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Netgear AC750 Wifi Range Extender (EX3700)

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Posted by: z24 | Sun, Jul 24 2016 | Category: /hardware | Permanent link | home
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LAN messaging with XMPP protocol (jabber) to chat or to copy and paste links and texts in rdp sessions

Here is how I satisfied my need to have a LAN messaging program, not really to chat with other users on the same LAN, which I could do, but to copy and paste links or texts between a rdp client and a rdp server when copy and paste from/to clipboard does not work in rdp sessions, for instance with some Android rdp clients.

These are the programs I used:

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Posted by: Z24 | Wed, Aug 27 2014 | Category: /software | Permanent link | home
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Create a VPN to connect from an Android client to a home Windows XP server

If you want to connect to your home computer using rdp when you are not home and are connected to the internet, you have to open a port on your firewall; changing the standard rdp port on both your server and your firewall increases your security (or decreases your unsecurity); configuring a Virtual Private Network (VPN) increases your security even more, and you can close the rdp port on your firewall: in fact, when you connect your remote client to your vpn, your remote client comes inside your LAN so that you can remote access your server from inside the LAN.

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Posted by: Z24 | Sun, Sep 22 2013 | Category: /windows | Permanent link | home
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CodeLobster

CodeLobster
License: Freeware (registration required); Professional version is shareware and it's included with the freeware version for a trial period, after that the professional version's features are disabled.
Author: CodeLobster Software
Install: yes, but in the setup process there's a check to choose between portable and classic setup.
Size: about 50 MBytes (about 17 MBytes setup)
Requirement: Windows ME or later

CodeLobster is an application to develop in PHP, HTML, CSS, Javascript languages (it's a free IDE -integrated development environment- supporting autocomplete, highlighting, and PHP debugging), but it has some features which need to be noted because they are so good, and rare to find all in just one program, that you don't need to be a developer to use CodeLobster.

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Posted by: Z24 | Mon, Aug 13 2012 | Category: /software/windows | Permanent link | home
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.htaccess: an example of the Apache per-directory configuration file

Using bloxsom as my weblog designing application, I had to provide some settings to the Apache .htaccess configuration file to fine-tune the usage of my site:

  1. tell Apache to load index.cgi in addition to the default index.htm
  2. rewrite the requested address adding www. if it's omitted
  3. rewrite the requested address adding index.cgi if it's omitted
  4. and for bandwidth reduction, forbid robots from crawling some pages
(Updated May 17 2014)

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Posted by: Z24 | Wed, May 04 2011 | Category: /configurations/both | Permanent link | home
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How to force Firefox to open in a new tab a link that tries to open a new window

Type about:config in the address bar, read the warning and confirm.
Then change the value of browser.link.open_newwindow.restriction to 0.
Done.

See mozillazine about:config FAQ for a detailed description of the variables and values.

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Posted by: Z24.firefox | Sun, Mar 15 2009 | Category: /configurations/both | Permanent link | home
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Setting ClearType when fonts are too much thin

With my LCD monitor, a LG 1718S, the characters appear too much narrow on the screen, especially using Excel sheets: I tried all OSD settings but the characters are so much thin that they're almost invisible. I got the best results setting the ClearType effect:
Control Panel, Display, Appearance, Effects, Use the following method to smooth edges of screen fonts: Clear Type
This way the characters appear a little fatter and they're better looking too.
Normal ClearType
Verdana without ClearType Verdana with ClearType
Spreadsheet without ClearType Spreadsheet with ClearType

Yes, I use light grey background color :)

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Posted by: Z24 | Tue, Jan 27 2009 | Category: /windows | Permanent link | home
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3Com OfficeConnect ADSL Wireless 54 Mbps 11g Firewall Router

This 3Com product has many functions: router, firewall, adsl modem, wireless access point, 4 port switch. 3Com chose to give two names to its products: a name for the market (as the long name in the title), which identifies the purpose of the product and is not changed when a new model replaces the older one, and a model name, a number which identifies the specific model.
The "ADSL" term in the name is particularly useful to specify that it's a adsl modem too, with a RJ-11 port that would connect the router directly to the phone line, through a RJ-11 cable, just like any adsl modem; in fact I found several routers that were capable of routing the adsl signal but were equipped with a RJ-45 port instead of a RJ-11 port: they were not DSL modems and needed to be connected to an external DSL modem. Checking the rear of the product, maybe on the user guide, can help making sure the router is a DSL modem too.
I will review two 3Com OfficeConnect ADSL Wireless 54 Mbps 11g Firewall Router models, the older 3CRWDR100A-72 and the newer 3CRWDR101A-75.

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Posted by: z24 | Sat, Dec 22 2007 | Category: /hardware | Permanent link | home
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Recover "Logical sector size is 0" with dd

A few hours ago while I was using my pc suddenly Windows froze completely (mouse was stuck and Ctrl+Alt+Del did nothing). It's not astonishing but I was quite surprised because such a freeze never happened since I began using Windows XP on my new pc.
The problem appeared at the reboot: grub, the bootloader on /dev/sda, showed this error message:

13 : Invalid or unsupported executable format

I have a dual boot configuration with Windows XP booting from a EIDE disk and Ubuntu booting from a SATA disk, so I entered Ubuntu, successfully; /dev/hda1 (the Windows partition) was not mounted while /dev/hda5 and /dev/hda6 were; attempting to mount it resulted in

Special device /dev/hda1 does not exist

At reboot I started Windows XP Recovery Console from the Windows CD and tried CHKDSK.EXE, and this was the outcome:

The volume appears to contain one or more unrecoverable problems

I booted again linux to launch fsck and see it fail:

Logical sector size is zero.


Then I found the solution in ubuntu forum:
root@am2:/home/z24# dd if=/dev/hda1 of=/defmedia/bkup_fat32_hda1.img bs=512 count=2048000 conv=noerror,sync
2048000+0 records in
2048000+0 records out
1048576000 bytes (1.0 GB) copied, 43.61 seconds, 24.0 MB/s

root@am2:/home/z24# dd if=/defmedia/bkup_fat32_hda1.img of=/home/z24/sector6.bin bs=512 count=1 skip=6 conv=noerror,sync
1+0 records in
1+0 records out
512 bytes (512 B) copied, 0.011544 seconds, 44.4 kB/s

root@am2:/home/z24# dd if=/home/z24/sector6.bin of=/dev/hda1 bs=512 count=1 conv=noerror,sync,notrunc
1+0 records in
1+0 records out
512 bytes (512 B) copied, 0.030644 seconds, 16.7 kB/s
Explanation: In the original post the partition that was just backupped with dd was also checked with losetup and mount. Thanks a lot to the ubuntuforums user Onlymee for his post!
Update 13.09.2008
The same problem happened again today and gave me the opportunity to complete the series of error messages :)
The first, at boot time, was the same:

grub: 13 : Invalid or unsupported executable format

Mounting the partition (mount -t vfat /dev/sda1 /mnt):

mount: wrong fs type, bad option, bad superblock on /dev/sda1, missing codepage or other error

dmesg | grep sda1

VFS: Can't find a valid FAT filesystem on dev sda1

But fdisk -l /dev/sda shows the partition table.
fsck.vfat /dev/sda1 (executed from Ubuntu 8.04 alternate cd)

Cluster size is zero

The solution was exactly the same: copy the sixth sector back to the first. And voilà, it booted.

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Posted by: z24 | Sun, Jun 24 2007 | Category: /hardware | Permanent link | home
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Accessing and changing the registry from outside Windows

Problem: I got myself locked out of my pc
Solution: access the registry from outside Windows and change the account lockout settings

After enabling Remote Desktop access to access from my notebook to my pc through my wireless LAN, I was playing around with account locking settings to defend from possible brute force attacks coming through the WLAN (supposing the attacker cracked the WPA-PSK password): I set the lock so that after two failed attempts to login the account would be locked until the administrator (me) unlocks it manually.
I wanted to adopt such a security measure for RDP access only, but unfortunately the account lockout policy is valid for any login attempt, being it local or remote.
Then, as a slight security measure, I also disabled the administrator user (my user is already an administrator and an attacker should also find a valid username).
I mistyped the password twice and I got myself stuck: administrator and guest were disabled and my account was locked.
After rebooting, at the logon screen there were no more users, so that the "To begin, click your username" sentence on the left sounded like a joke, having absolutely nothing on the right.

The solution was obvious:

  1. try to access and change the registry from linux (I have dual boot)
  2. manually restore a previous version of the registry

I solved using Offline NTPassword & Registry Editor, an offline regitry editor on a boot disk; I made the floppy, rebooted and then I started looking in the registry the affecting keys, but it was not necessary: there's a feature to edit the accounts, and that allowed me to enable the administrator.

I also found dumphive, a useful program to dump the registry hives to text files.

Instead on www.beginningtoseethelight.org there's plenty of Windows NT, 2000 and XP low level settings and hacks, I would say "all about the registry": for instance, where and how users and passwords, including account statistics and policies, are stored and encoded in the SAM hive of the registry, and a schematic explanation of the registry structure; and don't miss the other sections of the site, they're enlightening too.
About the second option, there's a Microsoft article that explains how to manually restore the registry to a previous state.


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Posted by: Z24 | Fri, Apr 20 2007 | Category: /windows | Permanent link | home
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FileDate Changer

FileDate Changer
License: freeware
Author: NirSoft
Install: no
Size: 50 KBytes
Requirement: Windows 95 or later, comctl32.dll

With this very little tool you can change the Created/Modified/Accessed dates of one or more files at the same time.

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Posted by: Z24 | Fri, Mar 16 2007 | Category: /software/windows | Permanent link | home
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Convert

Convert
License: freeware
Author: Josh Madison
Install: no (optional installer available)
Size: 560 KBytes (153 KBytes compressed)
Requirement: Windows 95 or later

Convert is a compact and simple unit conversion program: it converts distance, speed, pressure, temperature, time, volume, angle, area, mass, power, and many more measure units, and it allows to create custom conversions.

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Posted by: Z24 | Fri, Mar 16 2007 | Category: /software/windows | Permanent link | home
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Panorado Flyer

Panorado Flyer
License: freeware for private use
Author: Karl Maloszek
Install: yes
Size: 250 KBytes (114 KBytes installer)
Requirement: Windows with COM support

Panorado Flyer is a compact program that gathers GPS coordinates from Google Earth and writes them into images EXIF information.

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Posted by: Z24 | Fri, Mar 16 2007 | Category: /software/windows | Permanent link | home
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CamStudio

CamStudio
License: freeware
Author: RenderSoft
Install: yes
Size: 8 MB (1.3 MB install), 33 KB codec
Requirement: Windows 95 or later, comctl32.dll

CamStudio is a free screen and audio recording tool and comes with a swf flash converter and a lossless codec.

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Posted by: Z24 | Fri, Mar 16 2007 | Category: /software/windows | Permanent link | home
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AMD Cool'n'Quiet

I'll try to answer these questions:

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Posted by: Z24 | Sat, Feb 17 2007 | Category: /configurations/both | Permanent link | home
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Remove XP Pro or Win Server 2003 bandwidth limit

Run Group Policy (gpedit.msc) and go to Computer Configuration -> Administrative Templates -> Network -> QoS Packet Scheduler and change "Limit reservable bandwidth" to "Enabled" with a value of 0%. By default it appears disabled but read the description and you'll discovered it's enabled with a value of 20%.

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Posted by: Z24 | Sat, Oct 28 2006 | Category: /configurations/windows | Permanent link | home
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Seeing MySQL queries, just like MS SQL Profiler

Just execute mysqld with the --log[=filename] or -l[=filename] command-line option. If filename is omitted, hostname.log will be created in the mysql data directory.
Or edit my.ini adding log=filename line (i.e. if you use WAMP).
Then restart mysqld.

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Posted by: Z24 | Sat, Oct 21 2006 | Category: /configurations/both | Permanent link | home
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Blosxom: How to insert a fixed path for images in Blosxom

I wrote some post on my new site created with Blosxom and I wanted to insert some images that I put in a directory called images under my website address root.
I found different solutions:

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Posted by: Z24 | Sun, Sep 10 2006 | Category: /configurations/both | Permanent link | home
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WAMP & Perl - Windows Apache, MySQL, PHP with CGI scripts written in Perl

I need Perl to run Blosxom, an open source and free CGI script to create blogs.
So I installed WAMP5 1.6.4a and ActivePerl 5.8.8.817 with MSI installer.
I already have my site on my disk, so I told my site directory to WAMP during the setup procedure and then I pointed my browser to http://localhost/index.cgi but it displayed the cgi instead of executing it.
This is what I did to make it work:

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Posted by: Z24 | Sun, Sep 10 2006 | Category: /configurations/windows | Permanent link | home
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Running PHP scripts from command-line with WAMP (Windows Apache, MySQL, PHP)

On my old pc I installed Apache, MySQL and PHP singularly, and I made some PHP scripts to be runned from command-line, like this:

c:\php\php -f myscript.php
On my new pc I installed WAMP5 1.6.4, all was running fine (phpMyAdmin, my local website, php scripts pointed to by the browser) but php scripts launched by command-line reported
Fatal error: Call to undefined function mysql_connect() in myscript.php
Obviously I changed the php path to c:\wamp\php\php but with no results.
Solution: change the command to
c:\wamp\php\php -c c:\wamp\apache2\bin -f myscript.php
The -c option tells php to search php.ini in the directory specified, and that's needed because WAMP puts php.ini in Apache bin directory, while with a PHP regular installation php.ini is located in the php.exe directory.

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Posted by: Z24 | Sun, Aug 27 2006 | Category: /configurations/windows | Permanent link | home
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