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Set net.ipv4.conf.*.arp_ignore=2

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raja-grewal 2024-12-19 10:33:49 +00:00 committed by GitHub
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2 changed files with 3 additions and 3 deletions
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4
README.md
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@ -108,8 +108,8 @@ Networking:
- Optional - Enable ARP filtering to mitigate some ARP spoofing and ARP
cache poisoning attacks.
- Optional - Respond to ARP requests only if the target IP address is
on-link, preventing some IP spoofing attacks.
- Respond to ARP requests only if the target IP address is on-link,
preventing some IP spoofing attacks.
- Optional - Drop gratuitous ARP packets to prevent ARP cache poisoning
via man-in-the-middle and denial-of-service attacks.

2
usr/lib/sysctl.d/990-security-misc.conf
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@ -470,7 +470,7 @@ net.ipv6.conf.*.accept_redirects=0
## https://github.com/mullvad/mullvadvpn-app/pull/7141
## https://www.x41-dsec.de/static/reports/X41-Mullvad-Audit-Public-Report-2024-12-10.pdf
##
#net.ipv4.conf.*.arp_ignore=2
net.ipv4.conf.*.arp_ignore=2
## Drop gratuitous ARP (Address Resolution Protocol) packets.
## Stops ARP responses sent by a device without being explicitly requested.