tor port (tor-orport) 9100 seems to be filtered by a transparent proxy.
This is the list of port which seems to be filtered :
PORT STATE SERVICE
161/tcp filtered snmp
2001/tcp filtered dc
6001/tcp filtered X11:1
9001/tcp filtered tor-orport
I have test nmap because tor application for my mobile doesn't work correctly on 3G but work well when connecting on my home wifi.