Greetings We hav setup BBB with Freeswitch We have problems with sound errors We get 1006 timeout errors Our setup is as follows I have change the firewall NAT Rule Like below iptables -t nat -A PREROUTING -i $fwan -d (Public IP) -p tcp -m multiport --dports 5066,7443 -j DNAT --to 192.168.1.130 iptables -t nat -A PREROUTING -i $fwan -d (Public IP) -p udp -m multiport --dports 16384:32768 -j DNAT --to 192.168.1.130 firewall NAT Prerouting test : external pc : netcat external_ip 5066 hello bigbluebutton server: netcat -l 5066 hello netcat test is ok. but still system has 1006 timeout error in /opt/freeswitch/log/freeswitch.log 2020-06-03 09:50:35.120445 [DEBUG] mod_verto.c:4271 192.168.1.5:35990 Client Connect from 192.168.1.5:35990 accepted 2020-06-03 09:50:35.120445 [DEBUG] mod_verto.c:2019 192.168.1.5:35990 Starting client thread. 2020-06-03 09:50:35.120445 [NOTICE] mod_verto.c:1875 192.168.1.5:35990 WS SETUP FAILED 2020-06-03 09:50:35.120445 [DEBUG] mod_verto.c:2046 192.168.1.5:35990 Ending client thread. 2020-06-03 09:50:35.120445 [DEBUG] mod_verto.c:2054 192.168.1.5:35990 Thread ended Please help with what we have done wrong Mettavihari