npfruledel <netifname> <input | output> <rule sequence num>

[root@sylixos:/root]# help npfruledel     
delete a rule from net packet filter.
npfruledel [netifname] [input | output] [rule sequence num]
[root@sylixos:/root]# 

[root@sylixos_station:/root]# npfruledel en1 input 0
[root@sylixos_station:/root]# npfs
input >>

NETIF ATTACH SEONUM RULE ALLOW MAC                       IPs                IPe                PORTs        PORTe

output >>

NETIF ATTACH SEONUM RULE ALLOW MAC                       IPs                IPe                PORTs        PORTe

drop: 0 allow: 0