#! /bin/bash
int_ip=$(ifconfig | grep -E -o "(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)" | sed '3,3!d')
echo "Internal IP is:"$int_ip
subnet=$(ifconfig | grep -E -o "(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)" | sed '4,4!d')
echo "Internal Subnet is:"$subnet
ext_ip=$(curl -s http://whatismyip.org | grep -E -o "(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)")
echo "External IP is:"$ext_ip
subnet_cut=$(ifconfig | grep -E -o "(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)" | sed '4,4!d' | cut -d '.' -f 1-3)
echo "Alive hosts on the network: "
(prefix=$subnet_cut && for i in `seq 254`; do (sleep 0.5 && ping -c1 -w1 $prefix.$i &> /dev/null && arp -n | awk ' /'$prefix'.'$i' / { print $1 " " $3 } ') & done; wait)
echo "Arp scan: "
arp-scan --localnet
nmap -O $subnet_cut.0/24 -vv --open | grep -v 'Nmap' | grep -v 'SYN' | grep -v 'OS detection' | grep -v 'Increasing' | grep -v 'OS:'
mac_vendors=$(nmap -sP -n $subnet_cut.0/24)
echo -e "'List of Vendors:' $mac_vendors"