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Setting up a mailserver, continued
In my last article on how to setup a basic mail server in debian using postfix and dovecot, I am now continueing on how to setup some basic spam filters. The reason to split this up, well I was stupid and assumed I wouldn’t need a spam filter yet. But I forgot that I also moved one domain to my new mail server that got 200 spam messages a day.
So now to repair my mistake I am adding the following features to my already existing mail server. To find out how to setup the mail server itself read my earlier article.
- Use spamassassin to mark spam in the header
- Change the mail delivery to dovecot LDA, this is needed for step 3
- Automatically move marked e-mails to the spam folder of the user
Sounds easy right. Well it should be ;-).
SSH setup login using certificates
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Loading ...Once you are running a linux server you can choose to do the login by username and password authentication or by certificate authentication. Personally I always choose for the latter as it is more difficult to intercept or hack in to.
Setting up certificate authentication is really simple. Just login to the machine as you would normally. Change to the user you are setting-up a certificate for and enter:
ssh-keygen -t rsa
You will be prompted for a password twice. After this is completed two files will be generated. One being the public file and one being the prive file. You need to download the private file from the server and store it somewhere safe. The public key needs to be copied to:
~/.ssh/authenticated_keys
After this you will be able to login to the server using your username and the private certificate. Please note that for Putty you will need to import the generated private key into puttygen and export it into a new private key. This is because Putty does not support the SSH generated private key.
Upgrading the HTC P3300, continued
After my first post on upgrading the HTC P3300 (Dopod P800 in the US) some time back it’s time for yet another post on this, see ‘Windows Mobile 6 on HTC P3300′.
This time round I’ve been playing around with two seperate versions of custom ROMs for the HTC P3300. The first one I’ve looked at is the ‘Black&Blue 5.0′ ROM, written by Tom. The second one is the ‘Oops Black 1.0′ also written by Tom. If you need information on how to install these ROMs then look at my earlier article and follow those steps, except you don’t install the Windows Mobile 6.0 ROM but one of the two below.
Black&Blue 5.0
Image of ROM Black&Blue 5.0
The main reason for me to use this ROM was that it was build on top of Windows Mobile 6.1. Why was this so important you may think. Well let me list a couple of nice new features in:
- Better usability with out using the styles
- A lot faster
Though it’s not a big list the first one was reason enough for me. Finally a Windows Mobile version that I don’t need a styles to operate. Some of the parts I really liked about this ROM was that it was really fast. And even better really stable. I’ve had no problems what so ever using this ROM.
You can download the ROM Black&Blue 5.0 here.
Oops Black 1.0
Image of the Oops Black 1.0 ROM
Like I stated before the second ROM I tested was a relatively new one written by Tom. The base of this ROM is identical to the Black&Blue one. It’s also running on Windows Mobile 6.1 and has more or less the same applications installed. One huge difference is that this ROM is attempting to emulate the Touch Diamond style.
For those of you interested in this please let me give you a warning in advance. The ROM looks a lot like the Touch Diamond, but it’s behaviour is nothing like it. So if you are interested in the eye-candy this ROM is for you. If you want the functionality behind it then buy the new phone.
You can download the Oops Black 1.0 here.
Warning notice: Please note that both of these ROMs have been written by a 3rd party, which means you’r phone operator will not support you if your phone breaks. As to support from HTC they might, but you did modify the phone without approval.
Synchronizer 2.0 Beta 1
A long time ago I released an early alpha version of Synchronizer. A tool that can automatically synchronize files between directories. Today it’s finally time for the first beta release. Which fixes a lot of problems people had when using the tool.
One of the first problems reported back to me was that the tool crashed whenever ran with some strange error message. Well appearantly this was caused by the .Net framework, a problem which I solved.
For a quick list of bug fixes:
- Program no longer requires .Net framework to run, which was a big bug in the early alpha release
- Logging is a lot more robust and stable, this actually caused some crashes in the past
- Memory usage is way down, solved a lot of memory leaks
- Solved a problem that for some systems directories were not created at the destination folder
- Solved a problem causing synching to mounted network folders to fail
Of course some things have not yet been solved, but are in the works:
- Multithreaded causes some logging problems and crashes (please be carefull with multithreading at this time)
- If debug information is enabled the memory usage is huge on large directories, on the Windows directory it rose to 89 MB.
If you find any trouble running it or it crashes on you then let me know, and if at all possible send me the log file created by the tool using the -dd option. That will help me track down the problem.
You can download it by clicking this text.
Gadget Time: iRiver Clix 2
Every time I get a new gadget or some new piece of software I will write something about it. Well this time round it’s the iRiver Clix gen 2.
I’ve been looking into getting a new MP3 player for some time and I looked over the Creative, iPod, Philips and Sony series. But finally I choose for the iRiver Clix gen 2. Why, well I’ll try and explain below.
