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TCPDump Top Countries Useful for Conduit
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| #!/usr/bin/env bash | |
| set -euo pipefail | |
| CAPTURE_SECONDS="${CAPTURE_SECONDS:-15}" | |
| TOP_N="${TOP_N:-25}" | |
| echo "=== Conduit Country Tracker (Top Countries) ===" | |
| echo "" | |
| echo "[1/4] Installing required tools..." | |
| sudo apt-get update -y | |
| sudo apt-get install -y tcpdump geoip-bin gawk coreutils grep sed | |
| echo "" | |
| echo "[2/4] Detecting primary network interface..." | |
| IFACE="$(ip route get 1.1.1.1 2>/dev/null | awk '{for(i=1;i<=NF;i++) if($i=="dev") {print $(i+1); exit}}' || true)" | |
| if [[ -z "${IFACE}" ]]; then | |
| IFACE="$(ip route | awk '/^default /{print $5; exit}' || true)" | |
| fi | |
| if [[ -z "${IFACE}" ]]; then | |
| echo "ERROR: Could not detect network interface." | |
| echo "Run: ip route get 1.1.1.1" | |
| exit 1 | |
| fi | |
| echo "Detected interface: ${IFACE}" | |
| echo "" | |
| echo "[3/4] Capturing inbound traffic for ${CAPTURE_SECONDS}s on ${IFACE}..." | |
| # Capture inbound packets and extract public source IPs | |
| IPS="$( | |
| sudo timeout "${CAPTURE_SECONDS}" tcpdump -ni "${IFACE}" 'inbound and (tcp or udp)' 2>/dev/null \ | |
| | awk '{print $3}' \ | |
| | cut -d. -f1-4 \ | |
| | grep -E '^[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+$' \ | |
| | grep -vE '^(10\.|127\.|172\.(1[6-9]|2[0-9]|3[0-1])\.|192\.168\.)' \ | |
| | sort -u || true | |
| )" | |
| if [[ -z "${IPS}" ]]; then | |
| echo "No public inbound IPs captured in ${CAPTURE_SECONDS}s." | |
| echo "" | |
| echo "Common reasons:" | |
| echo " - Conduit has 0 clients right now (nothing inbound)." | |
| echo " - The VPS is very quiet during the capture window." | |
| echo "" | |
| echo "Try:" | |
| echo " - Increase CAPTURE_SECONDS=300" | |
| echo " - Check: docker logs conduit --tail 30" | |
| exit 0 | |
| fi | |
| echo "Captured $(echo "${IPS}" | wc -l | tr -d ' ') unique public source IP(s)." | |
| echo "" | |
| echo "[4/4] Top Countries (ranked):" | |
| echo "---------------------------------------------" | |
| echo "${IPS}" \ | |
| | xargs -n1 geoiplookup \ | |
| | awk -F: '{print $2}' \ | |
| | sed 's/^ *//' \ | |
| | awk 'NF' \ | |
| | sort \ | |
| | uniq -c \ | |
| | sort -nr \ | |
| | head -n "${TOP_N}" | |
| echo "---------------------------------------------" | |
| echo "Done." |
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