Mark match an Tarpit failure

["Don Hughes" <support@xxxxxxxxxxxx>]

The following work for me:

iptables -A INPUT -m mark --mark 13 -j DROP
iptables -A INPUT -p tcp -j TARPIT

but the following does not and returns "Invalid 
Argument":

iptables -A INPUT -m mark --mark 13 -j TARPIT

what am I missing?

..don

support@xxxxxxxxxxxxxxxxxxx
White Plains, NY