I have only one ip address and so I get to my jail through NAT. SSH to the host is lightning-fast but SSH to the jail is awfully long... Like 20 seconds between ssh command and prompt for public key password :-s
In pf.conf :
rdr pass log (all) on $ext_if proto tcp to port $jail_ssh -> $jail_ip port ssh
pass log (all) quick on $ext_if proto tcp to port $host_ssh
Tcp dumps are the same except the 20 seconds time gap... sshd configs are equal..!