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Linux

linux Linux (centos / debian) notes

Soft Ether VPN Notes

To diable vpnserver from calling home, i.e. stop all the chit-chat for nat traversal and just use it as a normal vpnserver.

Step 1 dissable DDNS change the config file DDNS section to read:

declare DDnsClient { bool Disabled true }

Step 2 dissable UDP acceleration I did this from the config file by setting:

bool DisableUdpAcceleration true

Step 3, Disable Nat Traversal In the config file change the following setting.

bool DisableNatTraversal true

Step 4, turn off keep alive. This is via the GUI on the server encryption and network button.

Step 5, turn of auto update check. Again this is via the GUI on the server encryption and network button.

Having done the above (thanks to dnobori, for the ones I missed) and restarted the server, I know don't see any outbound / unexpected traffic.

Virtualization

virt All sorts on virtualization, Xen etc

Mac OSX

mac Mac related notes

Vodaphone useful numbers

vodafone Vodafone numbers

Apps and software

• software Applications notes (mostly web based apps, notes on configuring building apache,php,openssl etc)
• unreal Unreal tournament
• bitsBits and pieces
• asterisk Asterisk notes
• mwiki MediaWiki bits and bobs
• dovecot Things about dovecot and postfix
• Docmgr Installation notes

DNS

DNS related Notes on dns, mostly out of date

Mac DNS Mac DNS flush cache

Windows

To enable telnet

    Start
    Control Panel
    Programs And Features
    Turn Windows features on or off
    Check Telnet Client

Building Windows to go notes

partition disk.

Command Prompt with administrative rights

diskpart, (if you have already used the drive letters suggested below choose a different one and substitute it in the commands.)

List the available disks by running "list disk" and you should see your usb device.

Select your USB drive by typing "select disk #" and hit Enter. For example, “select disk 1”.

Clean the partitions on the disk by typing "clean" and hit Enter.

Now create the boot partition by running the following command:

create partition primary size=350
Now create the OS partition by running the following command to create a partition taking up all remaining space:

create partition primary
The boot partition needs to be formatted, configured and assigned a drive letter, run the following commands:

select partition 1
format fs=fat32 quick
active
assign letter=b

(if the b drive letter is already in use on your PC, substitute a different letter and replace b with your letter throughout the rest of this guide)
The same must be done for the OS partition, run the following different commands:

select partition 2
format fs=ntfs quick
assign letter=o

(if the o drive letter is already in use on your PC, substitute a different letter and replace o with your letter throughout the rest of this guide)
Exit Diskpart by typing Exit.

Extract wim file.

(from the windows 8/8.1 install media) sources directory.

dism /apply-image /imagefile:c:\path\installWIM /index:1 /applydir:o:\

add drivers (optional)

dism /image:u:\ /add-driver /driver:*BootCamp Directory*\Drivers /recurse

make bootable

o:\windows\system32\bcdboot o:\windows /f ALL /s b:

Certificates

Check key / cert are mached (also csr )

checking the modulus and the public exponent portions in the key and the Certificate must match.

But since the public exponent is usually 65537 and it's bothering comparing long modulus you can use the following approach:

$ openssl x509 -noout -modulus -in server.crt | openssl md5
$ openssl rsa -noout -modulus -in server.key | openssl md5

And then compare these really shorter numbers.

if I want to check to which key or certificate a particular CSR belongs you can compute

$ openssl req -noout -modulus -in server.csr | openssl md5

Electronics Related

Microphone pre-amp for apple mac

This simple circuit was built on vero board in a matter of 40 mins. Not pretty but it was made of mostly second hand bits, infact two of the resistors bellow where from a PC board from a 1980's computer!