Your Name
46 lines
849 B
Bash
Executable File
46 lines
849 B
Bash
Executable File
#!/usr/bin/env bash
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set -euo pipefail
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# POS: network checkport — Check TCP port connectivity
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usage() {
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cat <<EOF
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Usage: pos network checkport <ip:port>
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Check if a TCP port is open on a remote host.
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Examples:
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pos network checkport 192.168.1.1:80
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pos network checkport 10.0.0.5:443
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EOF
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exit 0
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}
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case "${1:-}" in
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-h|--help|"") usage ;;
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esac
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target="$1"
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if [[ "$target" != *:* ]]; then
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echo "ERROR: Expected <ip:port> format, got '$target'"
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echo "Usage: pos network checkport <ip:port>"
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exit 1
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fi
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ip="${target%:*}"
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port="${target#*:}"
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if [[ -z "$ip" || -z "$port" ]]; then
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echo "ERROR: Invalid target '$target'"
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exit 1
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fi
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echo "Checking $ip:$port ..."
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echo
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if timeout 2 bash -c "cat < /dev/null > /dev/tcp/$ip/$port" 2>/dev/null; then
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echo "OPEN ✔ $ip:$port"
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else
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echo "CLOSED ✖ $ip:$port"
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fi
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