Re: Port 445 on System i5 520

[Nathan Andelin <nandelin@xxxxxxxxx>]

Block ports at the Firewall, of course.  Then for extra peace of mind, you can 
also use option:

4. Work with TCP/IP port restrictions

from the CFGTCP menu.

That would give you an extra layer of protection, in the event that something 
goes wrong at the Firewall, which may be just mis-communication, or something 
like that.

-Nathan.



----- Original Message ----
From: Bob Cagle <bcagle@xxxxxxxxxxx>
To: MIDRANGE-L@xxxxxxxxxxxx
Sent: Wed, July 21, 2010 9:24:41 AM
Subject: Port 445 on System i5 520

Good morning:



As I was looking through my firewall's logs this morning, I noticed
several attempts by unknown IPs to connect to port 445 of my i5.  



With some Googling, I found that port 445 is a common port for hackers
to attack on Windows systems.  What is port 445 used for?  



Is there a way to lock down a specific port on the i5 side?  I seem to
remember a screen that showed which ports were in use and for what, but
I can't seem to find it now.   (UPDATE:  I just found the screen in
Navigator that shows all the ports - it appears my only option would be
to STOP listening on port 445.  Would this break anything else though?)



I am aware of the 3rd party security applications that are available,
but I'm not really interested in a 3rd party solution.  I could just as
easily block port 445 at the firewall, but I want to make sure that I'm
not breaking anything by doing so.



Thanks



Bob Cagle

IT Manager

Lynk, Inc.