Script Bash Procurando proxy aberto com NMAP

#!/bin/sh
#Fonte : http://funoverip.net/2010/11/socks-proxy-servers-scanning-with-nmap/
# store
socks_found="socks.ok"

# ports to scan
ports="1080"

nmap    -sS                             \
        --min-parallelism  700 \
        -n                              \
        -PN                             \
        -p $ports                       \
        --max-retries 1                 \
        --script socks-open-proxy       \
        -T 4                            \
        -iL ranges.txt                  \
        2>/dev/null \
        | grep -B 4 -A 2 "socks-open-proxy:"  \
        | tee -a $socks_found