Friday, September 11, 2015

Star Wars Episode IV on telnet

Open telnet or just use putty as telnet is not part of windows from vista.
towel.blinkenlights.nl

Thursday, September 10, 2015

Enable ssh on a cisco router

Login to the router via com or aux port.

Router>enable
Router#config t
Router(config)#hostname myRouter
myRouter(config)#username s86d password cisco

myRouter(config)#crypto  key generate rsa-general-keys modulus 1024
myRouter(config)#ip ssh version 2

myRouter(config)#line vty 0 4
 myRouter(config-line)#transport input ssh
 myRouter(config-line)#login local
myRouter(config-line)#exit
 myRouter(config)#copy running-config startup-config

Wednesday, September 9, 2015

Install windows 8, 8.1 and related windows server 2012, 2012 R2 without a product key

You have to edit/create the file disk:/sources/ei.cfg
 
[Channel]
Retail
[VL]
0
 
[Channel] can be set to OEM / Retail
[VL] means Volume Licensing for volume media for companies that use same key
[EditionID] to Core / Professional etc or leave black and it will ask during setup

To activate windows after install use the wizard or cmd : slui 3

To add the file to the windows iso file you can use PowerIso - note you need regiestered version. 

Tuesday, September 8, 2015

How to delete a service manually

You can see all services in the snap-in control Services : services.msc

To delete a service copy the service name from the snap-in control then type :

sc delete "service name"

Monday, September 7, 2015

Access network share or map network location from cmd

To get faster access to a network share or to access a network share that requires username and password type at cmd :

net use \\computername\ipc$ password /user:username

To map a network location type :

net use n: \\computername\sharename password /user:username

To delete a maping :

net use n: /delete

Saturday, August 22, 2015

How to see what process keeps a file / folder open

Download from Microsoft Sysinternals Process Explorer

Then select from the menu Find  - Find Handle or DLL... or CTRL+F   type the name of the file/folder.
Then you can either close the process or just select the file/folder handle and right click - Close Handle.


Tuesday, June 9, 2015

NETWORK IPV4 + IPV6

IPV6
Put address in brakets when in url []
For ipv6 only you need a NAT64 gateway - https://nat64.net/public-providers
NOTE
Google and Cloudflare offer only DNS but without gateway they are useless.

1234:1234:1234:1234::/64 ---> 1234:1234:1234:1234::1
https://[1234:1234:1234:1234::1]/
vs
https://123.123.123.123/

Netmasks group IP addresses.

There are the basic A,B,C class networks :

   1st address   Last address      Netmask per network

A:   0.0.0.0 ... 127.255.255.255   255.0.0.0
B: 128.0.0.0 ... 191.255.255.255   255.255.0.0
C: 192.0.0.0 ... 223.255.255.255   255.255.255.0
 
CIDR instead of limiting the network size to 245, 64k or 16M it uses any power of 2 for the network size. It sees the netmask as a 32 bit number instead of 4 bytes.

The CIDR (Classless Inter-Domain Routing) is the number of 1 from left to right in the netmask.

11111111 11111111 11111111 00000000 = 255.255.255.0 = /24 =   256 ips in the network  (2^8) 32-24=8 bits
11111111 11111111 11111100 00000000 = 255.255.252.0 = /22 = 1024 ips in the network (2^10)  32-22=10 bits

Netmask: 255.255.255.252 or /30
Starts with multiple of 4
0 - 3 | 4-7 | 8-11 | 12-15 | ..... | 252-255

Binary                             Hex        Quad Dec          2ⁿ    CIDR   Number of addresses

00000000000000000000000000000000   00000000   0.0.0.0           2³²   /0     4,294,967,296     4 G
10000000000000000000000000000000   80000000   128.0.0.0         2³¹   /1     2,147,483,648     2 G
11000000000000000000000000000000   C0000000   192.0.0.0         2³⁰   /2     1,073,741,824     1 G
11100000000000000000000000000000   E0000000   224.0.0.0         2²⁹   /3       536,870,912   512 M
11110000000000000000000000000000   F0000000   240.0.0.0         2²⁸   /4       268,435,456   256 M
11111000000000000000000000000000   F8000000   248.0.0.0         2²⁷   /5       134,217,728   128 M
11111100000000000000000000000000   FC000000   252.0.0.0         2²⁶   /6        67,108,864    64 M
11111110000000000000000000000000   FE000000   254.0.0.0         2²⁵   /7        33,554,432    32 M
11111111000000000000000000000000   FF000000   255.0.0.0         2²⁴   /8        16,777,216    16 M
11111111100000000000000000000000   FF800000   255.128.0.0       2²³   /9         8,388,608     8 M
11111111110000000000000000000000   FFC00000   255.192.0.0       2²²   /10        4,194,304     4 M
11111111111000000000000000000000   FFE00000   255.224.0.0       2²¹   /11        2,097,152     2 M
11111111111100000000000000000000   FFF00000   255.240.0.0       2²⁰   /12        1,048,576     1 M
11111111111110000000000000000000   FFF80000   255.248.0.0       2¹⁹   /13          524,288   512 k
11111111111111000000000000000000   FFFC0000   255.252.0.0       2¹⁸   /14          262,144   256 k
11111111111111100000000000000000   FFFE0000   255.254.0.0       2¹⁷   /15          131,072   128 k
11111111111111110000000000000000   FFFF0000   255.255.0.0       2¹⁶   /16           65,536    64 k
11111111111111111000000000000000   FFFF8000   255.255.128.0     2¹⁵   /17           32,768    32 k
11111111111111111100000000000000   FFFFC000   255.255.192.0     2¹⁴   /18           16,384    16 k
11111111111111111110000000000000   FFFFE000   255.255.224.0     2¹³   /19            8,192     8 k
11111111111111111111000000000000   FFFFF000   255.255.240.0     2¹²   /20            4,096     4 k
11111111111111111111100000000000   FFFFF800   255.255.248.0     2¹¹   /21            2,048     2 k
11111111111111111111110000000000   FFFFFC00   255.255.252.0     2¹⁰   /22            1,024     1 k
11111111111111111111111000000000   FFFFFE00   255.255.254.0     2⁹    /23              512
11111111111111111111111100000000   FFFFFF00   255.255.255.0     2⁸    /24              256
11111111111111111111111110000000   FFFFFF80   255.255.255.128   2⁷    /25              128
11111111111111111111111111000000   FFFFFFC0   255.255.255.192   2⁶    /26               64
11111111111111111111111111100000   FFFFFFE0   255.255.255.224   2⁵    /27               32
11111111111111111111111111110000   FFFFFFF0   255.255.255.240   2⁴    /28               16
11111111111111111111111111111000   FFFFFFF8   255.255.255.248   2³    /29                8
11111111111111111111111111111100   FFFFFFFC   255.255.255.252   2²    /30                4
11111111111111111111111111111110   FFFFFFFE   255.255.255.254   2¹    /31                2
11111111111111111111111111111111   FFFFFFFF   255.255.255.255   2⁰    /32                1



Monday, June 8, 2015

Email protocols

There are 3 main email protocols used : POP3 and IMAP for mail retrieving and SMTP for sending emails.

Acronyms :
POP (Post Office Protocol)
IMAP (Internet Message access protocol)
SMTP (Simple mail transfer protocol)

POP3 downloads the emails from the server (and if not specified to keep a copy it also deletes the emails) - you have to make rules to filter the email on every client individually and if you lose the email client database you lose all your filters and emails.
Pop3 is good if you have a low email quota and you like your privacy (because as soon as an email is read is deleted from the server) 

IMAP synchronizes you folders and email from the server to you mail client and does not delete the messages unless you delete them.
Main advantage to imap is the it syncs your emails,folders etc the same way on any device.

POP3 : 110 and secure POP3 with SSL/TSL 995
IMAP : 143 and secure IMAP with SSL/TSL 993
SMTP : 25 and secure SMTL with SSL/TSL 465 

SMTP port is 25 and is usually blocked by the ISP to prevent spam by infected users.

Thursday, May 7, 2015

Install terminal services and .NET Framework 3.5 on windows server 2008 2012 r2 standard

Open Server Manager (type in start menu to find it) - or Control Panel - System and Security - Administrative Tools - Server Manager
or Right click My Computer - Manage

Server 2008 :
Click Roles - then click - Add Roles
On the Before You Begin - Click Next
On Server Roles - select Remote Desktop Services - formerly known as Terminal Services
Continue the wizard.

To install .NET Framework 3.5
Open Server Manager
 Click Feartures- then click - Add Features
 Select .NET Framework 3.5 

 Server 2012 :
Mange - Add ROles and Features -- same as above
On 2012 you have to specify additional path to windows 2012 dvd

Tuesday, May 5, 2015

Error loading dll file

Error loading midas.dll

regsvr32 midas.dll for registering a file
regsvr32 /u midas.dll for unregistering a file

http://en.wikipedia.org/wiki/Regsvr32

Monday, May 4, 2015

Diskpart - hide or unhide a partition in windows

Type in a cmd : diskpart
To hide a partition type :
list volume
select volume 2
remove letter d
To make it appear back : 

select volume 2
assign letter d


If you mount the ESP partition like this, in windwos 10 you get an error message that you are not allowed to access it.
Open Task manager -> Run new task -> Browse.
Here you can access, edit, create, delete files. 


Or open Disk Management : diskmgmt.msc
 Right click on a partition and select - Change Drive Letter and Paths...
and then add or remove a letter.


Friday, April 3, 2015

WOL from the internet + remote desktop connection

First enable wake-on-wan from the network controller in windows.



First set on your router a static dhcp reservation on you mac address.

Then set a port forward on the router for port 7 UDP to your reserved ip.


Configure a dynamic dns on the router, for exemple if your router has support you can use for free no-ip.com

To wake-up you need :
  • MAC Adress
  • Public ip or dynamic dns address
  • Port number

Next you will probably will want to make a Remote Desktop Connection to your pc.
For this you have to forward TCP port 3389 to your pc ip address.

On the Remote Desktop settings select Allow connections only from computers running Remote Desktop with Network Level Authentification (more secure)
Click Select Users and add your username.
You MUST have at least a PROFESSIONAL version of windows to be able to do remote desktop connection to the computer.

And last install from android market a Wake on Lan


Saturday, March 28, 2015

How to configure a dns and an email server on windows 7

I used Simple DNS Plus and Quick ‘n Easy Mail Server - note that both are not free software but you can try them in trial mode.
You will also need and EML file viewer because the emails are saved as .eml files.
Get FREE EML File Viewer from here

They are very strait forward to configure.
In Simple DNS Plus - Select Records and add a Primary zome.
Then add in your zone an MX-record and make some inquiry to see if everything is ok.

To check if your mail server dns settings are good, open a cmd and make an inquiry :

nslookup -q=mx mydomain.com 
         (uses your isp or local dns server to resolve)
nslookup -q=mx mydomain.com 8.8.8.8 
(using specified Google dns server 8.8.8.8 to interrogate for our domain - I recommend this as it is almost instant update)

To check local open port on your system/server use CurrPorts if you want a Gui or netstat

For dns you have to open port 53
For email you have to open ports : 25,110

You have to port forward ports 53, 25, 110 if you have a router.

You can use this site to check if your ports are open : http://tagclouds.ro/openports.php

 Additional information :

To clear dns cash in windows in cmd type : ipconfig /flushdns
To see in browser new changes made to dns change your dns to 8.8.8.8 ( google dns) 

Sunday, March 8, 2015

Dxtory does not start recording games

Dxtory does not recognize game/show FPS.

If you record your games with an OSD like MSI Afterburner/RivaTuner, you have to ckeck in the
Dxtory - Advanced  Settings - Delay Hook - checkbox.

Also you must first start Dxtory then start the game, it will automatically create a profile for the game, then start  MSI Afterburner/RivaTuner, and it will record with you OSD.

If you turn the stealth mode on in Rivatuner you can record while the OSD is up, but it won't show up in the video.

You can get dxtory from here : http://exkode.com/dxtory-features-en.html
You should use it with the Lagarith codec (that supports multi-threading) from here : http://lags.leetcode.net/codec.html
so you can record without full loading one of the cores of your cpu, that will have bad effects on your fps.

Tuesday, February 17, 2015

Hiren's Boot USB Stick

Hirens Boot CD 15.2 USB

1. You need a USB stick of at least 1GB
2. Download Hiren's Boot CD 15.2 from here
3. Download Universal USB Installer from here