vi /etc/network/interfaces
source /etc/network/interfaces.d/*
auto lo iface lo inet loopback
auto ens3 iface ens3 inet static address 10.1.8.14 network 10.1.8.0 netmask 255.255.255.0 gateway 10.1.8.1
dns-nameservers 10.1.8.14 dns-search cesal.cz
pre-up iptables-restore < /etc/iptables.rules
vi /etc/iptables.rules
# IPTables rules
*filter :INPUT ACCEPT [0:0] :FORWARD ACCEPT [0:0] :OUTPUT ACCEPT [0:0]
-A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT -A INPUT -i lo -j ACCEPT -A INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT
-A INPUT -p icmp --icmp-type 8 -s 0/0 -m state --state NEW,ESTABLISHED,RELATED -j ACCEPT -A OUTPUT -p icmp --icmp-type 0 -d 0/0 -m state --state ESTABLISHED,RELATED -j ACCEPT
-A INPUT -m state --state NEW -p tcp -m tcp --dport 53 -j ACCEPT -A INPUT -m state --state NEW -p udp -m udp --dport 53 -j ACCEPT -A INPUT -m state --state NEW -p tcp -m tcp --dport 54 -j ACCEPT -A INPUT -m state --state NEW -p udp -m udp --dport 54 -j ACCEPT
-A INPUT -j DROP -A FORWARD -j DROP COMMIT
*nat :PREROUTING ACCEPT [0:0] :INPUT ACCEPT [0:0] :OUTPUT ACCEPT [0:0] :POSTROUTING ACCEPT [0:0]
# -A PREROUTING -p tcp -s 10.0.0.0/8 --dport 53 -j REDIRECT --to-port 54 # -A PREROUTING -p udp -s 10.0.0.0/8 --dport 53 -j REDIRECT --to-port 54
COMMIT
