if your openfire server is behind NAT ?

hi all,

In jitsi's own videobridge project,https://docs.google.com/document/d/1iMOvIFBDSPSkL1_dfhND_mXvf3luIex9hepeIpTuLkw/ pub,    you can edit the file "~/.sip-communicator/sip-communicator.properties ".This config can help these servers behind NAT.

and  the openfire 's jitsi videoBridge plugin folder also has a file name "sip-communicator.properties", but it is not work. The log shows as follow:

net.java.sip.communicator.service.protocol.OperationFailedException:Could not establish connection (ICE failed)

how can i let it work?

Kelvin