How to Test and Disable NetBIOS on Windows Servers

Log into your dedicated server using Remote Desktop. 
Click on Start > Run > cmd.
Enter:
nbtstat -n
If you get any response other than
"Failed to access NetBT driver -- NetBT may not be loaded"
this means NetBIOS is enabled.
Run this script on the server to disable it completely:


net stop "TCP/IP NetBIOS Helper"
net stop netbt
 
sc config netbt start= disabled
sc config lmhosts start= disabled

OSI model vs TCP/IP model

The physical Layer is omitted in te TCP/IP model. This is because TCP/IP views
the Network Interface Layer as the point where the connection between the 
TCP/IP protocol and the networking hardware occurs.

 OSI model            TCP/IP
  7 Application              

  6 Presentation             Application

  5 Session

  4 Transport                Transport

  3 Network                  Internet

  2 Data Link
                             Network Interface
  1 Physical

Red Hat Andrew Foot, GM Compute - Hybrid IT, South Pacific

What it is a parked domain

example:  click.com.au is a parked domain

The owner of this domain has yet to point it to a website or online content. This means that the domain is parked.

Some domains are only parked for a short time while a new website is built or details updated. However, some can 
stay parked for extended periods; maybe as part of a domain name portfolio or perhaps to protect the name from 
being registered by somebody else.

If you would like to learn more about domain name registration, please visit Netregistry for a variety of free
 resources from Australia's most trusted domain name provider.

the Internet protocols as defined by various # RFCs.

# Copyright (c) 1993-2006 Microsoft Corp.
#
# This file contains the Internet protocols as defined by various
# RFCs.  See http://www.iana.org/assignments/protocol-numbers 
#
# Format:
#
#     [aliases...]   [#]

ip         0     IP           # Internet protocol
icmp       1     ICMP         # Internet control message protocol
ggp        3     GGP          # Gateway-gateway protocol
tcp        6     TCP          # Transmission control protocol
egp        8     EGP          # Exterior gateway protocol
pup        12    PUP          # PARC universal packet protocol
udp        17    UDP          # User datagram protocol
hmp        20    HMP          # Host monitoring protocol
xns-idp    22    XNS-IDP      # Xerox NS IDP
rdp        27    RDP          # "reliable datagram" protocol
ipv6       41    IPv6         # Internet protocol IPv6
ipv6-route 43    IPv6-Route   # Routing header for IPv6
ipv6-frag  44    IPv6-Frag    # Fragment header for IPv6
esp        50    ESP          # Encapsulating security payload
ah         51    AH           # Authentication header
ipv6-icmp  58    IPv6-ICMP    # ICMP for IPv6
ipv6-nonxt 59    IPv6-NoNxt   # No next header for IPv6
ipv6-opts  60    IPv6-Opts    # Destination options for IPv6
rvd        66    RVD          # MIT remote virtual disk

Who is on my network and how to see his/her files

For any one to see by DOS command prompt or CMD your Network

1. See who is on my network   

C:\ net use
New connections will be remembered.


Status       Local     Remote                    Network

-------------------------------------------------------------------------------
OK                     \\user_network\Directory      Microsoft Windows Network
The command completed successfully.

That user is on your network.  Now how we going to access this directory CD  does not work?


C:\pushd  \\user_network\Directory 

done you could see something like this

Z:\>dir
 Volume in drive Z has no label.
 Volume Serial Number is A888-39996

 Directory of Z:\

11/03/2019  09:47 AM              Directirty
25/06/2018  09:55 AM             2,127 user_file - Shortcut.lnk

Cheap SSL Certificates $39

How to become a Linux system administrator Part I

What is a system admin?

A system administrator is the person who is responsible  
for the smooth operation of one or more machines.
Each machine usually runs a number of UNIX services, 
some of them being more critical than others, and may 
have a number of users or developers utilising it.

Being able to productively administer a Linux machine 
on your own will take you two years of full-time 
administration experience. The single most critical 
task of an administrator is defining and implementing 
good backup practices and it's something 
you need to learn quickly.

It is also usual and extremely critical for 
the system administrator to have the intranet or
 web services of the company up and running at all 
times. Websites are usually considered a reflection 
of the reliability of the company it represents, 
so it's a responsibility that's naturally 
high priority

The importance of Wireshark and tshark

The best way to analyse data is using Wireshark or its command line version, tshark. 
The main advantage of the command line version is that it can be included in a script.

Nowadays there are many things going on inside a computer network, mobile network and other devices that 
connects in one or the other ways to a WiFi network. Before you start capturing, it is better to have 
a given issue in mind that you want to solve or examine.


Wireshark allows you to filter the network data during capture time by capturing  specific types of 
traffic, avoiding the creation of huge capture files but there are also display filters. Display 
filters tell Wireshark to display the network packets that  really matter so that you look at 
fewer packets and easily unveil what you are trying to find.



Download 
Whireshark official site

https://www.wireshark.org/download.html