Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people, just like you, are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
Solved

Firewall Help - List of Ports I should close.

Posted on 2004-10-12
4
144 Views
Last Modified: 2013-11-16
Can anyone tell me if a list of firewall ports that you should always close ?  My ports are currently marked as stelth which I assume is not the same thing.
0
Comment
Question by:Northumberland
  • 2
4 Comments
 
LVL 70

Accepted Solution

by:
Chris Dent earned 500 total points
ID: 12285410

Stealth is better than Closed - it won't even admit the port exists that way.

Still, it is better to Stealth or Close everything inbound unless you specifically need it open.
0
 
LVL 1

Expert Comment

by:WanMan
ID: 12285674
What Chris said.

I would set the firewall to stop ALL ports by default and then only open up the ports you need.

Under normal circumstances, unless you are hosting services inside your firewall then you don't need to allow ANY traffic inbound, except in response to a request from inside.
0
 
LVL 11

Expert Comment

by:PennGwyn
ID: 12288093
Both correct.  Trying to "block all bad ports" is an unrewarding lifetime career.  The only sane approach is to block everything by default, and then open the things you actually need.

0
 
LVL 1

Expert Comment

by:WanMan
ID: 12296727
" Trying to "block all bad ports" is an unrewarding lifetime career. "  What a good way of putting it! May I quote you (anonymously)?
0

Featured Post

Netscaler Common Configuration How To guides

If you use NetScaler you will want to see these guides. The NetScaler How To Guides show administrators how to get NetScaler up and configured by providing instructions for common scenarios and some not so common ones.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

PRTG Network Monitor lets you monitor your bandwidth usage, so you know who is using up your bandwidth, and what they're using it for.
I had an issue with InstallShield not being able to use Computer Browser service on Windows Server 2012. Here is the solution I found.
Get a first impression of how PRTG looks and learn how it works.   This video is a short introduction to PRTG, as an initial overview or as a quick start for new PRTG users.
Here's a very brief overview of the methods PRTG Network Monitor (https://www.paessler.com/prtg) offers for monitoring bandwidth, to help you decide which methods you´d like to investigate in more detail.  The methods are covered in more detail in o…

789 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question