I've set up a max-src-conn-rate rule on my gateway router to

mitigate brute-force ssh attacks.  This router protects a /28

subnet, 25.108.82.80/28.
The relevant rules:
# pfctl -sr | grep attack

block drop in log quick proto tcp from  to any

pass in log proto tcp from any to any port = ssh keep state

(source-track rule, max-src-conn-rate 3/30, overload

 flush global, src.track 30)

#
What the three columns of output in the below tcpdump output are:

timestamp, rule action, and target host.  As you can tell from

the tcpdump command, the sending host is the same in all cases,

208.53.147.204
# tcpdump -enr /var/log/pflog host 208.53.147.204 \

quoted text
>       | awk '{print ,,}' | sed s/.22:// | head -30

reading from file /var/log/pflog, link-type PFLOG (OpenBSD pflog file)

12:09:45.849594 pass 25.103.82.80

12:09:45.850279 pass 25.103.82.82

12:09:45.850827 pass 25.103.82.83

12:09:45.851310 pass 25.103.82.84

12:09:45.852003 pass 25.103.82.85

12:09:45.852496 pass 25.103.82.86

12:09:45.853007 pass 25.103.82.87

12:09:45.866580 pass 25.103.82.88

12:09:45.867345 pass 25.103.82.89

12:09:45.868339 pass 25.103.82.92

12:09:45.902389 pass 25.103.82.95

12:25:52.632295 pass 25.103.82.80

12:25:52.632973 pass 25.103.82.82

12:25:52.648804 pass 25.103.82.83

12:25:52.684792 pass 25.103.82.84

12:25:52.687989 pass 25.103.82.85

12:25:52.688652 pass 25.103.82.86

12:25:52.690882 pass 25.103.82.87

12:25:52.691371 pass 25.103.82.88

12:25:52.692290 pass 25.103.82.89

12:25:52.695340 pass 25.103.82.92

12:25:52.698864 pass 25.103.82.95

13:08:36.949178 pass 25.103.82.87

13:08:38.864585 pass 25.103.82.87

13:08:40.452215 pass 25.103.82.87

13:08:42.038388 pass 25.103.82.87

13:08:46.923469 block 25.103.82.88

13:08:49.922116 block 25.103.82.88

13:08:50.212040 block 25.103.82.87

13:08:51.099435 block 25.103.82.87

#

It seems to me like this host should have been blocked back at

12:09:45, not 13:08:46.  Am I misunderstanding the rule?

  --david
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