Doesn't apply POSTROUTING from custom rules

[Akantor47]

Hello Tried to apply some nat rules with pre and post routing.

Only the prerouting gets applied to the iptables

EXAMPLE:

-A FORWARD -o virbr0 -d 192.168.122.200 -j ACCEPT
-t nat -A PREROUTING -p tcp --dport 63333 -j DNAT --to 192.168.122.200:64738
-t nat -A POSTROUTING -j MASQUERADE
-t nat -A POSTROUTING -s 192.168.122.0/24 -j MASQUERADE
-t nat -A POSTROUTING -s 10.8.0.0/24 -o virbr0 -j MASQUERADE

This only applyes the forward and prerouting from the custom rules section.

Can somebody help or would it be possible to add multiple custom rules to different points of the iptable generation?

Maybe they get overwriten by other rules which I can't see.

Thanks for the help.