Hello! I accidentally wrote "ct original" instead of "ct direction original", and this broke "nft list ruleset": # nft add set filter myset '{ type ipv4_addr; }' # nft insert rule filter input ct original ip daddr @myset # nft list ruleset nft: netlink_delinearize.c:124: netlink_parse_concat_expr: Assertion `consumed > 0' failed. Abort It does seem to parse and "nft list ruleset" allows and prints back the rule if "ip daddr 1.2.3.4" is used instead. Not quite sure what is happening there. Just "ct original" on its own says "Error: syntax error, unexpected newline". Simon-