57 lines
1.4 KiB
Bash
Executable File
57 lines
1.4 KiB
Bash
Executable File
#!/bin/bash
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TOKEN="8101319618:AAHboFVVgmLPccJB0MDr_R2g0K90hkGqkRw"
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CHAT_ID="581059353"
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PIS=("192.168.178.2" "192.168.178.3" "192.168.178.5" "localhost")
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STATE_FILE="/home/kai/.ssh-monitor-lastcheck"
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if [ ! -f "$STATE_FILE" ]; then
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date --iso-8601=seconds > "$STATE_FILE"
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fi
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LAST_CHECK=$(cat "$STATE_FILE")
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NOW=$(date --iso-8601=seconds)
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for PI in "${PIS[@]}"
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do
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if [ "$PI" == "localhost" ]; then
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LOG=$(journalctl -u ssh --since "$LAST_CHECK" --no-pager)
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HOST=$(hostname)
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else
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LOG=$(ssh -o ConnectTimeout=5 \
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-o StrictHostKeyChecking=accept-new \
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-o UserKnownHostsFile=/home/kai/.ssh/known_hosts \
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kai@$PI \
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"journalctl -u ssh --since \"$LAST_CHECK\" --no-pager")
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HOST=$(ssh -o ConnectTimeout=5 \
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-o StrictHostKeyChecking=accept-new \
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-o UserKnownHostsFile=/home/kai/.ssh/known_hosts \
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kai@$PI hostname)
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fi
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FAILS=$(echo "$LOG" | grep "Failed password" | wc -l)
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if [ "$FAILS" -gt 0 ]; then
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IPS=$(echo "$LOG" | grep "Failed password" \
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| awk '{print $(NF-3)}' \
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| sort | uniq -c | sort -nr)
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MESSAGE="🚨 SSH Angriff erkannt!
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Host: $HOST ($PI)
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Fehlversuche: $FAILS
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Top Angreifer:
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$IPS"
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curl -s -X POST "https://api.telegram.org/bot$TOKEN/sendMessage" \
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-d chat_id="$CHAT_ID" \
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-d text="$MESSAGE"
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fi
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done
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echo "$NOW" > "$STATE_FILE"
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