FAQ page http://www.wuala.com/en/support/faq/c/19
states that

Which ports are used by Wuala?
UDP: none
TCP: 80, 443, 38088
Note: It is sufficient if one port of them is open

But whatever I try using this information doen’t give any resullt :frowning:

Note it seems Wuala ports and protocole have evolved over time (threads posted a couple of years ago mention for instance UDP rules).

Philippe