Portscanner nur mit Linuxboardmitteln: Unterschied zwischen den Versionen
Zur Navigation springen
Zur Suche springen
| Zeile 20: | Zeile 20: | ||
scan_port() { | scan_port() { | ||
PORT="$1" | PORT="$1" | ||
| − | (echo >/dev/tcp/$HOST/$PORT) >/dev/null 2>&1 | + | if (echo >/dev/tcp/$HOST/$PORT) >/dev/null 2>&1 |
| − | + | then | |
echo "Host: $HOST - Port: $PORT open" | echo "Host: $HOST - Port: $PORT open" | ||
fi | fi | ||
} | } | ||
| − | |||
export -f scan_port | export -f scan_port | ||
export HOST | export HOST | ||
| − | |||
seq $START $STOP | xargs -P $THREADS -I{} bash -c 'scan_port "$@"' _ {} | seq $START $STOP | xargs -P $THREADS -I{} bash -c 'scan_port "$@"' _ {} | ||
| − | |||
</syntaxhighlight> | </syntaxhighlight> | ||
Version vom 27. November 2025, 08:02 Uhr
Einfache sequentielle Methode
#!/bin/bash
HOST="$1"
for PORT in $(seq 1 1024); do
if (echo >/dev/tcp/$HOST/$PORT) 2>/dev/null
then
echo "OPEN: $PORT"
fi
done
Multithread Methode
#!/bin/bash
HOST="$1"
START="$2"
STOP="$3"
THREADS=50 # Anzahl paralleler Jobs
scan_port() {
PORT="$1"
if (echo >/dev/tcp/$HOST/$PORT) >/dev/null 2>&1
then
echo "Host: $HOST - Port: $PORT open"
fi
}
export -f scan_port
export HOST
seq $START $STOP | xargs -P $THREADS -I{} bash -c 'scan_port "$@"' _ {}