iptables-translate -A PREROUTING -m realm --realm 4
nft 'add rule ip filter PREROUTING rtclassid 0x4 counter'

iptables-translate -A PREROUTING -m realm --realm 5/5
nft 'add rule ip filter PREROUTING rtclassid and 0x5 == 0x5 counter'

iptables-translate -A PREROUTING -m realm ! --realm 50
nft 'add rule ip filter PREROUTING rtclassid != 0x32 counter'

iptables-translate -A INPUT -m realm --realm 1/0xf
nft 'add rule ip filter INPUT rtclassid and 0xf == 0x1 counter'