That might explain '/proc/sys/net/ipv4/icmp_echo_ignore_broadcasts', most modern Cisco routers now have 'no ip directed-broadcast' enabled by default, at least

That might explain '/proc/sys/net/ipv4/icmp_echo_ignore_broadcasts', most modern Cisco routers now have 'no ip directed-broadcast' enabled by default, at least for the past 4-5 years, blocking this at the router level.