Python script to give you subsets of the nmap "top-ports". For example, I want the 10th to 100th most common TCP ports. Why would you want to skip the first 10 ports in this example? Because you already scanned them :)
Useful on external network assessments when you have a lot of scanning to do.
It spits out a comma separated list you can copy into -p arg for nmap or masscan
Can also do UDP, but not UDP and TCP at the same time.
Order based on the /usr/share/nmap/nmap-services file, just like nmap's baked in top-ports functionality
Example:
root@kaliboxen:/root/dev/portSlicer# ./topPortSlicer.py -range 10-20 -tcp
Top 10 to 20 TCP services:
139,143,53,135,3306,8080,1723,111,995,993,5900
The optional '-setEnvVar' parameter takes an environmental variable name. When this option is used, a new bash instance is created with the ports set to the provided environmental variable name. You can then use: nmap -p $ENVVARIABLENAME
This allows you to avoid the copy pasta. Note that this is a new bash instance, so after you run nmap, you probably want to call exit to get back to your original bash context.
For example:
root@kaliboxen:/root/dev/Top-Port-Slicer# ./topPortSlicer.py -range 5-10 -udp -setEnvVar PORTS2SCAN
Top 5 to 10 UDP services:
138,1434,445,135,67,53
Ports exported to environmental variable: PORTS2SCAN
Use with nmap, etc, like: nmap -p $PORTS2SCAN
root@kaliboxen:/root/dev/Top-Port-Slicer# nmap -sUV -p $PORTS2SCAN localhost
Starting Nmap 7.70SVN ( https://nmap.org ) at 2019-03-08 14:44 EST
Nmap scan report for localhost (127.0.0.1)
Host is up (0.000031s latency).
Other addresses for localhost (not scanned): ::1
PORT STATE SERVICE VERSION
53/udp closed domain
67/udp closed dhcps
135/udp closed msrpc
138/udp closed netbios-dgm
445/udp closed microsoft-ds
1434/udp closed ms-sql-m
Service detection performed. Please report any incorrect results at https://nmap.org/submit/ .
Nmap done: 1 IP address (1 host up) scanned in 0.64 seconds
root@kaliboxen:/root/dev/Top-Port-Slicer# exit
exit
root@kaliboxen:/root/dev/Top-Port-Slicer#
Updated for python3