This is the blog of Ronald Bartels that wanders on and off the subject of problem management (that is how it started). Mostly now the topics are about IoT and SD-WAN.
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Firewalls are becoming increasingly important in today’s world. Hackers and automated scripts are constantly trying to invade your system and use it for Bitcoin mining, botnets or other things. To prevent these attacks, you can use a firewall on your system. IPTables is the strongest firewall in Linux because it can filter packets in the kernel before they reach the application. Using IPTables is not very easy for Linux beginners. We have created easywall - the simple IPTables web interface . The focus of the software is on easy installation and use. Access this neat software over on github: easywall
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#!/bin/bash # # usage updatethreatblock.sh <configuration file> # eg: updatethreatblock.sh /etc/ipset-threatblock/ipset-threatblock.conf # function exists() { command -v "$1" >/dev/null 2>&1 ; } if [[ -z "$1" ]]; then echo "Error: please specify a configuration file, e.g. $0 /etc/ipset-threatblock/ipset-threatblock.conf" exit 1 fi # shellcheck source=ipset-threatblock.conf if ! source "$1"; then echo "Error: can't load configuration file $1" exit 1 fi if ! exists curl && exists egrep && exists grep && exists ipset && exists iptables && exists sed && exists sort && exists wc ; then echo >&2 "Error: searching PATH fails to find executables among: curl egrep grep ipset iptables sed sort wc" exit 1 fi DO_OPTIMIZE_CIDR=no if exists iprange && [[ ${OPTIMIZE_CIDR:-yes} != no ]]; then DO_OPTIMIZE_CIDR=yes fi if [[ ! -d $(dirname &q
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