security-misc/etc/sysctl.d/tcp_hardening.conf
Patrick Schleizer 75f36bc2c9
comments
2019-10-07 08:25:07 +00:00

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## Copyright (C) 2019 - 2019 ENCRYPTED SUPPORT LP <adrelanos@riseup.net>
## See the file COPYING for copying conditions.
#### meta start
#### project Whonix and Kicksecure
#### category networking and security
#### description
## TCP/IP stack hardening
## Protects against time-wait assassination.
## It drops RST packets for sockets in the time-wait state.
net.ipv4.tcp_rfc1337=1
## Disables ICMP redirect acceptance.
net.ipv4.conf.all.accept_redirects=0
net.ipv4.conf.default.accept_redirects=0
net.ipv4.conf.all.secure_redirects=0
net.ipv4.conf.default.secure_redirects=0
net.ipv6.conf.all.accept_redirects=0
net.ipv6.conf.default.accept_redirects=0
## Disables ICMP redirect sending.
net.ipv4.conf.all.send_redirects=0
net.ipv4.conf.default.send_redirects=0
## Ignores ICMP requests.
net.ipv4.icmp_echo_ignore_all=1
## Enables TCP syncookies.
net.ipv4.tcp_syncookies=1
## Disable source routing.
net.ipv4.conf.all.accept_source_route=0
net.ipv4.conf.default.accept_source_route=0
#### meta end