[Oisf-users] Suricata only alerts for the first few rules of rule file

David Wharton oisf at davidwharton.us
Thu Jan 9 06:03:36 UTC 2020

Looks like there is a limit of 15 alerts per packet.  From 

#define  PACKET_ALERT_MAX  15

You could try increasing this and recompiling.


On 1/9/20 2:33 AM, Lucas Augusto Mota de Alcantara wrote:
> Hello everyone,
> I'm testing some rules and I want to count how many times each rule 
> matches for a certain pcap file, but I noticed that suricata is 
> alerting for only the first few rules of the rule file.
> For example, in the attached files I have a .rules file with thousands 
> of rules and a .pcap file with 4 packets. Most rules in that file 
> should alert all 4 times, and some should still alert at least 1 time.
> The  problem is that when I check the fast.log for the alerts, only 60 
> alerts are being logged (the first 15 rules that alert once for each 
> packet). Is there a reason why suricata is only logging those first 
> few alerts? And is there a way to make sure suricata alerts every time 
> it should alert?
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