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  1. [server] Re: Spoofed SSH-attacks - how to find source?

    It is already running on a different port. Seems this attacker has done a portscan before.



    This keeps the attacker away but I still have hundreds of log entries of failed log-ins every day,...
  2. [server] Spoofed SSH-attacks - how to find source?

    Hi,

    I experience attacks to my dedicated server for some months. There is some automated script trying to break into the server by brute force. It is connecting to SSH and tries several usernames...
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    Re: Keep away massive SSH login attempts

    OK, update: fail2ban could massively reduce the hacking attempts, but not completely stop it. So an other question: is there a possibility to limit SSH-access based on the geolocation of the source...
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    Re: Keep away massive SSH login attempts

    Hi,

    fail2ban is a really nice tool and seems to do the job, so thanks for the hint!

    No idea why it is not installed by default on Ubuntu Server...
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    Keep away massive SSH login attempts

    Hi,

    during the last few days my SSHD-logfiles are full of entries like this



    Disconnected from authenticating user root 137.74.198.18 port 38522 [preauth] : 1 time(s)
    Disconnected from...
  6. [server] Re: Automatic fallback from one server to an other?

    OK, loadbalancer sounds good but I afraid I do not understand the general concept behind it. In my scenario, where should I run it, on server A or server B? And what happens when that sever dies...
  7. [server] Automatic fallback from one server to an other?

    Hi,

    I'm currently running a webpage on a dedicated server and now want to implement some as much as possible automatic fallback mechanism. That's what I have:


    Domain- and DNS-configuration...
  8. [ubuntu] Ubuntu 18.04: php mysqli works in CLI for root only

    Hi,

    I have the weird situation that PHP-scripts that make use of mysqli-functions work in CLI only for root but not for other users. That's what I have:

    1. A script containing following code:
    ...
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    Re: Double system symbols on XFCE-desktop?

    It is a plain and stupid Xubuntu with Libreoffice, Firefox and a few Games installed. There is not even a custom install repository added.

    Only thing worth to mention: I have an other problem with...
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    Double system symbols on XFCE-desktop?

    Hi, I have a strange problem with myXUbuntu/XFCE desktop. There the (system) symbols for trashcan, home directory and file system exist two times! Yes, two times the same icon, name, function and...
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    [xubuntu] New screen resolution is not applied

    Hi,

    after connecting a new display to my computer, the screen resolution does not fit any more (as it still has a VGA-connector, it is not detected automatically). So this is not a problem, I...
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    [ubuntu] Re: GRUB on a RAID system

    This is exactly the problem I described in my post. Now the question is: how can I fix this without completely repartitioning/reinstalling the whole server?
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    [ubuntu] GRUB on a RAID system

    Hi,

    I have a server running which started with Ubuntu 10.08. Over the years it was updated to Ubuntu Bionic and was equipped with a RAID-system. This now causes some problems. To make it short: I...
  14. [server] Signed .DEB-package - how to create trusted download archive?

    Hi,

    for some time I sign my .DEB-packages with

    sudo dpkg-sig --sign builder mypackage.deb

    This seems to be successful, after signing the .DEB package is larger. Now I have a server where...
  15. [ubuntu] Can't access internal network but Internet

    Hi,

    I have a strange problem with one Ubuntu-system in my network. As well as some other Linux-boxes it is located in an internal network in IP range 192.168.1.x with full access to all other...
  16. [ubuntu] Re: CanoScan Lide 120 scans black blank page

    For my scanner I found following solution: it works well but the orientation of the sliders are wrong - so when you configure it to produce lighter results, they become even darker. Means you have to...
  17. Suggest new software to be included in standard distribution?

    Hi,

    I would like to see the process control / HMI software from https://sourceforge.net/projects/oapc/?source=directory included in the standard Ubuntu distribution. Unfortunately I'm neither the...
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    [xubuntu] Re: CanoScan Lide 120: always black scans

    Finally I found the reason: it is a bug related to SimpleScan. When brightness is turned up in this program, the scans become darker (so this parameter works in the wrong direction). To make the...
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    [ubuntu] Run process on one core ecxlusively?

    Hi,

    I think about using a (somewhat) realtime application on a SoC with Ubuntu operating system. I know, typically a realtime Linux is needed for
    such a task. But: Since this hardware has really...
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    Remote access to desktop computer

    Hi,

    I have installed some friends an Ubuntu 15 system for their desktop computer. These are normal home-computers which are behind a WLAN-Router with integrated firewall. Their IP is dynamic,...
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    [xubuntu] CanoScan Lide 120: always black scans

    Hi,

    I try to get a CanoScan Lide 120 working with some very different results:



    Ubuntu 14 and the sane-drivers that are available via ppa:rolfbensch/sane-git (as described at...
  22. [ubuntu] Which easy-to-configure SIP server for 12.04 LTS?

    Hi,

    I'm planning to install a SIP-server on my Ubuntu 12.04 LTS which also supports TLS/encryption. I already tried Asterisk but it's configuration is a mess, dozens of huge and strange...
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    [ubuntu] Too much mail traffic

    Hi,

    my Ubuntu 12.04 LTS often shows me this in logwatch:



    --------------------- Postfix Begin ------------------------

    1 Miscellaneous warnings
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    [ubuntu] Re: Limited Desktop environment / Kiosk mode?

    Your serch criteria and the results in no way fit to my question - you would have see nthat when reading it. So thanks for nothing!
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    [ubuntu] Limited Desktop environment / Kiosk mode?

    Hi,

    I need to configure a Ubuntu system in a way where _one_ special user has only limited access possibilities.

    Means as soon as this user is logged in exactly one full screen application is...
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