It is recommended to only allow access to trusted people when chatting with them. This can be done at firewall level. Make sure you are using the latest version from http://messenger.yahoo.com/ and there click on Get it now or Download. NOTE: In this check we only relied on the presences of the identified port. Some system are setup to act with many ghost ports open in order to trick attackers. So it is recommended that you verify the service running on the port and if you KNOW you and can verify that another service is run on the port that is not equal to what we detected please ignore this check.