accept - Accept the packet. It is not passed to the next firewall rule.
add-dst-to-address-list - Add destination address to address list specified by address-list parameter
add-src-to-address-list - Add source address to address list specified by address-list parameter
drop -Silently drop the packet.
jump - Jump to the user defined chain specified by the value of jump-target parameter
log - Add a message to the system log containing following data: in-interface, out-interface, src-mac, protocol, src-ip:port->dst-ip:port and length of the packet. After packet is matched it is passed to the next rule in the list, similar as passthrough
passthrough - Ignore this rule and go to next one (useful for statistics).
reject - Drop the packet and send an ICMP reject message
return - Passes control back to the chain from where the jump took place.
