Detect and block abuse of (cracked) e-mail account 
Friday, 28 February 2014, 10:45 - Postfix Stuff, Mail stuff
Posted by Administrator
To avoid bad things(TM) caused by a cracked e-mail account on our postfix mailserver, I used the script Check Auth Log to detect abnormal high numbers of logins or logins from many different IP addresses within a certain time onto a certain account. Then the script will lock out the account. This, together with per-session limits within postfix configuration (smtpd_client_message_rate_limit, smtpd_client_recipient_rate_limit), should help to avoid or at least mitigate the damage caused by cracked accounts, i.e. SMTP server being blacklisted.

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DNS Tools 
Tuesday, 22 October 2013, 23:00 - Tools & more
Posted by Administrator
Web Interface for DNS Queries.


Download the tarball


The "dig" tool must be installed on your system, and be allowed to be executed from php. If it doesn't work, e.g. if using safe_mode and/or open_basedir restrictions, add the path where dig is located to the two php options:
open_basedir /usr/bin/dig
safe_mode_exec_dir /usr/bin/
Within a VirtualHost, set with php_admin_value <option>.

In addition, TCP port 43 and UDP port 53 need to be open outbound.


Extract the content of the archive within your web root of the webserver, e.g.
cd <webroot>
tar xvzf dnstools.tar.gz


Navigate your web-browser to http://<your_host_name>/dnstools/ and enter either the appropriate form.

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Domain and Storage Hosting in Switzerland 
Tuesday, 21 May 2013, 01:49 - Announcements
Posted by Administrator
Website und E-Mail Hosting, Cloud Storage, Groupware and Virtual Servers (VPS) for reasonable prices and located in Switzerland.

Reselling of Domain Hosting under your own brand is also possible!
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Asus ASMB4 iKVM Remote Console 
Wednesday, 8 May 2013, 00:24 - Knowledge, Hardware
Posted by Administrator
A real PITA is to use the Console redirection of the integrated / optional iKVM of ASUS servers.

Access to the web-GUI (directly or even forwarded like tunneled through ssh to the iKVM's real ip behind a jump host) is quite straight-forward and easy to use.

But the console redirection slightly doesn't work even directly (server has the IP address you type in your web-browser) and with properly installed Java Web Start, at least with version 2.13 of the iKVM firmware.

So this workaround may help:
1. Log in to the Web-GUI

2. Start the Java console under Remote Control

3. Download the .jnlp file instead of opening Java Web Start directly
4. Edit the file as following:


(for example if you have forwaded or mapped the real port 80 to
8080, this has to be only the IP address WITHOUT the port)


(this has to be the port where the (local) Java Client will connect to the remote server's console and not '0', may also be another port when you do a port mapping or forwarding)

5. Now open the jviewer.jnlp file with Java Web Start.

The console should now show up...

(for all ports involved see the related link to the ASUS support site)

In some situations, there even the download of the JAVA files stucks with 0%. Perhaps then you experience some troubles with SSL because some INTEL ikvm will try to use HTTPS (even if you connect to the iKVM GUI with only HTTP). So use again a manually edited .jnlp file:

1. Download the jnlp file instead of opening directly

2. Change the line with the keyword codebase by replacing the "https://" with just "http://"
<jnlp spec="1.0+" codebase="http://<your_ikvm_ip>/Java" >

3. Open the jviewer.jnlp file with Java Web Start

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rsync to WebDAV drive 
Wednesday, 6 March 2013, 00:55 - Knowledge, OwnSpace
Posted by Administrator
For having an intuitive GUI synchronisation client, you may use grsync using a gvfs path on Linux or a Drive Letter on Windows where the WebDAV Storage is preliminary mounted. Or go for the commercial sync tool GoodSync which has WebDAV protocol built-in.

But now, when you try to synchronise with the WebDAV storage (e.g. to OwnSpace Web Storge or to Dropbox), you probably get many "file not found" errors and you end up with no files on the WebDAV storage.

To get that to work, you must use the rsync option "--inplace". Search for rsync options or an option meaning "directly write to files instead of temporary files".

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