Tips & tricks

First, install the optional component from Tools  section of Wireshark installer Then, select config gear of the SSH remote capture  from the welcome screen Configure the following information:           Server ip/hostname and port     Remote user name and private rsa key in OpenSSH format (use puttygen > conversions > export openssh key)  (user and password should work too) You shouldn't have to change anything in Capture tab If you get an error linked to Kex algos: Error by extcap pipe:  ** (sshdump.exe:8216): WARNING **: Error creating connection. ** (sshdump.exe:8216): WARNING **: Connection error: kex error : no match for method kex algos: server [curve25519-sha256,curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group14-sha256], client [diffie-hellman-group14-sha1,diffi...

I wasn't able to set together a virtual mac address and a static IP using netplan: either the mac address didn't change, or IP was not set. I finally got the trick using a fake nic definition that matches the new virtual mac address I've set.    network:   renderer: networkd   ethernets:     ens160:       match:         macaddress: 00:0c:29:5a:69:00       macaddress: 00:50:56:0c:de:a6     ens160_2:       match:         macaddress: 00:50:56:0c:de:a6        addresses: [ 139.99.5.72/32 ]       nameservers:         addresses: [ 8.8.8.8 ]       routes:       - to: 0.0.0.0/0         via: 139.99.5.254      ...

apt install bluez hciattach /dev/ttyAMA0 bcm43xx 921600 systemctl restart bluetooth #1

As Ubuntu does officially support Raspberry PI 3 (arm64 and armhf) starting with 18.04.2 , I gave a try to the 64 bit version to be able using dotnet core with MongoDB as the later is discontinued in 32 bits architecture. I've downloaded and extracted the 32bits version of  aspnet core as the arm64 is not yet supported. But I've quickly found myself ending with an issue when trying to run the armhf dotnet app: -bash: /opt/dotnet/dotnet: No such file or directory Even if all the dotnet prerequisites were met. A few Googling hours later, I've figured out that, by default, no 32 bits (armhf) libraries are installed. Thought that can be done simply. First allow the armhf repository to be used in addition of arm64: dpkg --add-architecture armhf apt update Then add the armhf flavor of the dotnet prerequisites: apt install libunwind8:armhf gettext:armhf libc6:armhf libssl1.0-dev:armhf You can now enjoy running aspnet core 2.2 apps on a arm64 ubuntu 18.04 :-)...

apt install openjdk-8-jdk apt install nodejs ln -s /usr/lib/jvm/java-8-openjdk-armhf/jre/lib/arm/client/libjvm.so

Mount the SD card on Windows or Linux. Grab the latest LibreElec image file from https://libreelec.tv/downloads/ Extract the kernel.img and the SYSTEM files from the downloaded file. Replace the existing  kernel.img  and SYSTEM  files on the SD card with those two files. Put back the SD card in the RPi and all should be fine. #1

In Zabbix, simple checks are done by the Zabbix Server or Proxy on the default agent IP address, usually the internal one. If you would like to monitor some services like SSH or SMTP using the external IP address, simply add another Agent Interface with the external IP. Then choose the external interface in the item configuration:

Simply press WINDOWS KEY+ALT+SPACE :-)

If you got the error message "Cannot download packages whilst offline" but your internet connection is active, this is probably because you've managed the network configuration yourself and the network manager is reporting an offline status even if it's not correct. To fix this issue, simply edit the file /etc/NetworkManager/NetworkManager.conf and change the following configuration to be inline with: [ifupdown] managed=true Then restart the Network Manager : sudo service NetworkManager restart #1

In order to get TeamViewer running smoothly (without lag, or simply cannot install) when no monitors are connected, you need to emulate one. This is done by creating (or editing) this file : /usr/share/X11/xorg.conf.d/xorg.conf And add the following content : Section "Device" Identifier "Configured Video Device" Driver "dummy" EndSection Section "Monitor" Identifier "Configured Monitor" HorizSync 31.5-48.5 VertRefresh 50-70 EndSection Section "Screen" Identifier "Default Screen" Monitor "Configured Monitor" Device "Configured Video Device" DefaultDepth 24 SubSection "Display" Depth 24 Modes "1024x800" EndSubSection EndSection Reboot the computer #1

Simply install the french language pack, even if it's not set as the OS's UI language:

In your backup task, simply drill down in the folder tree to select only a few folders amongst the whole set of folders you would like to backup in order to keep the backup size and time reasonable. When the backup task succeeds, edit the task and add a few folders more.  Then relaunch the backup task. The Synology Hyper Backup service will only backup the freshly added folders and data that has changed from the last succeeded backup task. Reapeat that operation untill all the folders are backuped.

For an unknown reason, my tp-link Wifi extender has suddenly stopped working. In fact, it didn't find anymore the DHCP server, even connected to the root Wireless network. In the network interface of a device connected to the AP I saw the following parameters obviously set by the AP as this was not in my home network range: DHCP server : 192.168.0.254 DNS server : 192.168.0.254 Gateway : 192.168.0.254 So I've simply entered this ip address in a browser from a client device of the AP, using admin/admin as user and password and set a static ip address to the AP (in Network > LAN) and disabled the embedded DHCP server (in Network > DHCP settings).

If you are not able to connect to your VMWare Server using the vSphere client but you are sure that the VMWare server is up and running, try this : If you have enabled the ssh service connect to the SSH console of the server and type : services .sh restart This will restart the services without stopping the virtual machines

Simply launch the Execute dialog hitting the Windows + R keys at the same time and type: iexplore Then click on OK or push on ENTER 

using System; using System.Text; using Microsoft.Web.Administration; using System.Linq; internal static class Sample {     private static void Main( string [] args)     {         using ( ServerManager serverManager = new ServerManager ())         {             foreach ( var ap in serverManager.ApplicationPools)             {                ap.Recycling.PeriodicRestart.Time = TimeSpan .Zero;             }             serverManager.CommitChanges();         }     } }

Few days ago, I couldn't connect to my synology backup NAS because I've reset my phone and therefore lost my Google Authenticator's data. When I've tried to click the "Lost my phone" link, I got a message : you have exceeded your emergency code limit As this is a backup NAS, I've enabled only few services, i.e. not SSH. And there is only one administrator account on this NAS. I didn't wanted to reset my NAS and reconfigure all parameters. Hopefully for me, rsync was enabled and I had another nas available with 2FA enabled also. So I've simply overriden the google_authenticator file using rsync. That also lets me now to connect to my both NAS using the same code :) Here is the command line : rsync -avzh /usr/syno/etc/preference/admin/google_authenticator root@192.168.1.2:/usr/syno/etc/preference/admin/ 192.168.1.2 is the ip address of the NAS I wanted to get access you have to use 'root' user, not 'admin'. And the...

The HIPS module does not allow LogMeIn to use ALT+CTRL+DEL on the Windows Logon Screen on the server version of Eset Antivirus (called Eset File Security). You may simply disable the HIPS functionality but that requires a server reboot and that let your server with a weaker protection. Or you can follow those steps :

On the watchguard firewall, check that the Gateway Phase 1 mode is set to "Main" and not "Aggressive" :