Tag Archives: Instructions

Highlight Portraits on Photographs by Blurring the Background

Posted on 13. January 2012 by robert

It is a popular artistic means for portrait photos, to highlight the portrait, by bringing the background out of focus. If you do not care for all the technical details, but simply want to know, how to achieve it, can jumpt directly to the Results in brief jump.

Content

1. First approaches to unsharp masking

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Posted in See all German articles, Other, Photography, Connect-4 | Tagged , , | Leave a comment

How to configure Thunderbird to digitally sign and encrypt emails using S / MIME?

Posted on 24. February 2011 by robert

The device involves the following steps:

  1. Production of a certificate with the public and private keys in the web browser
  2. Export the certificate to a file
  3. Import the certificate into Thunderbird
  4. Configuration of the certificate in Thunderbird

On the Wiki Thunderbird, , the essential technical explanations mail encryption and signing using S / MIME.

This is the beginning of the article How to configure Thunderbird to digitally sign and encrypt emails using S / MIME?. View the full article (927 words, 19 images, estimated 3:42 Min. Reading time)
Posted in See all German articles, Computer, Encryption | Tagged , , , , , , , | 1 How

How to configure Thunderbird for encryption and digital signing of emails with Enigmail / GnuPG

Posted on 23. February 2011 by robert

With the add-on "Enigmail for Thunderbird, it is very easy and comfortable to encrypt and digitally sign e-mails. This add-on used to encrypt the program package "GnuPG", you must also install the.

Also los:

On the side gnupg.org the appropriate package for your operating system Download. (click on "FTP", outlined in red in the screenshot)

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Posted in See all German articles, Computer, Encryption | Tagged , , , , , , , , | 1 How

Stun server configure in Pidgin

Posted on 8. November 2010 by falko

In the current version of Pidgin 2.7.5 can be in the settings (Menu / Werzeuge / Einstellungen / Netzwerk) Enter a STUN Server. A STUN server is used to, that a computer (or. In this case, Pidgin) can find, on which public IP address (and what UDP port) He can be reached, when it is itself a local IP, p.E.. has the power 192.168.xy. This is important for file transfers, where between two chat partners usually a direct connection is established.
Unfortunately, the designation “STUN-Server” Pidgin in the settings not quite right. Because Pidgin is realistic to expect there not to specify the STUN server, but the specification of a domain, within it then looks for a STUN server.
An example to illustrate:
The STUN server of the provider “Sipgate” has address stun.sipgate.net.
Now I would have expected, that you just must enter this address in pidgin, if you want to use the STUN server from sipgate. – Not at all!
In this case, try Pidgin by DNS for a STUN server and asks for:
SRV _stun._udp.stun.sipgate.net
Pidgin is looking for a server that is (SRV) in the domain stun.sipgate.net for the STUN protocol, reached by the UDP is. There is none. But under the domain sipgate.de he would find. And actually – when sipgate.de enters into the Pidgin settings, asks for Pidgin SRV _stun._udp.sipgate.de and receives a response SRV stun.sipgate.net , then uses the pidgin.

Permanent link to this post (209 words, estimated 50 SEK. reading time)
Posted in See all German articles, Computer, Other | Tagged , , , , | 2 Comments

IPv6 Course part 2: Stable IPv6 addresses on the local network

Posted on 17. October 2010 by robert

For IPv6, Network Address Translation (NAT) not provided. Rather, it is among other Purpose IPv6, NAT to make it unnecessary. The corollary, principle that every computer has a publicly accessible IPv6 (However, the protected by the firewall or in the FritzBox. is blocked). It also means, that by default, change the local IPv6 is, if the public IPv6 change.
Also: If you have no fixed IPv6 subnet (and perhaps reasons of anonymity and will not have), then change the default, IPv6 addresses of all computers in local network accessible, if the router gets a new IPv6 subnet. Get the router using 6to4 tunnels are IPv6 subnet, then changes the IP every time IPv6, if the router gets a new IPv4.
In the local network but it can be useful, always use the same subnet. A local server can be configured in a manner, to only accept connections from that subnet. When the Web server is the apache for example with the following commands (“Ababa:Ababa:Ababa” replace the self-chosen prefix, see following paragraph):
deny from all
allow from fd00:abab:abab:abab:/64 192.168.178.0/24

This is the beginning of the article IPv6 Course part 2: Stable IPv6 addresses on the local network. View the full article (800 words, estimated 3:12 Min. Reading time)
Posted in See all German articles, IPv6 | Tagged , , , , , , | 2 Comments