antoniocampos

#Depending on version one of the following files must exist

root@host:/ nano /etc/fail2ban/action.d/iptables-blocktype.conf

or 

root@host:/ nano /etc/fail2ban/action.d/iptables-common.conf


comment the line

xterat

Enable bbr on Ubuntu 16.04

1. Make sure kernel version is 4.9 or newer:

   uname -r

   Install Hardware Enablement Stack (HWE) to update kernel automaticly:

cbeuw

#!/usr/bin/env bash

# Forked and modified by cbeuw from https://github.com/teddysun/shadowsocks_install/blob/master/shadowsocks-all.sh

red='\033[0;31m'
green='\033[0;32m'
yellow='\033[0;33m'
plain='\033[0m'

[[ $EUID -ne 0 ]] && echo -e "[${red}Error${plain}] This script must be run as root!" && exit 1

brunneis

Proxmox Virtual Environment 6.1-3 / Debian 10 (buster)
Kernel 5.3.10-1-pve
Ethernet controller: Intel Corporation Ethernet Connection (2) I218-V (rev 05)
Ethernet driver: e1000e 3.2.6-k
Ethernet firmware: 0.1-4

The solution I've found was to create a oneshot service which disables segmentation offloading.