*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
-P FORWARD ACCEPT
COMMIT
*nat
:PREROUTING ACCEPT [0:0]
:INPUT ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
:POSTROUTING ACCEPT [0:0]
# Kreia is a client; Leibniz and Ferma are servers; port 1337 ; IP 5.7.1.42.
-A PREROUTING -i enp0s3 -p udp -d 5.7.1.42 -s 5.7.1.2 -j DNAT --to-destination 5.7.1.5
-A POSTROUTING -o enp0s3 -p udp -d 5.7.1.2 -s 5.7.1.5 -j SNAT --to-source 5.7.1.42
-A POSTROUTING -o enp0s3 -p udp -d 5.7.1.2 -s 5.7.1.4 -j SNAT --to-source 5.7.1.42
COMMIT
*mangle
:PREROUTING ACCEPT [0:0]
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
:POSTROUTING ACCEPT [0:0]
-A PREROUTING -i enp0s3 -p udp -s 5.7.1.2 -d 5.7.1.42 -j TEE --gateway 5.7.1.4
COMMIT