Solved

Basic Firewall Security Recommendations

Posted on 2011-03-03
2
347 Views
Last Modified: 2012-05-11
I need to tighten up my networks firewall policies.  I was hoping someone could post the recommended ports that need opened for a secure SMB.

I have only 4 ports I can think of that I would absolutely need to have open.  The internet (HTTP and HTTPS) and Exchange 2010 (Incoming and Outgoing SMTP SSL)

I'm sure there are allot more ports I'd like to use, such as Remote Desktop, VPN, POP3, Windows Update and ActiveSync.

Does anyone have a preconfigured list of ports to open for the average small business?
0
Comment
Question by:ND02G
2 Comments
 
LVL 39

Assisted Solution

by:Aaron Tomosky
Aaron Tomosky earned 100 total points
ID: 35033706
Start with everything locked. Open only what you need when you need it.
0
 
LVL 42

Accepted Solution

by:
kevinhsieh earned 400 total points
ID: 35034272
You will need to be able to make DNS queries to the Internet. (UDP and TCP 53 outbound). NTP to get time (UDP/53 outbound). Windows Update is http/https outbound. ActiveSync for mobile devices is 443 inbound, and you probably also want 443 inbound for OWA. ICMP echo outbound is nice, as is ICMP echo-reply inbound so you can ping.

You may or may not need to be able to FTP outbound.
0

Featured Post

Has Powershell sent you back into the Stone Age?

If managing Active Directory using Windows Powershell® is making you feel like you stepped back in time, you are not alone.  For nearly 20 years, AD admins around the world have used one tool for day-to-day AD management: Hyena. Discover why.

Question has a verified solution.

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

Lotus Notes – formerly IBM Notes – is an email client application, while IBM Domino (earlier Lotus Domino) is an email server. The client possesses a set of features that are even more advanced as compared to that of Outlook. Likewise, IBM Domino is…
How to resolve IMCEAEX NDRs in Exchange or Exchange Online related to invalid X500 addresses.
This tutorial will walk an individual through the steps necessary to install and configure the Windows Server Backup Utility. Directly connect an external storage device such as a USB drive, or CD\DVD burner: If the device is a USB drive, ensure i…
This video discusses moving either the default database or any database to a new volume.

730 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