Saya baru-baru ini memperhatikan sejumlah besar blok UFW berulang di syslog saya. Ini mengejutkan saya karena saya tidak memiliki aturan UFW yang ditetapkan:
$ sudo ufw status verbose
Status: active
Logging: on (low)
Default: deny (incoming), allow (outgoing)
New profiles: skip
Bisakah seseorang yang lebih berpengalaman dengan konfigurasi firewall di Ubuntu / Linux tolong katakan padaku mengapa saya mendapatkan entri ini?
Apr 7 20:01:04 mhcUBN kernel: [18234.747861] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:00:00:01:00:04:0e:ef:71:fe:08:00 SRC=192.168.178.1 DST=224.0.0.1 LEN=36 TOS=0x00 PREC=0xC0 TTL=1 ID=3586 DF PROTO=2
Apr 7 20:03:09 mhcUBN kernel: [18359.541595] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:00:00:01:00:04:0e:ef:71:fe:08:00 SRC=192.168.178.1 DST=224.0.0.1 LEN=36 TOS=0x00 PREC=0xC0 TTL=1 ID=3587 DF PROTO=2
Apr 7 20:05:14 mhcUBN kernel: [18484.335607] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:00:00:01:00:04:0e:ef:71:fe:08:00 SRC=192.168.178.1 DST=224.0.0.1 LEN=36 TOS=0x00 PREC=0xC0 TTL=1 ID=3588 DF PROTO=2
Apr 7 20:07:19 mhcUBN kernel: [18609.129970] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:00:00:01:00:04:0e:ef:71:fe:08:00 SRC=192.168.178.1 DST=224.0.0.1 LEN=36 TOS=0x00 PREC=0xC0 TTL=1 ID=3589 DF PROTO=2
Apr 7 20:09:24 mhcUBN kernel: [18733.923467] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:00:00:01:00:04:0e:ef:71:fe:08:00 SRC=192.168.178.1 DST=224.0.0.1 LEN=36 TOS=0x00 PREC=0xC0 TTL=1 ID=3590 DF PROTO=2
Apr 7 20:10:01 mhcUBN CRON[31522]: (mhc) CMD ("/home/mhc/.scripts/Customization/Powersaving/battmonitor")
Apr 7 20:11:29 mhcUBN kernel: [18858.717504] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:00:00:01:00:04:0e:ef:71:fe:08:00 SRC=192.168.178.1 DST=224.0.0.1 LEN=36 TOS=0x00 PREC=0xC0 TTL=1 ID=3591 DF PROTO=2
Apr 7 20:13:34 mhcUBN kernel: [18983.510575] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:00:00:01:00:04:0e:ef:71:fe:08:00 SRC=192.168.178.1 DST=224.0.0.1 LEN=36 TOS=0x00 PREC=0xC0 TTL=1 ID=3592 DF PROTO=2
Apr 7 20:15:39 mhcUBN kernel: [19108.306349] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:00:00:01:00:04:0e:ef:71:fe:08:00 SRC=192.168.178.1 DST=224.0.0.1 LEN=36 TOS=0x00 PREC=0xC0 TTL=1 ID=3593 DF PROTO=2
Apr 7 20:17:01 mhcUBN CRON[582]: (root) CMD ( cd / && run-parts --report /etc/cron.hourly)
Apr 7 20:17:44 mhcUBN kernel: [19233.100675] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:00:00:01:00:04:0e:ef:71:fe:08:00 SRC=192.168.178.1 DST=224.0.0.1 LEN=36 TOS=0x00 PREC=0xC0 TTL=1 ID=3594 DF PROTO=2
Apr 7 20:19:49 mhcUBN kernel: [19357.893801] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:00:00:01:00:04:0e:ef:71:fe:08:00 SRC=192.168.178.1 DST=224.0.0.1 LEN=36 TOS=0x00 PREC=0xC0 TTL=1 ID=3595 DF PROTO=2
Apr 7 20:20:01 mhcUBN CRON[1272]: (mhc) CMD ("/home/mhc/.scripts/Customization/Powersaving/battmonitor")
Apr 7 20:21:54 mhcUBN kernel: [19482.686449] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:00:00:01:00:04:0e:ef:71:fe:08:00 SRC=192.168.178.1 DST=224.0.0.1 LEN=36 TOS=0x00 PREC=0xC0 TTL=1 ID=3596 DF PROTO=2
Apr 7 20:23:59 mhcUBN kernel: [19607.480499] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:00:00:01:00:04:0e:ef:71:fe:08:00 SRC=192.168.178.1 DST=224.0.0.1 LEN=36 TOS=0x00 PREC=0xC0 TTL=1 ID=3597 DF PROTO=2
Apr 7 20:26:04 mhcUBN kernel: [19732.274979] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:00:00:01:00:04:0e:ef:71:fe:08:00 SRC=192.168.178.1 DST=224.0.0.1 LEN=36 TOS=0x00 PREC=0xC0 TTL=1 ID=3598 DF PROTO=2
Apr 7 20:28:09 mhcUBN kernel: [19857.068910] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:00:00:01:00:04:0e:ef:71:fe:08:00 SRC=192.168.178.1 DST=224.0.0.1 LEN=36 TOS=0x00 PREC=0xC0 TTL=1 ID=3599 DF PROTO=2
Apr 7 20:30:01 mhcUBN CRON[3484]: (mhc) CMD ("/home/mhc/.scripts/Customization/Powersaving/battmonitor")
Apr 7 20:30:14 mhcUBN kernel: [19981.862231] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:00:00:01:00:04:0e:ef:71:fe:08:00 SRC=192.168.178.1 DST=224.0.0.1 LEN=36 TOS=0x00 PREC=0xC0 TTL=1 ID=3600 DF PROTO=2
Apr 7 20:32:19 mhcUBN kernel: [20106.657165] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:00:00:01:00:04:0e:ef:71:fe:08:00 SRC=192.168.178.1 DST=224.0.0.1 LEN=36 TOS=0x00 PREC=0xC0 TTL=1 ID=3601 DF PROTO=2
Apr 7 20:34:24 mhcUBN kernel: [20231.450561] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:00:00:01:00:04:0e:ef:71:fe:08:00 SRC=192.168.178.1 DST=224.0.0.1 LEN=36 TOS=0x00 PREC=0xC0 TTL=1 ID=3602 DF PROTO=2
Apr 7 20:36:29 mhcUBN kernel: [20356.244475] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:00:00:01:00:04:0e:ef:71:fe:08:00 SRC=192.168.178.1 DST=224.0.0.1 LEN=36 TOS=0x00 PREC=0xC0 TTL=1 ID=3603 DF PROTO=2
Apr 7 20:38:34 mhcUBN kernel: [20481.038479] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:00:00:01:00:04:0e:ef:71:fe:08:00 SRC=192.168.178.1 DST=224.0.0.1 LEN=36 TOS=0x00 PREC=0xC0 TTL=1 ID=3604 DF PROTO=2
Apr 7 20:40:01 mhcUBN CRON[5702]: (mhc) CMD ("/home/mhc/.scripts/Customization/Powersaving/battmonitor")
Apr 7 20:40:39 mhcUBN kernel: [20605.832618] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:00:00:01:00:04:0e:ef:71:fe:08:00 SRC=192.168.178.1 DST=224.0.0.1 LEN=36 TOS=0x00 PREC=0xC0 TTL=1 ID=3605 DF PROTO=2
Apr 7 20:42:44 mhcUBN kernel: [20730.626727] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:00:00:01:00:04:0e:ef:71:fe:08:00 SRC=192.168.178.1 DST=224.0.0.1 LEN=36 TOS=0x00 PREC=0xC0 TTL=1 ID=3606 DF PROTO=2
Apr 7 20:44:49 mhcUBN kernel: [20855.419706] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:00:00:01:00:04:0e:ef:71:fe:08:00 SRC=192.168.178.1 DST=224.0.0.1 LEN=36 TOS=0x00 PREC=0xC0 TTL=1 ID=3607 DF PROTO=2
Apr 7 20:46:54 mhcUBN kernel: [20980.214309] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:00:00:01:00:04:0e:ef:71:fe:08:00 SRC=192.168.178.1 DST=224.0.0.1 LEN=36 TOS=0x00 PREC=0xC0 TTL=1 ID=3608 DF PROTO=2
Apr 7 20:48:59 mhcUBN kernel: [21105.008870] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:00:00:01:00:04:0e:ef:71:fe:08:00 SRC=192.168.178.1 DST=224.0.0.1 LEN=36 TOS=0x00 PREC=0xC0 TTL=1 ID=3609 DF PROTO=2
Saya telah menemukan utas ini yang mengarah ke masalah multicast:
http://ubuntuforums.org/showthread.php?t=1886913
https://bbs.archlinux.org/viewtopic.php?id=142525
https://issues.apache.org/jira/browse/TS-775
Saya bukan ahli jaringan dengan cara apa pun dan tidak benar memahami apa yang sebenarnya terjadi. Jika ada yang "menerjemahkan" ini sehingga saya memahami apa yang terjadi, saya akan sangat senang.
Anda dapat mencegah pembuatan entri log baru dengan perintah ini (berfungsi untuk saya pada 13.10 64 bit):
sumber