Hi i want to limit only file sharing for computer in my home that is connected through lan. I dont want wireless access to the shared files, even if its on my network to access my shared files. How can i do that? i have an actiontec wireless G verizon router. must i configured my router or my computer? If so can you show me the steps. or is there any links to do what i want to do. thanks in advance.

For the most part wireless and wired are no different. The normal ways are to secure the system by requiring the strongest security to access the files. You further secure or disable the wireless to help prevent unwanted access. Many of the simple solutions could be defeated so they really are not what could be termed secure. Things like mac or ip can be spoofed. An advanced router might be able to be configured to prevent smb traffic but I would doubt that 99% out there could allow independent media selections. I read it wrong and answer it wrong too. So get off my case you peanut.

OK first things first. You have the idea that because you have wireless someone can access your pcs files. This is true to a certain extent. You want to protect yourself from ALL outside intrusions. Don't think just about your flanks but keep an eye on the main front. Depending on location a drive by hacker with a laptop could be an extremely remote possiblity. Go thru your wireless routers manual and follow the instructions to secure your wireless [no broadcast ssid, best level of level of encryption your WORKSTATIONS support, etc] Read how to do ip reservations or mac filtering [same thing different terms] so you confine a ip address to a particular pc on your network nic's mac [ethernet] address. You can go a step further. Use and configure the windows firewall or use Zonealarm [a free download]. With it you can block any pc on your network from accessing your pc. Last but not least is share security. Make your share permissions specific. Assign the exact pc and user account to the share you want and remove or disable everyone else [except yourself of course. Don't play with TOO secure or you can screw yourself out of the system - simple is better] You can even then have finer granularity with ntfs file permissions. But the fact is if they got this far, these permissions are null and void. Are you ready for where Microsoft wants you to go today?

To add to what Wanderer said about share permissions, I always like to explicitly DENY permissions to anyone that does not need access. Remember though, that deny always overrides any other permission. "Computer security." — Oxymoron