How to log only iptables messages into my /var/log/iptables.log?

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I want to log only iptables message into /var/log/iptables.log.

Here is my way.



sudo vim /etc/rsyslog.conf
kern.* -/var/log/iptables.log
sudo vim /etc/rsyslog.d/iptables.conf
:msg, startswith, "NETFILTER" -/var/log/iptables.log
& ~
sudo iptables -A OUTPUT -m limit --limit 10/m -j LOG --log-prefix NETFILTER
sudo iptables-save > /etc/iptables/rules.v4
sudo systemctl restart rsyslog


And to clear all log messages in /var/log/iptables.log.



sudo echo "" |sudo tee /var/log/iptables.log


Now to reboot pc.



sudo cat /var/log/iptables.log
Nov 19 09:21:29 MiWiFi kernel: [ 7.069752] input: Eee PC WMI hotkeys as /devices/platform/eeepc-wmi/input/input15
Nov 19 09:21:29 MiWiFi kernel: [ 7.069918] asus_wmi: Number of fans: 1
Nov 19 09:21:29 MiWiFi kernel: [ 7.264095] Adding 1952764k swap on /dev/sda5. Priority:-1 extents:1 across:1952764k FS
Nov 19 09:21:29 MiWiFi kernel: [ 11.464093] ip6_tables: (C) 2000-2006 Netfilter Core Team
Nov 19 09:21:31 MiWiFi kernel: [ 13.153842] Netfilter messages via NETLINK v0.30.
Nov 19 09:21:31 MiWiFi kernel: [ 13.529229] r8169 0000:03:00.0: firmware: failed to load rtl_nic/rtl8168g-2.fw (-2)
Nov 19 09:21:31 MiWiFi kernel: [ 13.529300] r8169 0000:03:00.0: Direct firmware load for rtl_nic/rtl8168g-2.fw failed with error -2
Nov 19 09:21:31 MiWiFi kernel: [ 13.529307] r8169 0000:03:00.0 enp3s0: unable to load firmware patch rtl_nic/rtl8168g-2.fw (-2)
Nov 19 09:21:31 MiWiFi kernel: [ 13.542639] r8169 0000:03:00.0 enp3s0: link down
Nov 19 09:21:31 MiWiFi kernel: [ 13.542657] r8169 0000:03:00.0 enp3s0: link down
Nov 19 09:21:31 MiWiFi kernel: [ 13.542749] IPv6: ADDRCONF(NETDEV_UP): enp3s0: link is not ready
Nov 19 09:21:33 MiWiFi kernel: [ 15.517613] NET: Registered protocol family 4
Nov 19 09:21:33 MiWiFi kernel: [ 15.543358] NET: Registered protocol family 3
Nov 19 09:21:33 MiWiFi kernel: [ 15.573343] NET: Registered protocol family 5
Nov 19 09:21:34 MiWiFi kernel: [ 16.105505] r8169 0000:03:00.0 enp3s0: link up
Nov 19 09:21:34 MiWiFi kernel: [ 16.105513] IPv6: ADDRCONF(NETDEV_CHANGE): enp3s0: link becomes ready
Nov 19 09:21:36 MiWiFi kernel: [ 18.128165] NETFILTERIN= OUT=enp3s0 SRC=192.168.31.52 DST=224.0.0.22 LEN=40 TOS=0x00 PREC=0xC0 TTL=1 ID=0 DF PROTO=2 MARK=0xd4 
Nov 19 09:21:36 MiWiFi kernel: [ 18.173678] NETFILTERIN= OUT=enp3s0 SRC=192.168.31.52 DST=224.0.0.251 LEN=236 TOS=0x00 PREC=0x00 TTL=255 ID=65025 DF PROTO=UDP SPT=5353 DPT=5353 LEN=216 
Nov 19 09:21:36 MiWiFi kernel: [ 18.424244] NETFILTERIN= OUT=enp3s0 SRC=192.168.31.52 DST=224.0.0.251 LEN=236 TOS=0x00 PREC=0x00 TTL=255 ID=65028 DF PROTO=UDP SPT=5353 DPT=5353 LEN=216 
Nov 19 09:21:36 MiWiFi kernel: [ 18.674976] NETFILTERIN= OUT=enp3s0 SRC=192.168.31.52 DST=224.0.0.251 LEN=236 TOS=0x00 PREC=0x00 TTL=255 ID=65082 DF PROTO=UDP SPT=5353 DPT=5353 LEN=216 
Nov 19 09:21:36 MiWiFi kernel: [ 18.812203] NETFILTERIN= OUT=enp3s0 SRC=192.168.31.52 DST=224.0.0.22 LEN=40 TOS=0x00 PREC=0xC0 TTL=1 ID=0 DF PROTO=2 MARK=0xd4 
Nov 19 09:21:42 MiWiFi kernel: [ 24.142666] fuse init (API version 7.26)
Nov 19 09:21:56 MiWiFi kernel: [ 38.904380] NETFILTERIN= OUT=lo SRC=127.0.0.1 DST=127.0.0.1 LEN=60 TOS=0x00 PREC=0x00 TTL=64 ID=2471 DF PROTO=TCP SPT=59188 DPT=4101 WINDOW=43690 RES=0x00 SYN URGP=0


Part 1 is the info on kernel start for my pc such as following.



Nov 19 09:21:29 MiWiFi kernel: [ 7.069752] input: Eee PC WMI hotkeys as /devices/platform/eeepc-wmi/input/input15
Nov 19 09:21:29 MiWiFi kernel: [ 7.069918] asus_wmi: Number of fans: 1
Nov 19 09:21:29 MiWiFi kernel: [ 7.264095] Adding 1952764k swap on /dev/sda5. Priority:-1 extents:1 across:1952764k FS
Nov 19 09:21:29 MiWiFi kernel: [ 11.464093] ip6_tables: (C) 2000-2006 Netfilter Core Team
Nov 19 09:21:31 MiWiFi kernel: [ 13.153842] Netfilter messages via NETLINK v0.30.


Part 2 is the info on iptables messages for my pc such as following.



Nov 19 09:21:36 MiWiFi kernel: [ 18.812203] NETFILTERIN= OUT=enp3s0 SRC=192.168.31.52 DST=224.0.0.22 LEN=40 TOS=0x00 PREC=0xC0 TTL=1 ID=0 DF PROTO=2 MARK=0xd4 
Nov 19 09:21:56 MiWiFi kernel: [ 38.904380] NETFILTERIN= OUT=lo SRC=127.0.0.1 DST=127.0.0.1 LEN=60 TOS=0x00 PREC=0x00 TTL=64 ID=2471 DF PROTO=TCP SPT=59188 DPT=4101 WINDOW=43690 RES=0x00 SYN URGP=0


How to log only iptables messages (part 2 instead of part 1) into my /var/log/iptables.log ,not contains both kernel info and iptables info in /var/log/iptables.log ?




iptables logs rsyslog




share|improve this question




















  • You need to remove the line kern.* -/var/log/iptables.log if you dont want all kernel messages in that log file.
    – meuh
    Nov 19 '17 at 7:16










  • if you remove kern.* -/var/log/iptables.log ,both part1 and part2 will not be written into iptables.log.
    – scrapy
    Nov 19 '17 at 11:18










  • Stop rsyslog and run it by hand with debug: sudo rsyslogd -dn
    – meuh
    Nov 19 '17 at 14:08














up vote
0
down vote

favorite












I want to log only iptables message into /var/log/iptables.log.

Here is my way.



sudo vim /etc/rsyslog.conf
kern.* -/var/log/iptables.log
sudo vim /etc/rsyslog.d/iptables.conf
:msg, startswith, "NETFILTER" -/var/log/iptables.log
& ~
sudo iptables -A OUTPUT -m limit --limit 10/m -j LOG --log-prefix NETFILTER
sudo iptables-save > /etc/iptables/rules.v4
sudo systemctl restart rsyslog


And to clear all log messages in /var/log/iptables.log.



sudo echo "" |sudo tee /var/log/iptables.log


Now to reboot pc.



sudo cat /var/log/iptables.log
Nov 19 09:21:29 MiWiFi kernel: [ 7.069752] input: Eee PC WMI hotkeys as /devices/platform/eeepc-wmi/input/input15
Nov 19 09:21:29 MiWiFi kernel: [ 7.069918] asus_wmi: Number of fans: 1
Nov 19 09:21:29 MiWiFi kernel: [ 7.264095] Adding 1952764k swap on /dev/sda5. Priority:-1 extents:1 across:1952764k FS
Nov 19 09:21:29 MiWiFi kernel: [ 11.464093] ip6_tables: (C) 2000-2006 Netfilter Core Team
Nov 19 09:21:31 MiWiFi kernel: [ 13.153842] Netfilter messages via NETLINK v0.30.
Nov 19 09:21:31 MiWiFi kernel: [ 13.529229] r8169 0000:03:00.0: firmware: failed to load rtl_nic/rtl8168g-2.fw (-2)
Nov 19 09:21:31 MiWiFi kernel: [ 13.529300] r8169 0000:03:00.0: Direct firmware load for rtl_nic/rtl8168g-2.fw failed with error -2
Nov 19 09:21:31 MiWiFi kernel: [ 13.529307] r8169 0000:03:00.0 enp3s0: unable to load firmware patch rtl_nic/rtl8168g-2.fw (-2)
Nov 19 09:21:31 MiWiFi kernel: [ 13.542639] r8169 0000:03:00.0 enp3s0: link down
Nov 19 09:21:31 MiWiFi kernel: [ 13.542657] r8169 0000:03:00.0 enp3s0: link down
Nov 19 09:21:31 MiWiFi kernel: [ 13.542749] IPv6: ADDRCONF(NETDEV_UP): enp3s0: link is not ready
Nov 19 09:21:33 MiWiFi kernel: [ 15.517613] NET: Registered protocol family 4
Nov 19 09:21:33 MiWiFi kernel: [ 15.543358] NET: Registered protocol family 3
Nov 19 09:21:33 MiWiFi kernel: [ 15.573343] NET: Registered protocol family 5
Nov 19 09:21:34 MiWiFi kernel: [ 16.105505] r8169 0000:03:00.0 enp3s0: link up
Nov 19 09:21:34 MiWiFi kernel: [ 16.105513] IPv6: ADDRCONF(NETDEV_CHANGE): enp3s0: link becomes ready
Nov 19 09:21:36 MiWiFi kernel: [ 18.128165] NETFILTERIN= OUT=enp3s0 SRC=192.168.31.52 DST=224.0.0.22 LEN=40 TOS=0x00 PREC=0xC0 TTL=1 ID=0 DF PROTO=2 MARK=0xd4 
Nov 19 09:21:36 MiWiFi kernel: [ 18.173678] NETFILTERIN= OUT=enp3s0 SRC=192.168.31.52 DST=224.0.0.251 LEN=236 TOS=0x00 PREC=0x00 TTL=255 ID=65025 DF PROTO=UDP SPT=5353 DPT=5353 LEN=216 
Nov 19 09:21:36 MiWiFi kernel: [ 18.424244] NETFILTERIN= OUT=enp3s0 SRC=192.168.31.52 DST=224.0.0.251 LEN=236 TOS=0x00 PREC=0x00 TTL=255 ID=65028 DF PROTO=UDP SPT=5353 DPT=5353 LEN=216 
Nov 19 09:21:36 MiWiFi kernel: [ 18.674976] NETFILTERIN= OUT=enp3s0 SRC=192.168.31.52 DST=224.0.0.251 LEN=236 TOS=0x00 PREC=0x00 TTL=255 ID=65082 DF PROTO=UDP SPT=5353 DPT=5353 LEN=216 
Nov 19 09:21:36 MiWiFi kernel: [ 18.812203] NETFILTERIN= OUT=enp3s0 SRC=192.168.31.52 DST=224.0.0.22 LEN=40 TOS=0x00 PREC=0xC0 TTL=1 ID=0 DF PROTO=2 MARK=0xd4 
Nov 19 09:21:42 MiWiFi kernel: [ 24.142666] fuse init (API version 7.26)
Nov 19 09:21:56 MiWiFi kernel: [ 38.904380] NETFILTERIN= OUT=lo SRC=127.0.0.1 DST=127.0.0.1 LEN=60 TOS=0x00 PREC=0x00 TTL=64 ID=2471 DF PROTO=TCP SPT=59188 DPT=4101 WINDOW=43690 RES=0x00 SYN URGP=0


Part 1 is the info on kernel start for my pc such as following.



Nov 19 09:21:29 MiWiFi kernel: [ 7.069752] input: Eee PC WMI hotkeys as /devices/platform/eeepc-wmi/input/input15
Nov 19 09:21:29 MiWiFi kernel: [ 7.069918] asus_wmi: Number of fans: 1
Nov 19 09:21:29 MiWiFi kernel: [ 7.264095] Adding 1952764k swap on /dev/sda5. Priority:-1 extents:1 across:1952764k FS
Nov 19 09:21:29 MiWiFi kernel: [ 11.464093] ip6_tables: (C) 2000-2006 Netfilter Core Team
Nov 19 09:21:31 MiWiFi kernel: [ 13.153842] Netfilter messages via NETLINK v0.30.


Part 2 is the info on iptables messages for my pc such as following.



Nov 19 09:21:36 MiWiFi kernel: [ 18.812203] NETFILTERIN= OUT=enp3s0 SRC=192.168.31.52 DST=224.0.0.22 LEN=40 TOS=0x00 PREC=0xC0 TTL=1 ID=0 DF PROTO=2 MARK=0xd4 
Nov 19 09:21:56 MiWiFi kernel: [ 38.904380] NETFILTERIN= OUT=lo SRC=127.0.0.1 DST=127.0.0.1 LEN=60 TOS=0x00 PREC=0x00 TTL=64 ID=2471 DF PROTO=TCP SPT=59188 DPT=4101 WINDOW=43690 RES=0x00 SYN URGP=0


How to log only iptables messages (part 2 instead of part 1) into my /var/log/iptables.log ,not contains both kernel info and iptables info in /var/log/iptables.log ?




iptables logs rsyslog




share|improve this question




















  • You need to remove the line kern.* -/var/log/iptables.log if you dont want all kernel messages in that log file.
    – meuh
    Nov 19 '17 at 7:16










  • if you remove kern.* -/var/log/iptables.log ,both part1 and part2 will not be written into iptables.log.
    – scrapy
    Nov 19 '17 at 11:18










  • Stop rsyslog and run it by hand with debug: sudo rsyslogd -dn
    – meuh
    Nov 19 '17 at 14:08












up vote
0
down vote

favorite









up vote
0
down vote

favorite











I want to log only iptables message into /var/log/iptables.log.

Here is my way.



sudo vim /etc/rsyslog.conf
kern.* -/var/log/iptables.log
sudo vim /etc/rsyslog.d/iptables.conf
:msg, startswith, "NETFILTER" -/var/log/iptables.log
& ~
sudo iptables -A OUTPUT -m limit --limit 10/m -j LOG --log-prefix NETFILTER
sudo iptables-save > /etc/iptables/rules.v4
sudo systemctl restart rsyslog


And to clear all log messages in /var/log/iptables.log.



sudo echo "" |sudo tee /var/log/iptables.log


Now to reboot pc.



sudo cat /var/log/iptables.log
Nov 19 09:21:29 MiWiFi kernel: [ 7.069752] input: Eee PC WMI hotkeys as /devices/platform/eeepc-wmi/input/input15
Nov 19 09:21:29 MiWiFi kernel: [ 7.069918] asus_wmi: Number of fans: 1
Nov 19 09:21:29 MiWiFi kernel: [ 7.264095] Adding 1952764k swap on /dev/sda5. Priority:-1 extents:1 across:1952764k FS
Nov 19 09:21:29 MiWiFi kernel: [ 11.464093] ip6_tables: (C) 2000-2006 Netfilter Core Team
Nov 19 09:21:31 MiWiFi kernel: [ 13.153842] Netfilter messages via NETLINK v0.30.
Nov 19 09:21:31 MiWiFi kernel: [ 13.529229] r8169 0000:03:00.0: firmware: failed to load rtl_nic/rtl8168g-2.fw (-2)
Nov 19 09:21:31 MiWiFi kernel: [ 13.529300] r8169 0000:03:00.0: Direct firmware load for rtl_nic/rtl8168g-2.fw failed with error -2
Nov 19 09:21:31 MiWiFi kernel: [ 13.529307] r8169 0000:03:00.0 enp3s0: unable to load firmware patch rtl_nic/rtl8168g-2.fw (-2)
Nov 19 09:21:31 MiWiFi kernel: [ 13.542639] r8169 0000:03:00.0 enp3s0: link down
Nov 19 09:21:31 MiWiFi kernel: [ 13.542657] r8169 0000:03:00.0 enp3s0: link down
Nov 19 09:21:31 MiWiFi kernel: [ 13.542749] IPv6: ADDRCONF(NETDEV_UP): enp3s0: link is not ready
Nov 19 09:21:33 MiWiFi kernel: [ 15.517613] NET: Registered protocol family 4
Nov 19 09:21:33 MiWiFi kernel: [ 15.543358] NET: Registered protocol family 3
Nov 19 09:21:33 MiWiFi kernel: [ 15.573343] NET: Registered protocol family 5
Nov 19 09:21:34 MiWiFi kernel: [ 16.105505] r8169 0000:03:00.0 enp3s0: link up
Nov 19 09:21:34 MiWiFi kernel: [ 16.105513] IPv6: ADDRCONF(NETDEV_CHANGE): enp3s0: link becomes ready
Nov 19 09:21:36 MiWiFi kernel: [ 18.128165] NETFILTERIN= OUT=enp3s0 SRC=192.168.31.52 DST=224.0.0.22 LEN=40 TOS=0x00 PREC=0xC0 TTL=1 ID=0 DF PROTO=2 MARK=0xd4 
Nov 19 09:21:36 MiWiFi kernel: [ 18.173678] NETFILTERIN= OUT=enp3s0 SRC=192.168.31.52 DST=224.0.0.251 LEN=236 TOS=0x00 PREC=0x00 TTL=255 ID=65025 DF PROTO=UDP SPT=5353 DPT=5353 LEN=216 
Nov 19 09:21:36 MiWiFi kernel: [ 18.424244] NETFILTERIN= OUT=enp3s0 SRC=192.168.31.52 DST=224.0.0.251 LEN=236 TOS=0x00 PREC=0x00 TTL=255 ID=65028 DF PROTO=UDP SPT=5353 DPT=5353 LEN=216 
Nov 19 09:21:36 MiWiFi kernel: [ 18.674976] NETFILTERIN= OUT=enp3s0 SRC=192.168.31.52 DST=224.0.0.251 LEN=236 TOS=0x00 PREC=0x00 TTL=255 ID=65082 DF PROTO=UDP SPT=5353 DPT=5353 LEN=216 
Nov 19 09:21:36 MiWiFi kernel: [ 18.812203] NETFILTERIN= OUT=enp3s0 SRC=192.168.31.52 DST=224.0.0.22 LEN=40 TOS=0x00 PREC=0xC0 TTL=1 ID=0 DF PROTO=2 MARK=0xd4 
Nov 19 09:21:42 MiWiFi kernel: [ 24.142666] fuse init (API version 7.26)
Nov 19 09:21:56 MiWiFi kernel: [ 38.904380] NETFILTERIN= OUT=lo SRC=127.0.0.1 DST=127.0.0.1 LEN=60 TOS=0x00 PREC=0x00 TTL=64 ID=2471 DF PROTO=TCP SPT=59188 DPT=4101 WINDOW=43690 RES=0x00 SYN URGP=0


Part 1 is the info on kernel start for my pc such as following.



Nov 19 09:21:29 MiWiFi kernel: [ 7.069752] input: Eee PC WMI hotkeys as /devices/platform/eeepc-wmi/input/input15
Nov 19 09:21:29 MiWiFi kernel: [ 7.069918] asus_wmi: Number of fans: 1
Nov 19 09:21:29 MiWiFi kernel: [ 7.264095] Adding 1952764k swap on /dev/sda5. Priority:-1 extents:1 across:1952764k FS
Nov 19 09:21:29 MiWiFi kernel: [ 11.464093] ip6_tables: (C) 2000-2006 Netfilter Core Team
Nov 19 09:21:31 MiWiFi kernel: [ 13.153842] Netfilter messages via NETLINK v0.30.


Part 2 is the info on iptables messages for my pc such as following.



Nov 19 09:21:36 MiWiFi kernel: [ 18.812203] NETFILTERIN= OUT=enp3s0 SRC=192.168.31.52 DST=224.0.0.22 LEN=40 TOS=0x00 PREC=0xC0 TTL=1 ID=0 DF PROTO=2 MARK=0xd4 
Nov 19 09:21:56 MiWiFi kernel: [ 38.904380] NETFILTERIN= OUT=lo SRC=127.0.0.1 DST=127.0.0.1 LEN=60 TOS=0x00 PREC=0x00 TTL=64 ID=2471 DF PROTO=TCP SPT=59188 DPT=4101 WINDOW=43690 RES=0x00 SYN URGP=0


How to log only iptables messages (part 2 instead of part 1) into my /var/log/iptables.log ,not contains both kernel info and iptables info in /var/log/iptables.log ?




iptables logs rsyslog




share|improve this question












I want to log only iptables message into /var/log/iptables.log.

Here is my way.



sudo vim /etc/rsyslog.conf
kern.* -/var/log/iptables.log
sudo vim /etc/rsyslog.d/iptables.conf
:msg, startswith, "NETFILTER" -/var/log/iptables.log
& ~
sudo iptables -A OUTPUT -m limit --limit 10/m -j LOG --log-prefix NETFILTER
sudo iptables-save > /etc/iptables/rules.v4
sudo systemctl restart rsyslog


And to clear all log messages in /var/log/iptables.log.



sudo echo "" |sudo tee /var/log/iptables.log


Now to reboot pc.



sudo cat /var/log/iptables.log
Nov 19 09:21:29 MiWiFi kernel: [ 7.069752] input: Eee PC WMI hotkeys as /devices/platform/eeepc-wmi/input/input15
Nov 19 09:21:29 MiWiFi kernel: [ 7.069918] asus_wmi: Number of fans: 1
Nov 19 09:21:29 MiWiFi kernel: [ 7.264095] Adding 1952764k swap on /dev/sda5. Priority:-1 extents:1 across:1952764k FS
Nov 19 09:21:29 MiWiFi kernel: [ 11.464093] ip6_tables: (C) 2000-2006 Netfilter Core Team
Nov 19 09:21:31 MiWiFi kernel: [ 13.153842] Netfilter messages via NETLINK v0.30.
Nov 19 09:21:31 MiWiFi kernel: [ 13.529229] r8169 0000:03:00.0: firmware: failed to load rtl_nic/rtl8168g-2.fw (-2)
Nov 19 09:21:31 MiWiFi kernel: [ 13.529300] r8169 0000:03:00.0: Direct firmware load for rtl_nic/rtl8168g-2.fw failed with error -2
Nov 19 09:21:31 MiWiFi kernel: [ 13.529307] r8169 0000:03:00.0 enp3s0: unable to load firmware patch rtl_nic/rtl8168g-2.fw (-2)
Nov 19 09:21:31 MiWiFi kernel: [ 13.542639] r8169 0000:03:00.0 enp3s0: link down
Nov 19 09:21:31 MiWiFi kernel: [ 13.542657] r8169 0000:03:00.0 enp3s0: link down
Nov 19 09:21:31 MiWiFi kernel: [ 13.542749] IPv6: ADDRCONF(NETDEV_UP): enp3s0: link is not ready
Nov 19 09:21:33 MiWiFi kernel: [ 15.517613] NET: Registered protocol family 4
Nov 19 09:21:33 MiWiFi kernel: [ 15.543358] NET: Registered protocol family 3
Nov 19 09:21:33 MiWiFi kernel: [ 15.573343] NET: Registered protocol family 5
Nov 19 09:21:34 MiWiFi kernel: [ 16.105505] r8169 0000:03:00.0 enp3s0: link up
Nov 19 09:21:34 MiWiFi kernel: [ 16.105513] IPv6: ADDRCONF(NETDEV_CHANGE): enp3s0: link becomes ready
Nov 19 09:21:36 MiWiFi kernel: [ 18.128165] NETFILTERIN= OUT=enp3s0 SRC=192.168.31.52 DST=224.0.0.22 LEN=40 TOS=0x00 PREC=0xC0 TTL=1 ID=0 DF PROTO=2 MARK=0xd4 
Nov 19 09:21:36 MiWiFi kernel: [ 18.173678] NETFILTERIN= OUT=enp3s0 SRC=192.168.31.52 DST=224.0.0.251 LEN=236 TOS=0x00 PREC=0x00 TTL=255 ID=65025 DF PROTO=UDP SPT=5353 DPT=5353 LEN=216 
Nov 19 09:21:36 MiWiFi kernel: [ 18.424244] NETFILTERIN= OUT=enp3s0 SRC=192.168.31.52 DST=224.0.0.251 LEN=236 TOS=0x00 PREC=0x00 TTL=255 ID=65028 DF PROTO=UDP SPT=5353 DPT=5353 LEN=216 
Nov 19 09:21:36 MiWiFi kernel: [ 18.674976] NETFILTERIN= OUT=enp3s0 SRC=192.168.31.52 DST=224.0.0.251 LEN=236 TOS=0x00 PREC=0x00 TTL=255 ID=65082 DF PROTO=UDP SPT=5353 DPT=5353 LEN=216 
Nov 19 09:21:36 MiWiFi kernel: [ 18.812203] NETFILTERIN= OUT=enp3s0 SRC=192.168.31.52 DST=224.0.0.22 LEN=40 TOS=0x00 PREC=0xC0 TTL=1 ID=0 DF PROTO=2 MARK=0xd4 
Nov 19 09:21:42 MiWiFi kernel: [ 24.142666] fuse init (API version 7.26)
Nov 19 09:21:56 MiWiFi kernel: [ 38.904380] NETFILTERIN= OUT=lo SRC=127.0.0.1 DST=127.0.0.1 LEN=60 TOS=0x00 PREC=0x00 TTL=64 ID=2471 DF PROTO=TCP SPT=59188 DPT=4101 WINDOW=43690 RES=0x00 SYN URGP=0


Part 1 is the info on kernel start for my pc such as following.



Nov 19 09:21:29 MiWiFi kernel: [ 7.069752] input: Eee PC WMI hotkeys as /devices/platform/eeepc-wmi/input/input15
Nov 19 09:21:29 MiWiFi kernel: [ 7.069918] asus_wmi: Number of fans: 1
Nov 19 09:21:29 MiWiFi kernel: [ 7.264095] Adding 1952764k swap on /dev/sda5. Priority:-1 extents:1 across:1952764k FS
Nov 19 09:21:29 MiWiFi kernel: [ 11.464093] ip6_tables: (C) 2000-2006 Netfilter Core Team
Nov 19 09:21:31 MiWiFi kernel: [ 13.153842] Netfilter messages via NETLINK v0.30.


Part 2 is the info on iptables messages for my pc such as following.



Nov 19 09:21:36 MiWiFi kernel: [ 18.812203] NETFILTERIN= OUT=enp3s0 SRC=192.168.31.52 DST=224.0.0.22 LEN=40 TOS=0x00 PREC=0xC0 TTL=1 ID=0 DF PROTO=2 MARK=0xd4 
Nov 19 09:21:56 MiWiFi kernel: [ 38.904380] NETFILTERIN= OUT=lo SRC=127.0.0.1 DST=127.0.0.1 LEN=60 TOS=0x00 PREC=0x00 TTL=64 ID=2471 DF PROTO=TCP SPT=59188 DPT=4101 WINDOW=43690 RES=0x00 SYN URGP=0


How to log only iptables messages (part 2 instead of part 1) into my /var/log/iptables.log ,not contains both kernel info and iptables info in /var/log/iptables.log ?





iptables logs rsyslog





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asked Nov 19 '17 at 6:43









scrapy

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  • You need to remove the line kern.* -/var/log/iptables.log if you dont want all kernel messages in that log file.
    – meuh
    Nov 19 '17 at 7:16










  • if you remove kern.* -/var/log/iptables.log ,both part1 and part2 will not be written into iptables.log.
    – scrapy
    Nov 19 '17 at 11:18










  • Stop rsyslog and run it by hand with debug: sudo rsyslogd -dn
    – meuh
    Nov 19 '17 at 14:08
















  • You need to remove the line kern.* -/var/log/iptables.log if you dont want all kernel messages in that log file.
    – meuh
    Nov 19 '17 at 7:16










  • if you remove kern.* -/var/log/iptables.log ,both part1 and part2 will not be written into iptables.log.
    – scrapy
    Nov 19 '17 at 11:18










  • Stop rsyslog and run it by hand with debug: sudo rsyslogd -dn
    – meuh
    Nov 19 '17 at 14:08















You need to remove the line kern.* -/var/log/iptables.log if you dont want all kernel messages in that log file.
– meuh
Nov 19 '17 at 7:16




You need to remove the line kern.* -/var/log/iptables.log if you dont want all kernel messages in that log file.
– meuh
Nov 19 '17 at 7:16












if you remove kern.* -/var/log/iptables.log ,both part1 and part2 will not be written into iptables.log.
– scrapy
Nov 19 '17 at 11:18




if you remove kern.* -/var/log/iptables.log ,both part1 and part2 will not be written into iptables.log.
– scrapy
Nov 19 '17 at 11:18












Stop rsyslog and run it by hand with debug: sudo rsyslogd -dn
– meuh
Nov 19 '17 at 14:08




Stop rsyslog and run it by hand with debug: sudo rsyslogd -dn
– meuh
Nov 19 '17 at 14:08















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