The Jitsi SIP account failed to connect to SIP server over VPN connection,
with error "connection failed to SIP server". The SIP server's IP address
and port are open from client's side, firewall is turned off too.
The SIP server does not use NAT, other SIP software like Linphone works
perfectly with this SIP account via VPN connection.
Also no any informative errors in Jitsi log.
Any ideas on this issue?