Linux – Page 2

ABillS. Installing and configuring Callcenter

Once in one company, in order to simplify the search for callers in ABillS, it was necessary to install the Callcenter module, which has different capabilities, but what we needed was pop-up notifications in the browser with a link to the caller’s page.

Solution “load cannot follow 20 redirections”

Once I edited a lot of .htaccess files and noticed that one page stopped opening, and the logs had a message:

Asterisk. Music on hold

In this article, I will provide examples of changing music on hold, force music on hold, and more.

Google error “Failed to establish SSL secure connection to host”

Once, a user in Gmail set up mail import from a mail server running on iRedMail and received an error in response:

Using BNG Blaster

BNG Blaster is a testing tool, it can create thousands of virtual PPPoE and IPoE clients to test the performance of access servers, it also supports IGMP, QinQ, IPv6, etc.

Dovecot. Autoclean email in Trash

I will give an example of automatic deletion of emails that are in the Trash and Junk/Spam folder, by the way, you can delete emails in other folders in the same way.

Blocking SPAM behind a NAT server

In this article I will give an example of detecting and blocking the sending of spam messages behind a NAT server.

Changing hostname after installing iRedMail

Once I installed iRedMail on one Ubuntu Server and later I had to change the domain that I specified during installation, so in this article I will describe where I changed it.

Solution “Client did not reuse SSL session from control channel, rejecting data connection”

I once ran ProFTPd with TLS and users connected successfully, but one client was trying to transfer files via cURL and got the error:

Solution “111 Connection refused while connecting to upstream”

Once I noticed an error in the /var/log/nginx/error.log: