turn off IGMP multicast

English Network/Internet
1

my /var/log/firewall log file is full of lines concerning IGMP packets:
[size=3]
May 8 11:56:04 mercurio kernel: SFW2-INext-DROP-DEFLT IN=eth0 OUT= MAC=01:00:5e:00:00:01:00:13:49:7f:ca:75:08:00 SRC=172.28.21.2 DST=224.0.0.1 LEN=28 TOS=0x00 PREC=0x00 TTL=1 ID=32468 PROTO=2
May 8 11:56:19 mercurio kernel: SFW2-INext-DROP-DEFLT IN=eth0 OUT= MAC=01:00:5e:00:00:01:00:13:49:7f:ca:75:08:00 SRC=172.28.21.2 DST=224.0.0.1 LEN=28 TOS=0x00 PREC=0x00 TTL=1 ID=32469 PROTO=2
May 8 11:56:49 mercurio kernel: SFW2-INext-DROP-DEFLT IN=eth0 OUT= MAC=01:00:5e:00:00:01:00:13:49:7f:ca:75:08:00 SRC=172.28.21.2 DST=224.0.0.1 LEN=28 TOS=0x00 PREC=0x00 TTL=1 ID=32471 PROTO=2
May 8 11:57:04 mercurio kernel: SFW2-INext-DROP-DEFLT IN=eth0 OUT= MAC=01:00:5e:00:00:01:00:13:49:7f:ca:75:08:00 SRC=172.28.21.2 DST=224.0.0.1 LEN=28 TOS=0x00 PREC=0x00 TTL=1 ID=32472 PROTO=2
May 8 11:57:19 mercurio kernel: SFW2-INext-DROP-DEFLT IN=eth0 OUT= MAC=01:00:5e:00:00:01:00:13:49:7f:ca:75:08:00 SRC=172.28.21.2 DST=224.0.0.1 LEN=28 TOS=0x00 PREC=0x00 TTL=1 ID=32473 PROTO=2
May 8 11:57:49 mercurio kernel: SFW2-INext-DROP-DEFLT IN=eth0 OUT= MAC=01:00:5e:00:00:01:00:13:49:7f:ca:75:08:00 SRC=172.28.21.2 DST=224.0.0.1 LEN=28 TOS=0x00 PREC=0x00 TTL=1 ID=32475 PROTO=2
May 8 11:58:04 mercurio kernel: SFW2-INext-DROP-DEFLT IN=eth0 OUT= MAC=01:00:5e:00:00:01:00:13:49:7f:ca:75:08:00 SRC=172.28.21.2 DST=224.0.0.1 LEN=28 TOS=0x00 PREC=0x00 TTL=1 ID=32476 PROTO=2
May 8 11:58:19 mercurio kernel: SFW2-INext-DROP-DEFLT IN=eth0 OUT= MAC=01:00:5e:00:00:01:00:13:49:7f:ca:75:08:00 SRC=172.28.21.2 DST=224.0.0.1 LEN=28 TOS=0x00 PREC=0x00 TTL=1 ID=32477 PROTO=2
May 8 11:58:49 mercurio kernel: SFW2-INext-DROP-DEFLT IN=eth0 OUT= MAC=01:00:5e:00:00:01:00:13:49:7f:ca:75:08:00 SRC=172.28.21.2 DST=224.0.0.1 LEN=28 TOS=0x00 PREC=0x00 TTL=1 ID=32479 PROTO=2
May 8 11:59:04 mercurio kernel: SFW2-INext-DROP-DEFLT IN=eth0 OUT= MAC=01:00:5e:00:00:01:00:13:49:7f:ca:75:08:00 SRC=172.28.21.2 DST=224.0.0.1 LEN=28 TOS=0x00 PREC=0x00 TTL=1 ID=32480 PROTO=2
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¿how can i disable the IGMP function that is generating this traffic?

Thanks in advance.

2

FranzPatot wrote:

> my /var/log/firewall log file is full of lines concerning IGMP packets:
>
> M A Y 8 1 1 : 5 6 : 0 4 M E R C U R I O K E R N E L : S F
> W 2 - I N E X T - D R O P - D E F L T I N = E T H 0 O U T = M A C
> = 0 1 : 0 0 : 5 E : 0 0 : 0 0 : 0 1 : 0 0 : 1 3 : 4 9 : 7 F : C A : 7 5
> : 0 8 : 0 0 S R C = 1 7 2 . 2 8 . 2 1 . 2 D S T = 2 2 4 . 0 . 0 . 1
> L E N = 2 8 T O S = 0 X 0 0 P R E C = 0 X 0 0 T T L = 1 I D = 3
> 2 4 6 8 P R O T O = 2

(…)

> ¿how can i disable the IGMP function that is generating this traffic?

Under openSUSE 10.3, in /etc/sysconfig/SuSEfirewall2 I’ve got the following
option:

FW_SERVICES_DROP_EXT=“0/0,igmp”

Which drops specified packets without logging them.

Not sure if this option remains the same in all openSUSE releases, thought.

Greetings,

–
Camaleón