AR2000/crowdsec-legacy-firewall-bouncer
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script feed from stdin via json

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Squashed commit of the following:

commit ad482533fa
Author: AR2000 <ar2000@ar2000.me>
Date:   Thu Jan 16 15:33:16 2025 +0100

    add jq to container

commit 79352ec046
Author: AR2000 <ar2000@ar2000.me>
Date:   Thu Jan 16 14:55:37 2025 +0100

    stdin

commit 3100810052
Author: AR2000 <ar2000@ar2000.me>
Date:   Thu Jan 16 14:33:05 2025 +0100

    test
This commit is contained in:
AR2000
2025-01-16 15:44:56 +01:00
parent 9fbd21f958
commit 09186aedac
3 changed files with 51 additions and 30 deletions
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9
Dockerfile
View File

@@ -1,20 +1,20 @@
ARG IPTABLES_MODE=nft
#install iptables
FROM ubuntu:noble AS iptables
FROM ubuntu:noble AS apt
RUN --mount=type=cache,target=/var/lib/apt/lists,sharing=locked --mount=type=cache,target=/var/cache/apt,sharing=locked <<EOF
apt update
apt upgrade -y
apt install iptables -y
apt install iptables jq -y
EOF
#set alternative to use iptables-legacy
FROM iptables AS iptables-legacy
FROM apt AS iptables-legacy
RUN update-alternatives --set iptables /usr/sbin/iptables-legacy
RUN update-alternatives --set ip6tables /usr/sbin/ip6tables-legacy
#set alternative to use iptables-nft
FROM iptables AS iptables-nft
FROM apt AS iptables-nft
RUN update-alternatives --set iptables /usr/sbin/iptables-nft
RUN update-alternatives --set ip6tables /usr/sbin/ip6tables-nft
@@ -33,6 +33,7 @@ COPY --from=build-stage /app/cs-custom-bouncer/crowdsec-custom-bouncer \
/usr/bin/crowdsec-custom-bouncer
COPY --from=build-stage /app/cs-custom-bouncer/config/crowdsec-custom-bouncer.yaml \
/crowdsec-custom-bouncer.yaml
RUN sed -i "s/total_retries: .*/total_retries: 1/g" /crowdsec-custom-bouncer.yaml
ADD --chmod=770 bouncer.sh /bouncer.sh
ENV BINARY_PATH=/bouncer.sh
LABEL me.ar2000.gitea.buildargs.iptablesmode="${IPTABLES_MODE}"

21
bouncer.sh
View File

@@ -2,16 +2,18 @@
#
# Script to add /remove IPs to iptables
[[ -n "${IPTABLES_COMMENT}" ]] && comment="-m comment --comment \"$4\"" || comment=""
: ${IPTABLES_CHAIN:=INPUT}
function iptableAdd() {
#check if the rule already exist
if ! iptables $comment -C $IPTABLES_CHAIN -s "$1" -j DROP; then
#do we insert at a $IPTABLES_INSERT position or append to the chain
if [[ -z "${IPTABLES_INSERT}" ]]; then
iptables $comment -A $IPTABLES_CHAIN -s "$1" -j DROP
else
iptables $comment -I $IPTABLES_CHAIN "$IPTABLES_INSERT" -s "$1" -j DROP
fi
fi
}
function iptableDel() {
@@ -19,17 +21,25 @@ function iptableDel () {
}
function ip6tableAdd() {
#check if the rule already exist
if ! ip6tables $comment -C $IPTABLES_CHAIN -s "$1" -j DROP; then
#do we insert at a $IPTABLES_INSERT position or append to the chain
if [[ -z "${IPTABLES_INSERT}" ]]; then
ip6tables $comment -A $IPTABLES_CHAIN -s "$1" -j DROP
else
ip6tables $comment -I $IPTABLES_CHAIN "$IPTABLES_INSERT" -s "$1" -j DROP
fi
fi
}
function ip6tableDel() {
ip6tables $comment -D $IPTABLES_CHAIN -s "$1" -j DROP
}
function processAction() {
[[ -n "${IPTABLES_COMMENT}" ]] && comment="-m comment --comment \"$4\"" || comment=""
#determine action
if [ "$1" = "add" ]; then #add
if [[ "$2" =~ .*[.].* ]]; then #ipv4
@@ -50,3 +60,10 @@ elif [ "$1" = "del" ]; then #del
else
echo "unknown action"
fi
}
while read line; do
echo processAction $(echo "$line" | jq -r .action) $(echo "$line" | jq -r .value) $(echo "$line" | jq -r .duration) $(echo "$line" | jq -r .scenario) | tee bouncer.sh.out
processAction $(echo "$line" | jq -r .action) $(echo "$line" | jq -r .value) $(echo "$line" | jq -r .duration) $(echo "$line" | jq -r .scenario)
done
#{"duration":"-1h1m9s","origin":"CAPI","scenario":"crowdsecurity/ssh-bf","scope":"Ip","type":"ban","value":"122.117.32.192","id":22739513,"action":"del"}

3
publish-dev.sh Executable file
View File

@@ -0,0 +1,3 @@
#!/bin/bash
docker image tag gitea.ar2000.me/ar2000/crowdsec-legacy-firewall-bouncer:legacy gitea.ar2000.me/ar2000/crowdsec-legacy-firewall-bouncer:dev
docker push gitea.ar2000.me/ar2000/crowdsec-legacy-firewall-bouncer:dev