IPTABLES was replaced by NFTABLES in Qubes 4.2.
Maybe thats the problem, so you maybe needs to covert the IPTABLES rules to NFTABLES ones for Qubes 4.2?
See additionally Moving from iptables to nftables - nftables wiki
IPTABLES was replaced by NFTABLES in Qubes 4.2.
Maybe thats the problem, so you maybe needs to covert the IPTABLES rules to NFTABLES ones for Qubes 4.2?
See additionally Moving from iptables to nftables - nftables wiki