I just changed security programs on my PC and am now having trouble sharing my hard drive with my Mac's, an eMac and a PPC MacMini. In the past, I have had no problems connecting using smb://192.168.2.9. Now, I cannot connect unless I check on the PC ALLOW ALL TRAFFIC. I can then uncheck allow all traffic and continue to be connected and read and write files to the shard drive. I tried opening TCP and UDP on ports 139 and 445, but, this still does not help. The security suite my ISP uses is from F-Secure. I'm thinking that this is going to involve a rule of some sort, but, when I use the logging function on the PC, each time I try to Connect to Server on the Mac, it originates from a different port on the Mac to the PC. It is always trying to connect to 445 on the PC. I also get a message popup on the PC from the security suite saying that the traffic has been ALLOWED. That is the part that is stumping me. In every case, it says it has allowed the traffic, but, the Mac reports that "some data could not be read or written." This was not a problem until I installed the security suite. I have the sharing set up to allow network users to change my files, so it cannot be that aspect of things. Any help would be appreciated.