Sep 14 2021

How to copy directory with SCP

The Unix command scp (which stands for “secure copy protocol”) is a simple tool for uploading or downloading files (or directories) to/from a remote machine. The transfer is done on top of SSH, which is how it maintains its familiar options (like for specifying identities and credentials) and ensures a secure connection. It’s really helpful to be able to move around files between any machine that supports SSH.

When trying to copy directory like you usually copy a file with scp you may encounter the following scp error:
folder_name: not a regular file Continue reading

Sep 14 2021

How to set custom background in MS Teams

Custom-background-microsoft-teams-before-callMS Teams desktop client has around ten predefined background images and you can upload your own and choose it for your next call.

You can set custom background in Teams client as follows: Continue reading

Sep 08 2021

Reporting Services error 503: Error creating HTTP endpoint – Access is Denied

We had a case come in where they were seeing a blank page when they went to Report Manager for Reporting Services.  You may also see an HTTP 503 error.  This just means that the service had a problem and there was probably an exception that occurred under the hoods.

In this case, the issue was with SQL 2008 R2.  When looking at the Reporting Services Logs, we can see the following exception when the service starts. Continue reading

Sep 08 2021

SSH authentication refused bad ownership or modes for file

SSH keys authentication scheme

So you created SSH keypair, installed public key on the server you want to connect to but, probably, made this not as described in this article: How To Set Up SSH Keys and now the server refuses your key and in /var/log/secure we can see message like this:

Authentication refused: bad ownership or modes for file /home/user/.ssh/authorized_keys

or

Authentication refused: bad ownership or modes for directory /home/user/.ssh

or

Permissions 0664 for '/home/user/.ssh/id_ed25519' are too open.
It is required that your private key files are NOT accessible by others.
This private key will be ignored.
Load key "/home/user/.ssh/id_ed25519": bad permissions
Continue reading

Sep 02 2021

FOP2 and HTTPS cannot connect

FOP2-one-moment-pleaseI recently converted my FreePBX from a HTTP to HTTPS instance. On the same instance, I have Flash Operator Panel2 running on there. Prior to the change, FOP2 login screen or the /fop2 user console would popup rather quickly. After HTTPS was added, I’ve noticed that the login screen doesn’t popup for a little bit. I see the timer counting up to about 8 before any login box pops up. So FOP2 with HTTPS does not work and you can see “Connecting to server, attempt number ” message Continue reading

Aug 26 2021

Linux shell modes and Capistrano

This is possibly one of the most complicated support questions that can be asked, the only real answer is it depends.

It’s really a question of which kind of shell Capistrano is using, it’s a matrix of possibilities concerning login, non-login, interactive, or non-interactive.

By default Capistrano always assigns a non-login, non-interactive shell. Continue reading

Aug 16 2021

Uptime Percentage Chart

Uptime percentage chart shows how much downtime is allowed per year, month, week and day to correspond to a certain SLA level. Availability is usually expressed as a percentage of uptime in a given year. Continue reading

Aug 15 2021

How to limit the number of simultaneous calls in Asterisk PJSIP

In order to limit the number of simultaneous calls in Asterisk PJSIP, use the GROUP and GROUP_COUNT functions. Below is an example of Asterisk dialplan, where the quantity of simultaneous calls is limited to 1. Continue reading

Aug 15 2021

Vicidial: different carriers for different campaigns

VicidialIn Vicidial you can have many different campaigns and different carriers for them. Another case is when you want  to use one particular carrier for a campaign or few campaigns. Here is how you can configure your Vicidial to use different carriers for different campaigns. Continue reading

Aug 05 2021

Allow Access To Port in SELinux and Firewall

SELinux can be a pain at times if you don’t have a clear understanding how it works. A good chunk of resolutions around the web end up suggesting turning off SELinux completely. This, to say the least, is one of the worst things you can do to your server.

Allowing access to ports through SELinux is one of the things that came across while setting up Elasticsearch cluster on Cent OS servers and I wanted to share a quick run down of steps/commands required to allow a port through the firewall. In this example, we’ll be allowing access to port 8090. Continue reading

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