enzo@scuderia-pc:~$ uname -a
Linux scuderia-pc 4.15.0-44-generic #47-Ubuntu SMP Mon Jan 14 11:26:59 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
enzo@scuderia-pc:~$ grep -H .  /proc/sys/net/ipv4/conf/*/rp_filter
/proc/sys/net/ipv4/conf/all/rp_filter:1
/proc/sys/net/ipv4/conf/default/rp_filter:1
/proc/sys/net/ipv4/conf/enp5s0/rp_filter:2
/proc/sys/net/ipv4/conf/lo/rp_filter:0
/proc/sys/net/ipv4/conf/tun0/rp_filter:1
/proc/sys/net/ipv4/conf/vcan0/rp_filter:1
/proc/sys/net/ipv4/conf/vcan1/rp_filter:1
/proc/sys/net/ipv4/conf/wlp3s0/rp_filter:1
enzo@scuderia-pc:~$ grep -H . /proc/sys/net/ipv4/conf/*/force_igmp_version
/proc/sys/net/ipv4/conf/all/force_igmp_version:0
/proc/sys/net/ipv4/conf/default/force_igmp_version:0
/proc/sys/net/ipv4/conf/enp5s0/force_igmp_version:0
/proc/sys/net/ipv4/conf/lo/force_igmp_version:0
/proc/sys/net/ipv4/conf/tun0/force_igmp_version:0
/proc/sys/net/ipv4/conf/vcan0/force_igmp_version:0
/proc/sys/net/ipv4/conf/vcan1/force_igmp_version:0
/proc/sys/net/ipv4/conf/wlp3s0/force_igmp_version:0
enzo@scuderia-pc:~$ cat /proc/sys/net/ipv4/icmp_echo_ignore_broadcasts
1
enzo@scuderia-pc:~$ cat /proc/net/igmp
Idx	Device    : Count Querier	Group    Users Timer	Reporter
1	lo        :     1      V3
				010000E0     1 0:00000000		0
2	enp5s0    :     2      V2
				FB0000E0     1 0:00000000		0
				010000E0     1 0:00000000		0
3	wlp3s0    :     1      V3
				010000E0     1 0:00000000		0
11	tun0      :     2      V3
				FB0000E0     2 0:00000000		0
				010000E0     1 0:00000000		0
12	vcan0     :     1      V3
				010000E0     1 0:00000000		0
13	vcan1     :     1      V3
				010000E0     1 0:00000000		0
enzo@scuderia-pc:~$ cat /proc/net/dev_mcast
2    enp5s0          1     0     01005e000001
2    enp5s0          1     0     01005e0000fb
3    wlp3s0          2     0     01005e000001