On 2023-12-18, the SEC Consult team published a security issue affecting many SMTP implementations. The problem results in some attack vectors bypassing important antispam/antispoofing mechanisms. This can cause major problems as mails can be injected into the mail flow that appear to come from a valid trusted source.

It …

Using a password safe can make the life much easier. You can store your passwords encrypted for each service and if you need a new password, there is a password generator included as well.

To have the same password safe on all Linux/Mac/BSD machines you can use KeePass …

If you're interested in software security you will have noticed that there where some bigger  security problems with widely used software the last year. The attention this problems get in common media raised the last two years. We had some big security problems in the past as well, just remember …

If you installed the server without GUI it may is useful sometimes to have a GUI output via ssh on an different computer.

You can connect with ssh to the server and present the output on you local machine by using ssh with the option -X. You need to be …

pfSense 2.0 is finally released now. This is quite a nice peace of software.

A lot of functionality like:

• VPN Gateways: OpenVPN, IPsec, PPTP
• IP and Portfiltering
• Webmanagement
• FreeBSD based
• Memory stick version available

Mac OS X brings a build in solution for secure erasing hard disks or usb devices. The option you should choose depends on what data where stored on the device you want to delete.

For example if you want to sell your old private hard disc with all your private …

In the time of free wifi and free internet connections in every hotel, bar or cafe you should be sure your connections are secure. In some cases you can't trust the connection but you need to go online and read some mails or share some documents. In this case some …