30 lines
1.2 KiB
Bash
30 lines
1.2 KiB
Bash
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#!/bin/sh
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# Restrict the MealQuest published host port (10.60.1.14:8090) to Traefik
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# (10.60.1.33) and the Docker host itself (10.60.1.14); drop every other
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# source.
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#
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# DOCKER-USER runs after Docker's DNAT, so the destination there is the
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# container address and port, not the published ones. Match the original
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# destination address and port with conntrack instead of -d/--dport.
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#
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# The rules must sit at the top of DOCKER-USER, ahead of any other project's
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# rules (an earlier RETURN or DROP would decide MealQuest traffic first).
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# Every run deletes all rules tagged with the mealquest-firewall comment and
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# re-inserts them at positions 1-3, so re-runs leave the same ordered rules
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# and no duplicates. Installed as /usr/local/sbin/mealquest-firewall.
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set -eu
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tag="-m comment --comment mealquest-firewall"
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match="-m conntrack --ctorigdst 10.60.1.14 --ctorigdstport 8090 --ctdir ORIGINAL"
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rules=$(iptables -w -S DOCKER-USER)
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printf '%s\n' "$rules" | while read -r _ chain spec; do
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case " $spec " in
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*" --comment mealquest-firewall "*) iptables -w -D "$chain" $spec ;;
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esac
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done
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iptables -w -I DOCKER-USER 1 -s 10.60.1.33/32 $match $tag -j RETURN
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iptables -w -I DOCKER-USER 2 -s 10.60.1.14/32 $match $tag -j RETURN
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iptables -w -I DOCKER-USER 3 $match $tag -j DROP
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