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1

You have the path name wrong. It is /proc/sys/net/ipv6/icmp/echo_ignore_all not /proc/sys/net/ipv6/icmp_echo_ignore_all Note that after the icmp there is a /, not a _.


1

sysctl net.ipv6.icmp.echo_ignore_all=1 Working on linux kernel 4.19.


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