scan net for specified ports

# scan network for open ports, list IPs that have something listening on those ports
# You can list multiple ports, separate them by commas (22,80,443).


function check_port() { NETWORK="$1"; shift; PORTS="$1"; shift; [ -z "$PORTS" ] && echo "Use: check_port CIDR PORTS - scans CIDR, prints ip if it listens on comma separated PORTS." && return 1;  nmap --open -p "${PORTS}" "${NETWORK}" -oG - | awk '/\/open/ {print $2 }'; }


function check_port() { 
  NETWORK="$1"; shift; 
  PORTS="$1"; shift; 
  
  [ -z "$PORTS" ] && \
    echo "Use: check_port CIDR PORTS - scans CIDR, prints ip if it listens on comma separated PORTS." && \
    return 1;  
    
    nmap --open -p "${PORTS}" "${NETWORK}" -oG - | awk '/\/open/ {print $2 }'; 
    
}