Firewall
Zurück zu OPSI
vim /etc/sysconfig/iptables
*nat :PREROUTING ACCEPT [0:0] :INPUT ACCEPT [0:0] :OUTPUT ACCEPT [0:0] :POSTROUTING ACCEPT [0:0] -A POSTROUTING -o enp3s0 -j MASQUERADE COMMIT *filter :INPUT DROP [0:0] :FORWARD DROP [0:0] :OUTPUT ACCEPT [401:43511] # lo -A INPUT -i lo -j ACCEPT -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT -A INPUT -p icmp -j ACCEPT # INPUT VPN Regeln ## ssh -A INPUT -p tcp -i nc-schule -m state --state NEW -m tcp --dport 22 -j ACCEPT ## OPSI-Frontend -A INPUT -p tcp -i nc-schule -m state --state NEW -m tcp --dport 443 -j ACCEPT -A INPUT -p tcp -i nc-schule -m state --state NEW -m tcp --dport 4447 -j ACCEPT # INPUT enp2s0 (OPSI-Netzwerk) ## ssh -A INPUT -p tcp -i enp2s0 -m state --state NEW -m tcp --dport 22 -j ACCEPT ## DHCP -A INPUT -p udp -i enp2s0 -m state --state NEW -m udp --dport 67 -j ACCEPT ## xinet -A INPUT -p udp -i enp2s0 -m state --state NEW -m udp --dport 69 -j ACCEPT ## DNS-Server -A INPUT -p tcp -i enp2s0 -m state --state NEW -m tcp --dport 53 -j ACCEPT -A INPUT -p udp -i enp2s0 -m state --state NEW -m udp --dport 53 -j ACCEPT ## OPSI-Frontend -A INPUT -p tcp -i enp2s0 -m state --state NEW -m tcp --dport 443 -j ACCEPT -A INPUT -p tcp -i enp2s0 -m state --state NEW -m tcp --dport 4447 -j ACCEPT ## Samba NT4 Style -A INPUT -p tcp -i enp2s0 -m state --state NEW -m tcp --dport 135 -j ACCEPT -A INPUT -p tcp -i enp2s0 -m state --state NEW -m tcp --dport 139 -j ACCEPT -A INPUT -p tcp -i enp2s0 -m state --state NEW -m tcp --dport 445 -j ACCEPT -A INPUT -p udp -i enp2s0 -m state --state NEW -m udp --dport 137 -j ACCEPT -A INPUT -p udp -i enp2s0 -m state --state NEW -m udp --dport 138 -j ACCEPT # ICMP Zusätze -A INPUT -j REJECT --reject-with icmp-host-prohibited # Forward -A FORWARD -i enp2s0 -j ACCEPT -A FORWARD -o enp2s0 -m state --state RELATED,ESTABLISHED -j ACCEPT -A FORWARD -j REJECT --reject-with icmp-host-prohibited COMMIT
