New to the forum. I had a very concerning experience wanted to get some advice. I just loaded Tightvnc this weekend and was testing it. Had to open ports 5800 and 5900 on my Linksys WRT54G router to allow access to test it. I also turned on logs for the first time. Today I went into the log and saw a half dozen incoming IP's with destination ports of 5900, a couple I recognize as my access but the others I don't recognize. I only turn on the VNC server when I intend to allow access. And just now I disabled the ports again. I was planning on using VNC to help my mother on her computer and she also has a WRT54G at her end with the same ports open. How insecure is this???