25 lines
1.3 KiB
Plaintext
Executable File
25 lines
1.3 KiB
Plaintext
Executable File
#!/bin/sh
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test "$EUID" -eq 0 || exec sudo "$0" "$@"
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set -e
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# https://askubuntu.com/a/124512 and https://blog.sleeplessbeastie.eu/2018/06/21/how-to-create-iptables-firewall-using-custom-chains/
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iptables --new-chain chain-times 2>/dev/null || iptables --flush chain-times
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# Always allow local connections - https://serverfault.com/a/550278
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iptables -A chain-times -m owner --uid-owner janek -d 192.168.1.0/24 -j ACCEPT
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iptables -A chain-times -m owner --uid-owner janek -d 127.0.0.0/8 -j ACCEPT
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time9=$(date -u -d "$(date -d 09:00)" +%k)
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iptables -A chain-times -m owner --uid-owner janek -j DROP -m time \
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--timestart $(date -u -d "$(date -d "${1:-15 min}")" +%k:%M) --timestop $(expr $time9 - 2):00
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# Only allow periodical internet access in the morning
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#iptables -A chain-times -m owner --uid-owner janek -j DROP -m time --weekdays 1-5 \
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# --timestart $time9:20 --timestop $(expr $time9 + 1):00
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#iptables -A chain-times -m owner --uid-owner janek -j DROP -m time --weekdays 1-5 \
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# --timestart $(expr $time9 + 1):20 --timestop $(expr $time9 + 2):00
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iptables -L OUTPUT | grep -q "^chain-times" || iptables -A OUTPUT -j chain-times
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if test "$2" = "--save"; then
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iptables-save | tee /etc/iptables/walli.rules
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echo "@reboot root $(which iptables-restore) < /etc/iptables/walli.rules" | tee /etc/cron.d/iptables-times
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fi
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