Issue with Suricata and interface

[aimdev]

Started suricata in ids mode, interface em0 wan.

On the console (direct connection) got a lot of
arpresolver: cannot allocate llinfo for xxx.xxx.xxx.xxx on em0
link state went down then up twice before I disabled suricata.

Messages were not found in gui syslog, despite the syslog option enabled in suricata administration

NIC's on the system are Intel.
Hardware options CRC/TSO/LRO are not disabled. (ie enabled)

[franco]

Normally cryptic "arpresolver: cannot allocate llinfo for xxx.xxx.xxx.xxx on em0" means your gateway lies outside the subnet of your assigned address on em0. Doesn't have anything to do with IDS.


Cheers,
Franco

[aimdev]

The gateway is on xxx.xxx.0.1, opnsense uses dhcp, with a locked address of xxx.xxx.0.64.
The mask is 255.255.255.0/24 (as set in the upstream device).
There are no errors when suricata is disabled.

One other factor is em0 is placed in to promiscuous mode when suricata is enabled, I assume this is normal.
This issue may have been present in earlier versions, however as the console is not connected to opnsense on a regular basis, only during upgrades, it would have been missed.
Also the missing logs is a bit of a concern, though I am happy to be corrected if I have missed something.

[orzechszek]

Hi,

I have such issue on 22.1.7_1
Updated from version 21.7.8

When suricata is is activated "link state changed to down/up" and "arpresolver: cannot allocate llinfo for xxx.xxx.xxx.xxx on em0" is constantly occuring, it's not a problem.
But the strangest thing - router became unstable, GUI unaccessible because computer is loosing wifi connection when intrusion detection is enabled.
Everything disappear when suricata is disabled.
Is it possible that IDS cause such problems?

[franco]

Might be a driver issue with MAC spoofing as suggested by others.


Cheers,
Franco

[orzechszek]

Hi,

Is this issue solved?

[crissi]

Hi,

updated to 22.1.9 today, have Standard Intel I211 Interfaces in my Box, and have this issue still as well...

Would also be interrested how to get this solved???