My humble results. Testing ping to loopback using v4 and v6

Hello there,
  Regarding RTT v4 vs v6 I did something "interesting" recently, would like to know your thoughs.
  If you ping6 your loopback (let´s say 1000 packets) interface with Windows or Linux, v6 is faster.
  Now try the same on MAC (El capitan for example).., v6 is 20-25% slower.
  I did the above with many devices (and asked some friends) and the behavior was pretty much the same.


MAC:
--- 127.0.0.1 ping statistics ---
100 packets transmitted, 100 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 0.037/0.098/1.062/0.112 ms
--- ::1 ping6 statistics ---
100 packets transmitted, 100 packets received, 0.0% packet loss
round-trip min/avg/max/std-dev = 0.058/0.120/0.194/0.027 ms



Linux:
--- 127.0.0.1 ping statistics ---
100 packets transmitted, 100 received, 0% packet loss, time 98999ms
rtt min/avg/max/mdev = 0.015/0.021/0.049/0.007 ms

--- ::1 ping statistics ---
100 packets transmitted, 100 received, 0% packet loss, time 99013ms
rtt min/avg/max/mdev = 0.019/0.031/0.040/0.004 ms


Windows 10:

Ping statistics for ::1:
    Packets: Sent = 100, Received = 100, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 0ms, Maximum = 0ms, Average = 0ms


Ping statistics for 127.0.0.1:
    Packets: Sent = 100, Received = 100, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 0ms, Maximum = 4ms, Average = 0ms


Bye,


wetheitteam.com
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Python Script: Probably useless but functional IPv6 Network scanner

Below is the code of what is probably useless but a functional IPv6 host scanner written in Python using threading.

To perform a regular (brute force) network scans in an IPv6 Network is almost impossible it can take over 5.000 years to finish.

This project was purely academic and I just wanted to learn about threading in Python.

This software is not recommended for general usage.....

This  script  will call the OS to actually perform the ping

This software receives two parameters:
a) Prefix to scan in the format 2001:db8::/64 (subnet, not host)
b) Number of simultaneous processes it can run (MAXPINGS)

One more time it was purely academic stuff but hopefully it can make your day

Finally, AFAIK nmap does not yet support IPv6 network scan.

The code written in python3:

--- cut here ---

#!/usr/bin/python3

import threading
import sys
import ipaddress
import subprocess
import time

CURRENTPINGS=0 # Number of simultaneous ping at a time

def DOPING6(IPv6ADDRESS):
  global MAXPINGS, CURRENTPINGS
  CURRENTPINGS+=1
  CMD="ping6 -c 3 "+str(IPv6ADDRESS) + " 2> /dev/null > /dev/null"
  return_code = subprocess.call(CMD, shell=True)
  if return_code == 0:  #If ping was succesful
    print (IPv6ADDRESS," is alive")
 
  CURRENTPINGS-=1
 
def main():
  global MAXPINGS, CURRENTPINGS
  if len(sys.argv) != 3: #Validate how many parameters we are receiving
    print("  Not enough or too many parameter")
    print("  Usage: ./scanipv6.py IPv6Prefix/lenght MAXPINGS")
    print("  Example: ./scanipv6.py 2001:db8::/64 20")
    print("  Prefix lenght can be between 64-128")
    print("  MAXPINGS corresponds to how many pings will be running at the same time")
    exit()

  SUBNET,MASK=sys.argv[1].split("/")
  MAXPINGS=int(sys.argv[2])

  for addr in ipaddress.IPv6Network(sys.argv[1]):  #Let's loop for each address in the Block
    ping_thread=threading.Thread(target=DOPING6,args=(addr,))

    while CURRENTPINGS >= MAXPINGS: # With this while we make it possible to run max simultaneous pings
      time.sleep(1)  # Let's wait one second before proceeding
      #print ("Interrumping...., CURRENTPINGS > MAXPINGS") #Uncomment this line just for debugging

    ping_thread.start()

main()