Vyacheslav

D-Link DES-1210-28/ME firmware update

On the test, I will use the D-Link DES-1210-28/ME rev.B2 switch with firmware 6.07.B002.

How to make a bootable USB flash drive with Kubuntu

To make a bootable USB flash drive with Kubuntu perform several actions:

D-Link DIR-615 firmware update

For example, I will update D-Link DIR-615 with the old firmware 1.0.19 to version 2.5.4.

View information about ONU on Huawei SmartAX MA5600

To view information about the ONU / ONT, connect to Huawei SmartAX MA5683T via telnet using the putty utility or via the windows command line, for example, by typing the command:

Restore Huawei SmartAX MA5600 Configuration

On the test, I will give an example of creating a backup of the Huawei SmartAX MA5683T configuration to a TFTP server, as well as its restoration.
Recovery is often useful when you need to quickly return to the previous configuration or to make massive changes to the configuration or to profiles that are active and used by the ONT.
OLT reboot is required.

Accel-ppp debug

I will give an example of accel-ppp build with debugging information support, for example, in order to find out the cause of the crash.

How to detect DDOS attacks

I will give examples of viewing the number of active compounds:

The script against DDOS attacks

I will give an example of a simple script against DDOS attacks for NAT servers.
The script is executed when the total number of “conntrack” connections is more than 500000, it saves to the text file the IP address which has the most “conntrack” connections, who has more than 10,000 – adds to the ipset list.

TP-Link TL-WR340G Firmware Update

First, check the hardware version of the device, it is indicated on the label under the router. Upgrading the firmware from the wrong version of the device can spoil it! You can not update the firmware via Wi-Fi and turn off the power of the router during the firmware!

How to change open_files_limit in MySQL

I will give an example of viewing and increasing the open_files_limit parameter in MySQL.
Will perform operations in the Ubuntu Server 16.04.