Hello,
Am 09.10.2017 um 12:33 schrieb Hajo Locke:
Hello List,
found today an abnormality in my apachestatus for some servers.
There are a lot of "h2 idle, streams" in apachestatus. This looks
like this:
14-0 28241 0/41/41 K 0.25 128 1 0.0 0.10 0.10 ip.ip.ip.ip h2 idle,
streams: 0/0/0/0/0 (open/recv/resp/push/rst)
15-0 28242 0/11/11 K 0.25 120 1 0.0 0.61 0.61 ip.ip.ip.ip h2 idle,
streams: 0/0/0/0/0 (open/recv/resp/push/rst)
16-0 28243 0/15/15 K 0.22 8 1 0.0 0.39 0.39 ip.ip.ip.ip h2 idle,
streams: 0/0/0/0/0 (open/recv/resp/push/rst)
17-0 28245 0/25/25 K 0.40 278 1 0.0 1.13 1.13 ip.ip.ip.ip h2 idle,
streams: 0/0/0/0/0 (open/recv/resp/push/rst)
18-0 28246 0/46/46 K 0.52 35 54 0.0 1.53 1.53 ip.ip.ip.ip h2 idle,
streams: 0/0/0/0/0 (open/recv/resp/push/rst)
19-0 28250 0/7/7 K 0.12 58 0 0.0 0.02 0.02 ip.ip.ip.ip h2 idle,
streams: 0/0/0/0/0 (open/recv/resp/push/rst)
20-0 28277 0/3/3 K 0.24 243 66 0.0 0.23 0.23 ip.ip.ip.ip h2 idle,
streams: 0/0/0/0/0 (open/recv/resp/push/rst)
21-0 28278 0/8/8 K 0.15 102 1 0.0 0.29 0.29 ip.ip.ip.ip h2 idle,
streams: 0/0/0/0/0 (open/recv/resp/push/rst)
22-0 28280 0/5/5 K 0.12 18 1 0.0 0.31 0.31 ip.ip.ip.ip h2 idle,
streams: 0/0/0/0/0 (open/recv/resp/push/rst)
Some servers have hundreds of this, never noticed this before.
This connections have status K or W. Ist this a kind of attack to
reach MaxRequestWorkers?
It seems the number of this connections can be reduced by reducing
H2MaxWorkerIdleSeconds to a lower value.
Apacheversion is 2.4.27.
What should i do now?
it seems that i found problem. it looks like standard-dos with
slowloris. i think i just was confused by mod_http2 output. deactivating
http2 just shows same problem with http1.1
mod_qos is a really good helper for this kind of problems.
Thanks,
Hajo
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