I once ran ProFTPd with TLS and users connected successfully, but one client was trying to transfer files via cURL and got the error:
Continue reading “Solution “Client did not reuse SSL session from control channel, rejecting data connection””Author Archives: Vyacheslav
Solution “111 Connection refused while connecting to upstream”
Once I noticed an error in the /var/log/nginx/error.log:
Continue reading “Solution “111 Connection refused while connecting to upstream””Solution Invalid command ‘Header’, perhaps misspelled or defined by a module not included in the server configuration
Once I transferred one site from one server to another Ubuntu server and after installing Apache2 I noticed the following error in the logs:
Continue reading “Solution Invalid command ‘Header’, perhaps misspelled or defined by a module not included in the server configuration”How to return ethX names to network interfaces
I will give an example of returning the old scheme of names of network interfaces in the Linux operating system.
Continue reading “How to return ethX names to network interfaces”How to enable PHP-cURL
To enable the PHP-cURL extension on Linux Ubuntu/Debian, you must first install it with the command:
Continue reading “How to enable PHP-cURL”How to compile cURL on Ubuntu
Once it was necessary to compile the newest version of cURL, because there was a bug in the standard version from the Ubuntu Server 20.04 repository, and in the new version it was fixed.
Continue reading “How to compile cURL on Ubuntu”Solution AH00558: apache2: Could not reliably determine the server’s fully qualified domain name
Once after installing and configuring Apache2 on Ubuntu Server 20.04, I noticed the following error in the /var/log/apache2/error.log logs:
Continue reading “Solution AH00558: apache2: Could not reliably determine the server’s fully qualified domain name”Transferring Zabbix to another server
It took one time to transfer Zabbix server version 4.4.10 running on Ubuntu Server 14.04 to a new server running Ubuntu Server 20.04 and at the same time I updated Zabbix to version 5.2
Continue reading “Transferring Zabbix to another server”Solution “fping failed” and “item icmpping became not supported”
I once installed Zabbix Server 5.2 on Ubuntu Server 20.04 and noticed the following errors in /var/log/zabbix/zabbix_server.log:
Continue reading “Solution “fping failed” and “item icmpping became not supported””Zabbix. Dynamic Indexes
I have come across quite a few switches in which SNMP indices can shift, for example, depending on the number of added VLANs, that is, the first port will no longer be ifIndex.1, but for example ifIndex.5. On Mikrotik RB2011UiAS-RM, the sfp1 port is ifIndex.1, and ether1 is already ifIndex.2. In Huawei switches and OLT, I saw sky-high figures and, in addition, they also shifted. Therefore, in order not to create separate templates for the same device model, Zabbix has a solution for this.
Continue reading “Zabbix. Dynamic Indexes”