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#!/bin/bash
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#!/bin/bash
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# $Id: alcasar.sh 1769 2016-01-17 20:39:23Z richard $
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# $Id: alcasar.sh 1778 2016-01-19 22:40:43Z richard $
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# alcasar.sh
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# alcasar.sh
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# ALCASAR Install script - CopyLeft ALCASAR Team [Rexy + 3abtux + Steweb + Crox + ...]
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# ALCASAR Install script - CopyLeft ALCASAR Team [Rexy + 3abtux + Steweb + Crox + ...]
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# Ce programme est un logiciel libre ; This software is free and open source
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# Ce programme est un logiciel libre ; This software is free and open source
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echo "net.ipv4.conf.all.accept_source_route = 0" >> /etc/sysctl.d/alcasar.conf
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echo "net.ipv4.conf.all.accept_source_route = 0" >> /etc/sysctl.d/alcasar.conf
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# set conntrack timer to 1h (3600s) instead of 5 weeks
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# set conntrack timer to 1h (3600s) instead of 5 weeks
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echo "net.netfilter.nf_conntrack_tcp_timeout_established = 3600" >> /etc/sysctl.d/alcasar.conf
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echo "net.netfilter.nf_conntrack_tcp_timeout_established = 3600" >> /etc/sysctl.d/alcasar.conf
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# disable log_martians (ALCASAR is often installed between two private network addresses)
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# disable log_martians (ALCASAR is often installed between two private network addresses)
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echo "net.ipv4.conf.all.log_martians = 0" >> /etc/sysctl.d/alcasar.conf
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echo "net.ipv4.conf.all.log_martians = 0" >> /etc/sysctl.d/alcasar.conf
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# disable iptables_helpers
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echo "net.netfilter.nf_conntrack_helper = 0" >> /etc/sysctl.d/alcasar.conf
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# remove Magic SysReq Keys
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# remove Magic SysReq Keys
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[ -e /etc/sysctl.d/51-alt-sysrq.conf ] && rm /etc/sysctl.d/51-alt-sysrq.conf
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[ -e /etc/sysctl.d/51-alt-sysrq.conf ] && rm /etc/sysctl.d/51-alt-sysrq.conf
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# switch to multi-users runlevel (instead of x11)
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# switch to multi-users runlevel (instead of x11)
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ln -sf /lib/systemd/system/multi-user.target /etc/systemd/system/default.target
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ln -sf /lib/systemd/system/multi-user.target /etc/systemd/system/default.target
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# GRUB modifications (only one time)
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# GRUB modifications (only one time)
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