Working, but not for bifrost...

firewall_ferexio_version.sh

@@ -1,6 +1,8 @@
 #!/bin/bash
 apt install ipset
 
+IP2=$(ifconfig | grep eth0 -A 1 | grep inet | awk {'print $2'})
+
 iptables -F
 iptables -t nat -F
 iptables -t mangle -F
@@ -25,6 +27,12 @@ ss -tunlp | grep LISTEN | awk {'print $5'} | sed 's/.*://' | sort | uniq > /tmp/
 for IP in $(cat /tmp/portyotwarte.txt); do iptables -A INPUT -p udp --dport $IP -j ACCEPT; done
 for IP in $(cat /tmp/portyotwarte.txt); do iptables -A INPUT -p tcp --dport $IP -j ACCEPT; done
 
+iptables -A INPUT -i lo -j ACCEPT
+iptables -A OUTPUT -o lo -j ACCEPT
+
+iptables -A INPUT -s $IP2 -j ACCEPT
+iptables -A OUTPUT -d $IP2 -j ACCEPT
+
 iptables -A INPUT -j DROP
 iptables -A FORWARD -j DROP