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Set net.ipv4.conf.*.drop_gratuitous_arp=1

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raja-grewal 2024-12-19 10:35:08 +00:00 • committed by GitHub
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usr/lib/sysctl.d/990-security-misc.conf
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@ -482,7 +482,7 @@ net.ipv6.conf.*.accept_redirects=0
## https://patchwork.ozlabs.org/project/netdev/patch/1428652454-1224-3-git-send-email-johannes@sipsolutions.net/
## https://www.practicalnetworking.net/series/arp/gratuitous-arp/
##
#net.ipv4.conf.*.drop_gratuitous_arp=1
net.ipv4.conf.*.drop_gratuitous_arp=1
## Ignore ICMP echo requests.
## Prevents clock fingerprinting through ICMP timestamps and Smurf attacks.