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#1
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File and Printer Sharing Ports
I noticed that opening either TCP Port 139 or 445 will allow me to provide
file sharing. So, what is the difference between the two ports? Why does Windows Firewall exception for File and Printer Sharing open both ports (as well as UDP Ports 137 and 138)? What is each of these ports typically used for in Windows? Thanks |
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#2
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File and Printer Sharing Ports
Hi:
Ports 137, 138, 139 and 445 are for file and print sharing coincidently. 137 is also used for Backup Exec 445 is also for Brightstor ARCserve Backup 137, 139 and 445 are also used for WinMessenger How to Open Ports in the Windows XP Internet Connection Firewall http://www.microsoft.com/athome/secu...ect/ports.mspx --------------Original Message------------- "John" escribió en el mensaje ... I noticed that opening either TCP Port 139 or 445 will allow me to provide file sharing. So, what is the difference between the two ports? Why does Windows Firewall exception for File and Printer Sharing open both ports (as well as UDP Ports 137 and 138)? What is each of these ports typically used for in Windows? Thanks |
#3
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File and Printer Sharing Ports
Thanks for your reply, Juan. I've actually gone to that web site previously
and am unclear on the difference between the function of port 139 and port 445. Basically, I am trying to open as few ports as possible and would like to know when 139 would be used and when 445 would be used. Thanks "Juan" wrote: Hi: Ports 137, 138, 139 and 445 are for file and print sharing coincidently. 137 is also used for Backup Exec 445 is also for Brightstor ARCserve Backup 137, 139 and 445 are also used for WinMessenger How to Open Ports in the Windows XP Internet Connection Firewall http://www.microsoft.com/athome/secu...ect/ports.mspx --------------Original Message------------- "John" escribió en el mensaje ... I noticed that opening either TCP Port 139 or 445 will allow me to provide file sharing. So, what is the difference between the two ports? Why does Windows Firewall exception for File and Printer Sharing open both ports (as well as UDP Ports 137 and 138)? What is each of these ports typically used for in Windows? Thanks |
#4
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File and Printer Sharing Ports
Hi John:
I suppose it's the same as with other programs; they use one port for outgoing data and another for incomming. one example is Outlook Express; for outgoing Hotmail messages it uses port 25... and port 995 for incomming. The only sure way to know which ports a specific program uses, is with the use of specialized software like the one in the following link. The Software Publisher's Description reads: From the developer: "Active Ports - easy to use tool for Windows NT/2000/XP that enables you to monitor all open TCP/IP and UDP ports on the local computer. Active Ports maps ports to the owning application so you can watch which process has opened which port. It also displays a local and remote IP address for each connection and allows you to terminate the owning process. Active Ports can help you to detect trojans and other malicious programs." Download Active Ports 1.4 from; http://www.download.com/Active-Ports...ml?tag=lst-0-1 Publisher's website. http://www.protect-me.com/freeware.html --------------Original Message------------------- "John" escribió en el mensaje ... Thanks for your reply, Juan. I've actually gone to that web site previously and am unclear on the difference between the function of port 139 and port 445. Basically, I am trying to open as few ports as possible and would like to know when 139 would be used and when 445 would be used. Thanks "Juan" wrote: Hi: Ports 137, 138, 139 and 445 are for file and print sharing coincidently. 137 is also used for Backup Exec 445 is also for Brightstor ARCserve Backup 137, 139 and 445 are also used for WinMessenger How to Open Ports in the Windows XP Internet Connection Firewall http://www.microsoft.com/athome/secu...ect/ports.mspx --------------Original Message------------- "John" escribió en el mensaje ... I noticed that opening either TCP Port 139 or 445 will allow me to provide file sharing. So, what is the difference between the two ports? Why does Windows Firewall exception for File and Printer Sharing open both ports (as well as UDP Ports 137 and 138)? What is each of these ports typically used for in Windows? Thanks |
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