Δευτέρα 17 Αυγούστου 2015
Δευτέρα 16 Φεβρουαρίου 2015
Secure Shell (SSH)
rekkit@localhost:~> ssh-keygen -t rsa
cat /home/rekkit/.ssh/identity_file_10.248.49.150_fmcadm.pub
| ssh fmcadm@10.248.49.150 'cat
>> /home/fmcadm/.ssh/authorized_keys'
Put the public key in .ssh/authorized_keys2
Change the permissions of .ssh to 700
Change the permissions of .ssh/authorized_keys2 to 640
Πέμπτη 29 Ιανουαρίου 2015
Python with PlantUML
import subprocess
import urllib.request
import webbrowser
from threading import Timer
class Watchdog:
def __init__(self, timeout, userHandler=None): # timeout in seconds
self.timeout = timeout
self.handler = userHandler if userHandler is not None else self.defaultHandler
self.timer = Timer(self.timeout, self.handler)
def reset(self):
self.timer.cancel()
self.timer = Timer(self.timeout, self.handler)
def stop(self):
self.timer.cancel()
def defaultHandler(self):
raise self
def test_vpn():
fo = open("test_vpn.html", "w")
fo.write("<html>")
fo.write("\n")
fo.write("<head>Test script for vpn connection based on IKEv2</head>")
fo.write("\n")
fo.write("<body>")
fo.write("\n")
fo.write("<p>Initiator-[#brown]>Responder: VID+phase1 policies</p>")
test_steps(1)
fo.write("\n")
fo.write("<img src=\"IKEv2_flow.png\" alt=\"Oups, something went wrong with IKEv2_flow\">")
fo.write("\n")
fo.write("</body>")
fo.write("\n")
fo.write("</html>")
fo.close()
filename = webbrowser.open_new_tab('test_vpn.html')
webbrowser.open_new_tab(filename)
def test_steps(step):
if (step==1):
fo2 = open("IKEv2_flow.txt", "w")
fo2.write("@startuml")
fo2.write("\n")
fo2.write("title VPN connection based on IKEv2")
fo2.write("\n")
fo2.write("autonumber")
fo2.write("\n")
fo2.write("participant Initiator as Initiator")
fo2.write("\n")
fo2.write("participant Responder as Responder")
fo2.write("\n")
fo2.write("Initiator-[#brown]>Responder: VID+phase1 policies")
fo2.write("\n")
fo2.write("@enduml")
fo2.close()
watchdog = Watchdog(10)
try:
proc1 = subprocess.Popen(['java', '-jar', 'plantuml.jar'])
except Watchdog:
proc1.kill()
watchdog.stop()
#main
test_vpn()
Usage if you regularly execute something and want to make sure it is executed at least every y seconds:
def myHandler():
print "Whoa! Watchdog expired. Holy heavens!"
sys.exit()
watchdog = Watchdog(y, myHandler)
def doSomethingRegularly():
# make sure you do not return in here or call watchdog.reset() before returning
watchdog.reset()
--------------------------------------------------------------------------------------------------------------------------
@startuml
title VPN connection based on IKEv2
autonumber
participant Initiator as Initiator
participant Responder as Responder
Initiator-[#brown]>Responder: VID+phase1 policies
@enduml
--------------------------------------------------------------------------------------------------------------------------
<html>
<head>Test script for vpn connection based on IKEv2</head>
<body>
<p>Initiator-[#brown]>Responder: VID+phase1 policies</p>
<img src="IKEv2_flow.png" alt="Oups, something went wrong with IKEv2_flow">
</body>
</html>
--------------------------------------------------------------------------------------------------------------------------
Τρίτη 22 Ιουλίου 2014
BBC Archives - Click On - Episode 1
Rajesh Mirchandani presents a series covering the latest developments and issues in the world of IT. He investigates internet security, asking if companies are doing enough to protect their online customers. And is it possible to be technologically knowledgeable and environmentally friendly at the same time?
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