Архивы Linux - Page 32 of 59

Restricting access to cPanel by IP

In cPanel, you can enable question control for unknown IP addresses.
After entering the correct username and password, 4 questions will be asked.

Install and configure tftpd-hpa

I will give an example of installing a tftpd server tftpd-hpa.

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.

How to change “open files” in Linux

I will give an example of viewing and increasing the value of “open files” in Linux.

Moving ABillS to another server

On the test I will transfer the ABillS billing system from one server to another.

Configuring L4-Redirect-ipset for Accel-ipoe and ABillS

In order to authorize clients with a negative balance Accel-ppp to add IP addresses to the ipset list, add the following to its configuration, in the ipoe section:

Solution «TX driver issue detected, PF reset issued»

Once on one high-load access server with about 5 Gb/s traffic in /var/log/syslog, errors began to appear frequently:

How to transfer a file via XMODEM using Minicom

Run minicom and first connect to the device, execute the command to transfer/receive the file. It is also desirable to specify the data transfer rate of 115200 before the transfer to the device and in minicom to speed up the process otherwise if the speed is 9600, you will have to wait a long time. In minicom, the speed is selected by pressing Ctrl+A O and selecting “setting the serial port”, then the “E” key and again “E”.