Kermit Proxy

It is a service that provides the ability to use a proxy server. It provides connection data (IP address and port number) as well as remote equipment that acts as a "gateway" for transferring traffic.

Fail2Ban is a security tool that analyzes log files for malicious patterns and bans IP addresses that show suspicious activity. Although Fail2Ban is primarily designed to work with TCP-based protocols like SSH, HTTP, and MySQL, it can be configured to work with UDP-based protocols, including UDP flood attacks.

To use Fail2Ban to protect your server from UDP flood attacks, follow these steps:

1. Install Fail2Ban:

sudo apt-get update
sudo apt-get install fail2ban

2. Create a custom UDP log file:

Create a log file to store the UDP flood attack data. This log file should be located in the /var/log/ directory, and it should have the appropriate permissions. For example, you can create a log file named udp-flood.log:

sudo touch /var/log/udp-flood.log
sudo chown syslog:adm /var/log/udp-flood.log
sudo chmod 640 /var/log/udp-flood.log

3. Configure Fail2Ban to monitor the UDP log file:

Create a new filter file for UDP flood attacks, for example, /etc/fail2ban/filter.d/udp-flood.conf:

[Definition]
failregex = ^.*UDP.*Flood.*
ignoreregex =

Replace HOST with the actual hostname or IP address of your server, and with the IP address of the attacking host.

Next, create a new action file for UDP flood attacks, for example, /etc/fail2ban/action.d/udp-flood.conf:

[Definition]
actionstart =
actionstop =
actioncheck =
actionban = iptables -I INPUT -s  -j DROP; iptables-save
actionunban = iptables -D INPUT -s  -j DROP; iptables-save

Replace IP with the IP address of the banned host.

Finally, create a new jail configuration file for UDP flood attacks, for example, /etc/fail2ban/jail.d/udp-flood.local.conf:

[udp-flood]
enabled = true
port = 
logpath = /var/log/udp-flood.log
maxretry = 3
findtime = 300
bantime = 1800
action = udp-flood

Replace UDP_PORT with the UDP port you want to monitor.

Reload Fail2Ban configuration:

sudo systemctl reload fail2ban

To send traffic through a proxy, you need to configure your device or application to use the proxy server's address and port. The process for setting up a proxy varies depending on the device or application you're using.

It means organizing a connection through several VPN-servers at once. It is used to protect confidential data as much as possible or to hide one's real IP address. This principle of connection is used, for example, in the TOR-browser. That is, when all traffic is sent immediately through a chain of proxy servers.

In Windows 8 and later editions it is recommended to setup network proxy through Group Policy. To do this, run GPMC.msc (via "Run" or enter in the "Search"), then select the section with the users, from the list of parameters select "Internet Settings". Further settings are not different from the standard ones in Windows. You can set proxy, specify the start page, enter restrictions and so on.