How to change 15pin to 14pin VGA

If you have an old IBM PC with VGA and it’s only 1 pin where the normal is 15pin then don’t panic, it’s possible to change that by removing one pin and then it can connect to 15 pin monitor, you just need to remove it in one end and you have a 14pin to 15pin adapter cable 😉

Here is my modified 15 pin cable, just changed it in one end and it worked wih my 15 pin LCD monitor

Seems like one of the purposes for the one pin is that newer vga monitor can report it’s resolution back to the computer so you need to set that manually.

How to copy .img files to floppy with DD

If you are into retro computing and need to copy one of the old floppy .img disks to a diskette then it can be done with dd for unix/linux or by using the windows port of dd

My son learning to code Power Basic for DOS and switching floppies 😉

In my case i had 2 computeres with a floppy drive, one was a Windows XP machine and the other was a much older DOS computer without USB or network and i need to test FreeDOS and MS DOS 6.2 but i only had files like disk1.img downloaded from the internet and blank 1.44 floppy disks.

In my first attempt i tried to use a Windows program called winimage but it was not able to run on the old Windows XP, maybe it needed a servicepack or somthing else, so the fastest way was to find a simpler and faster solution and dd came in to my rescue.

here is How to copy a disk.img to floppy with dd

Unix/Linux

dd if=disk1.img of=/dev/fd0

Windows (DOS or CMD Console)

dd if=disk1.img of=\\?\Device\Floppy0

It can be downloaded at http://www.chrysocome.net/download

OR from my server https://www.pvangsgaard.com/download/dd-windows/

Prevent WordPress Brute-force attacks with fail2ban

Introduction

If you run wordpress on a Raspberry Pi then the chances are very high that you get attacked with many attempts and failed logins on you wp-login.php file.

In my case all these attempt showed up in my websites statistics as uniq ip’s that have had many tousands hits on my site…..it’s not only a security problem, but it also have a small impact on performance of your site, i was lucky my Pi 3 didn’t complain and was fast enough 😉

You can use the filters and jails in this post on other linux distributions, but the fail2ban and log files may be in a different place, i have made this to work for the Pi 3 with Rasperian (Debian)

Setting up fail2ban jail and filter rules

I assume that you allready have installed fail2ban

Open the jail configuration

sudo vi /etc/fail2ban/jail.d/defaults-debian.conf

Put this section in the file and save

[wordpress]
enabled = true
port = http,https
filter = wordpress
action = iptables-multiport[name=wordpress, port="http,https", protocol=tcp]
logpath = /var/log/apache2/*.log
maxretry = 30
findtime = 10800 ; 3 hours
bantime = 86400 ; 1 day

Make a filter file for wordpress

sudo vi /etc/fail2ban/filter.d/wordpress.conf

Make this section and save file.

[Definition]
failregex = ^<HOST> .* "POST .*wp-login.php
            ^<HOST> .* "POST .*xmlrpc.php
ignoreregex =

Restart fail2ban

sudo systemctl restart fail2ban

C64 Mini with US keyboard and USB-hub

Got an upgrade to my C64 Mini today, a USB2.0 hub and a US keyboad, that means that makes it easier for me to use the C64 Mini because many games requires some keyboard presses like hitting the F1, the spacebar or writing your name on a highscore.

The C64 was sold with a US keyboard and if you wanted to change that then you had to alter the ROM and that required a EPROM burner.

The C64 Mini can use a normal US keyboard and if you wan’t a nice one that is small then they are way to expensive here in Denmark, so i had to wait a month to get one from China, but with a price of 58,- kr with free shipping, it was ok with the waiting time…..the hub was “free” but had to pay 28 kr. i n shipping still very cheap.

The C64 Mini with an USB hub and US keyboard from Wish.com

Can’t wait to program BASIC with my son 😉

The C64 with a fullsize keyboard is expected to hit the danish stores (Elgiganten) in December also with a better joystick, look the same but with microswitches and much more robust. The joystick on the photo is the original and it’s better than expected, i have had the problems that other users have reported.