UDP: port 31790 -> 31789

["Jan Stifter" <j.stifter () medres ch>]

hello all,
our firewall logs a lot of packets, coming in from port 31790 to port 31789,
udp protocol. it seems to be a quite usual scan attack. has anybody
encountered anything equal or can anybody explain to me, what kind of
software the possible attacker is expecting at port 31789?

any hints are greatly appreciated

jan stifter
medres ag