I will give an example of quickly setting up a range of ports on Huawei S2300 series switches; for example, I will perform the settings on Huawei Quidway S2326TP-EI.
Continue reading “Quickly set up a range of ports on Huawei S2300”BDCOM. Restricting access to the web interface
I’ll give an example of how to allow connections to the BDCOM OLT web interface only from specified IP addresses; in a similar way, you can limit other traffic to the OLT, as well as traffic passing to users through the OLT.
Continue reading “BDCOM. Restricting access to the web interface”BDCOM. Adding a user with limited rights
One day I needed operators to be able to open the BDCOM OLT web interface, so I created a user with read-only access for them.
Continue reading “BDCOM. Adding a user with limited rights”Setting up logs on Cisco Nexus
In this article I will give an example of setting up logs on Cisco Nexus switches.
Continue reading “Setting up logs on Cisco Nexus”Solution Unable to retrieve PJSIP transport in Asterisk
The error “Unable to retrieve PJSIP transport …” occurs when TRANSPORT does not exist or is specified incorrectly.
Continue reading “Solution Unable to retrieve PJSIP transport in Asterisk”DSE7420MK2 ethernet port does not work after a thunderstorm
One day, after a thunderstorm, the Ethernet port in the DSE7420MK2 generator control module stopped working. The link appeared and disappeared, but at a distance of 10m the device was not accessible. If you connect with a short 1m cable, then sometimes it was available.
Continue reading “DSE7420MK2 ethernet port does not work after a thunderstorm”Zabbix ERROR 1273 (HY000) at line 483: Unknown collation: ‘utf8mb4_unicode_ci’
One day I was migrating a Zabbix server database to another server and an error occurred:
Continue reading “Zabbix ERROR 1273 (HY000) at line 483: Unknown collation: ‘utf8mb4_unicode_ci’”Setting up nftables
In this article I will give examples of setting up nftables to replace the outdated iptables.
Continue reading “Setting up nftables”Monitoring mdadm in Zabbix
I will give an example of simple monitoring of a mdadm software raid in Zabbix.
Continue reading “Monitoring mdadm in Zabbix”Solution for heavy CPU load MikroTik CRS106-1C-5S
One day I was asked to look at MikroTik CRS106-1C-5S, whose users could not use the Internet normally, there was no speed and ping requests dropped out. When I looked at CPU utilization, it was almost 100% (in the menu System – Resources).
Continue reading “Solution for heavy CPU load MikroTik CRS106-1C-5S”