazar about 1 year ago. Updated about 1 year ago.

Status:
In Review
Priority:
Normal
Assignee:
Oded Lazar
Target version:
7.0rc1
Affected Versions:
6.0.0beta1
Effort:
low
Difficulty:
low
Label:
Beginner

Description

Suricata currently doesn't support interfaces with MTU set under 1500.
the default block size is 32768 on most machines (pagesize ^ order --> 4096 ^ 3),
thus suricata splits the payload to 32768 / 1500 -> 22.

If an interface has a bigger MTU, such as localhost which defaults to 65536, the block size is too small.

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