File transfer on different subnet or router

hi

i successfully install and configure openfire and spark im client.

i am having issue with spark im i am using two different subnet like

10.71.101.1 and 10.71.101.161 subnet.

connecting spark im on differ subnet via advance setting and put host ip manually.

its working only for chat but not showing online and not sending file over different subnet.

tell me what is the configuration to change for show online and file transfer over different subnet.

Openfire, Version: 4.1.4

spark 2.7.7

thanks

Your best bet is to force the transfer to use in-band, which will be slower, but more likely to work. Upcoming Spark release will have such a feature. SPARK-2015