如何排除 syslog-ng 中的給定行？

我需要在消息文件中排除給定的行：

Oct 25 04:09:23 SERVERNAME PFILTER-DROP: IN=ifeth4 OUT= MAC=ff:ff:ff:ff:ff:ff:AA:AA:AA:AA:AA:AA:AA:AA SRC=192.168.202.4 DST=192.168.202.255 LEN=238 TOS=0x00 PREC=0x00 TTL=64 ID=0 DF PROTO=UDP SPT=32776 DPT=705 LEN=218 
Oct 25 04:09:23 SERVERNAME PFILTER-DROP: IN=ifeth4 OUT= MAC=ff:ff:ff:ff:ff:ff:AA:AA:AA:AA:AA:AA:AA:AA SRC=192.168.202.6 DST=192.168.202.255 LEN=183 TOS=0x00 PREC=0x00 TTL=64 ID=0 DF PROTO=UDP SPT=32770 DPT=700 LEN=163 
Oct 25 04:09:23 SERVERNAME PFILTER-DROP: IN=ifeth4 OUT= MAC=ff:ff:ff:ff:ff:ff:AA:AA:AA:AA:AA:AA:AA:AA SRC=192.168.202.8 DST=192.168.202.255 LEN=176 TOS=0x00 PREC=0x00 TTL=64 ID=0 DF PROTO=UDP SPT=32768 DPT=714 LEN=156 
Oct 25 04:09:23 SERVERNAME PFILTER-DROP: IN=ifeth4 OUT= MAC=ff:ff:ff:ff:ff:ff:AA:AA:AA:AA:AA:AA:AA:AA SRC=192.168.202.10 DST=192.168.202.255 LEN=175 TOS=0x00 PREC=0x00 TTL=64 ID=0 DF PROTO=UDP SPT=33628 DPT=715 LEN=155 
Oct 25 04:09:23 SERVERNAME PFILTER-DROP: IN=ifeth4 OUT= MAC=ff:ff:ff:ff:ff:ff:AA:AA:AA:AA:AA:AA:AA:AA SRC=192.168.202.30 DST=192.168.202.255 LEN=185 TOS=0x00 PREC=0x00 TTL=64 ID=0 DF PROTO=UDP SPT=32770 DPT=713 LEN=165 
Oct 25 04:09:23 SERVERNAME PFILTER-DROP: IN=ifeth4 OUT= MAC=ff:ff:ff:ff:ff:ff:AA:AA:AA:AA:AA:AA:AA:AA SRC=192.168.202.34 DST=192.168.202.255 LEN=237 TOS=0x00 PREC=0x00 TTL=64 ID=0 DF PROTO=UDP SPT=32781 DPT=704 LEN=217 

它們是 afaik heartbeat udp 消息，但日誌中不需要它們。

# rpm -qa | grep -i syslog-ng
Security.syslog-ng-1.6.8.0-1
# uname -a
Linux SERVERNAME 2.6.5-7.325-bigsmp #1 SMP Tue Jan 18 23:36:49 UTC 2011 i686 i686 i386 GNU/Linux
# cat /etc/SuSE-release 
SUSE LINUX Enterprise Server 9 (i586)
VERSION = 9
PATCHLEVEL = 4

**問：**如何從 /var/log/messages 中排除這類消息？

前：

SERVER:/etc/syslog-ng # tail -3 syslog-ng.conf
#
#
log { source(src); destination(/var/log/messages); };
SERVER:/etc/syslog-ng # 

編輯 syslog-ng.conf 文件：

vi /etc/syslog-ng/syslog-ng.conf

後：

SERVER:/etc/syslog-ng # tail -3 syslog-ng.conf
#log { source(src); destination(/var/log/messages); };
filter heartbeat_filter { not match("PFILTER-DROP") and not match("DST=192.168.202.255") and not match("PROTO=UDP"); }; 
log { source(src); filter(heartbeat_filter); destination(/var/log/messages); };
SERVER:/etc/syslog-ng # 

重啟系統日誌-NG

/etc/init.d/syslog restart # or whatever you use to restart syslog-ng
# now check

需要時旋轉

logrotate /etc/logrotate.conf

引用自：https://unix.stackexchange.com/questions/52860