Salam fahed,
Without doing anything your clients should be able to log to the webserver, you can even make it simpler to your clients by letting them enter forexample
http://myserver.com by adding the following
/ip dns static
add address=10.0.0.153 disabled=no name="myserver.com" ttl=1d
and for the second part I think you mean that you want your clients to connect without limitation which can be done by this rule
/queue simple
add comment="" direction=both disabled=no dst-address=10.0.0.153/32 \
interface=all limit-at=0/0 max-limit=0/0 name="Webserver" parent=none \
priority=8 queue=default-small/default-small target-addresses=0.0.0.0/0 \
total-queue=default-small
regards,
Khaled