well those ports belong to netbios which is a very vunlerable protocol so if you plan on implementing this on your WAN or whatever you might want to look into some kind of tunneling e.g IPSEC e.t.c to make it secure.
-----Original Message----- From: Thomas Ullrich [mailto:[EMAIL PROTECTED]] Sent: Wednesday, November 21, 2001 10:54 AM To: Security-basics Subject: Win Network Fileshares Often users in different locations of our company (e.g. a user in the US and a user in Belgium) want to use network filesharing via the mapping functionality of Windows' file-explorer. I think the ports 137 to 139 must be opened on the FW for this. But usually I try to convince my users that they should not use this mechanisms on our WAN. Does anybody has security related arguments for me to turn those requests down. Thomas
