[Oisf-users] Why blocks suri this traffic?

[Stefan Sabolowitsch]

Hi all,
have here latest git version an this start option:
suricata --user sguil --group sguil -c /etc/nsm/Serrig-intern/suricata.yaml -q 0 -q 1 -q 2 -q 3 -l /nsm/sensor_data/Serrig-intern --runmode workers

I wanted to prevent that suri blocks access to a Web page. Here the appropriate log entry in evejson -> alert.

"message": "{\"time\":\"03\\/04\\/2014-07:15:17.412182\",\"event_type\":\"alert\",\"src_ip\":\"192.168.100.254\",\"src_port\":80,\"dest_ip\":\"192.168.1.69\",\"dest_port\":51538,\"proto\":\"TCP\",\"alert\":{\"action\":\"wDrop\",\"gid\":1,\"signature_id\":2221021,\"rev\":1,\"signature\":\"SURICATA HTTP response header invalid\",\"category\":\"Generic Protocol Command Decode\",\"severity\":3}}",

Then made the following entries in threshold.conf and restart suri.

suppress gen_id 1, sig_id 2221021, track by_src, ip 192.168.100.254

Now although no alert more in evejson written, but the traffic is still blocked. I found this drop message in evejson.

{"time":"03\/04\/2014-07:45:39.159838","event_type":"drop","src_ip":"192.168.1.69","src_port":52842,"dest_ip":"192.168.100.254","dest_port":80,"proto":"TCP","drop":{"len":
40,"tos":0,"ttl":63,"ipid":50755,"tcpseq":3077954821,"tcpack":2506757002,"tcpwin":65535,"syn":false,"ack":true,"psh":false,"rst":false,"urg":false,"fin":true,"tcpres":0,"t
cpurgp":0}}

Why still blocks suri the traffic, a Bug?
Is threshold.conf in the IPS-mode not effective?

regards
Stefan