Port Description:
137: This port is used to request NetBios names to IP addresses up. For example, someone shouted, "123 computers to share your C drive under
ABC.doc this file IP address is how much." So this cry is broadcast, only the IP address of the answer 123.
138: The port is your view [Network Neighborhood] use of. You have the network computer called master browser computer maintains a shared column
table. So the port closure will not pass [Network Neighborhood] to view other computers myself. Of course not interfere with each other
communication.
139,445: Communication computer to get each other's IP address, it will use 139 or 445 port to start communicating. If not a domain environment
, it is to call 139 SMB port communications. If a domain environment, CIFS is call 445 communications port. If you do not want other
people to access your file it, put the two closed out.
Major domestic carriers are not risk averse XX, generally closed mapping of external port 80, but the remaining ports are left open.
The light cat to Internet addresses and the bridge (to be telephone operators, so that the background modification), dial-up router supports NAT and DDNS of TP and so on.
Then configure the router DDNS Dynamic binding domain (recommended oray or 3322), configured on the port of NAT.
On the Internet can be accessed by external resources "\\ domain name."
