Is it effective installing firewall within same machine which offering service?

Posted by Eonil on Server Fault See other posts from Server Fault or by Eonil
Published on 2011-03-09T01:55:38Z Indexed on 2011/03/09 8:11 UTC
Read the original article Hit count: 236

Filed under:

firewall

|

configuration

I'm a starting a small service practically. And I have single server currently. No money to purchase separated/dedicated firewall equipment now.

Is it effective installing firewall software on same machine which offering internet service? My server will offer HTTP, NFS, and SSH, and custom made server software on a several ports.

(edit) All services (except NFS) should be open to internet. Not internal services. I guess my machine (virtualized within Xen) is connected to the internet directly because I can connect to my machine SSH with only IP address.

(edit) NFS is not open to internet. Sorry for my mistake. NFS will be served via SSH only.

© Server Fault or respective owner

Related posts about firewall

Managed hosting firewall vs managing own firewall

as seen on Server Fault - Search for 'Server Fault'
I posted on stackoverflow as to the overall benefits of managed hosting vs non-managed hosting. The more I think about it, it seems to boil down to one question: should I use a managed host because they take care of the firewall, or would I be okay managing my own, software firewall? The sites… >>> More
Hardware firewall vs VMWare firewall appliance

as seen on Server Fault - Search for 'Server Fault'
We have a debate in our office going on whether it's necessary to get a hardware firewall or set up a virtual one on our VMWare cluster. Our environment consists of 3 server nodes (16 cores w/ 64 GB RAM each) over 2x 1 GB switches w/ an iSCSI shared storage array. Assuming that we would be dedicating… >>> More
Firewall behind firewall

as seen on Server Fault - Search for 'Server Fault'
I've recently changed jobs and I've been set up with a new workstation. On all previous places where I've been working they've had some sort of local firewall installed on each and every workstation - but here I've been told not to activate it because it is not necessary since we're already behind… >>> More
We have no SW Firewall behind our office HW firewall, admin says its not req'd

as seen on Server Fault - Search for 'Server Fault'
I've recently changed jobs and I've been set up with a new workstation. On all previous places where I've been working they've had some sort of local firewall installed on each and every workstation - but here I've been told not to activate it because it is not necessary since we're already behind… >>> More
Can't get FTP to work on centOS 5.6

as seen on Server Fault - Search for 'Server Fault'
Hi guys I have been trying for a few hours to install and get FTP to work... I did yum install ftp and yum install vsftpd They all installed and are running but when I try to use filezilla or some other client I just can't connect....I've tried connecting on port 21 and port 990 ....nothing! These… >>> More

Related posts about configuration

SSIS Configuration error: Cannot retrieve configuration table schema

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm trying to add a simple configuration to a SSIS package, of type SQL Server, so stored in a table. At the end of the wizard, when it goes to try and write a new row to the nominated table to store the configuration it fails with the error: TITLE: Microsoft Visual Studio Could not complete wizard… >>> More
SharePoint: Can't Connect to a Configuration Database When Using Configuration Wizard

as seen on Stack Overflow - Search for 'Stack Overflow'
Hello everyone. I wonder if you could help me with the following problem: We have a SharePoint farm consisted of two servers with an NLB (a load balancer), a database server and an index server (4 servers in total). The issues initially appeared when we were trying to change Search settings via Shared… >>> More
Module configuration and layout configuration in zend framework.

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi all, I got some codes from other articles for configuring module and layout in zend framework. I tried with in my local. i didn't get different layout for default and admin module. Here is my code for configuring module and layout for zend framework. configs/application.ini [production] #… >>> More
Xml configuration versus Annotation based configuration

as seen on Stack Overflow - Search for 'Stack Overflow'
In a few large projects i have been working on lately it seems to become increasingly important to choose one or the other (XML or Annotation). As projects grow, consistency is very important for maintainability. My question is, what do people prefer. Do you prefer XML based or Annotation based… >>> More
Creating packages in code - Package Configurations

as seen on SQLIS - Search for 'SQLIS'
Continuing my theme of building various types of packages in code, this example shows how to building a package with package configurations. Incidentally it shows you how to add a variable, and a connection too. It covers the five most common configurations: Configuration File Indirect Configuration… >>> More