데비안 기반 라우터에서 Snort 성능을 조정하려고합니다. 나는 다음과 같은 것들을보고 있었다 :
snort packet recv contents failure: No buffer space available
그래서 버퍼를 8M으로 올렸고 작동하지 않을 때 http://fasterdata.es.net/fasterdata/host-tuning/linux/ 의 튜닝 가이드에 따라 16M을 시도했습니다 .
#!/bin/sh -e
#
# rc.local
#
# This script is executed at the end of each multiuser runlevel.
# Make sure that the script will "exit 0" on success or any other
# value on error.
#
# In order to enable or disable this script just change the execution
# bits.
#
# By default this script does nothing.
# Increase TCP Buffers to 16 MB
sysctl -w net.core.rmem_default='16777216'
sysctl -w net.core.wmem_default='16777216'
sysctl -w net.core.rmem_max='16777216'
sysctl -w net.core.wmem_max='16777216'
sysctl -w net.ipv4.tcp_wmem='1048576 4194304 16777216'
sysctl -w net.ipv4.tcp_rmem='1048576 4194304 16777216'
sysctl -w net.core.netdev_max_backlog='30000'
exit 0
이제 "버퍼 공간 없음"로그 항목이 표시되지 않지만 새로운 항목이 있습니다.
net_ratelimit: 44 callbacks suppressed
같은 시간대의 유일한 다른 메시지는 이러한 화성인 일 것입니다. 아마도 이것이 억제되고있는 것일까 요?
Jun 4 07:09:36 ilium ntpd_intres[3575]: host name not found: 0.us.pool.ntp.org
Jun 4 14:17:36 ilium kernel: [25743.259951] net_ratelimit: 44 callbacks suppressed
Jun 4 14:17:36 ilium kernel: [25743.259955] martian source 216.59.11.21 from 127.0.0.1, on dev eth0
Jun 4 14:17:36 ilium kernel: [25743.259956] ll header: 00:30:48:7c:f8:10:00:24:c4:49:8d:00:08:00
Jun 4 14:17:58 ilium kernel: [25765.055449] martian source 216.59.11.21 from 127.0.0.1, on dev eth0
Jun 4 14:17:58 ilium kernel: [25765.055451] ll header: 00:30:48:7c:f8:10:00:24:c4:49:8d:00:08:00
Jun 4 14:18:43 ilium kernel: [25809.998978] martian source 216.59.11.21 from 127.0.0.1, on dev eth0
Jun 4 14:18:43 ilium kernel: [25809.998980] ll header: 00:30:48:7c:f8:10:00:24:c4:49:8d:00:08:00
Jun 4 14:24:11 ilium kernel: [26138.700143] martian source 216.59.11.71 from 127.0.0.1, on dev eth0
Jun 4 14:24:11 ilium kernel: [26138.700145] ll header: 00:30:48:7c:f8:10:00:24:c4:49:8d:00:08:00
Jun 4 14:28:42 ilium kernel: [26409.130701] martian source 216.59.11.71 from 127.0.0.1, on dev eth0
Jun 4 14:28:42 ilium kernel: [26409.130703] ll header: 00:30:48:7c:f8:10:00:24:c4:49:8d:00:08:00
__ratelimit: # callbacks supressed