Solved

Firewall / Router combination for publically accessable network.

Posted on 2004-04-30
2
250 Views
Last Modified: 2012-05-04
Hi,

A client of mine has requested that a firewall be placed at the doorway to his network. The internal network has a number of machines with publicly accessible IP addresses that function as web, mail and other servers.

I've done quite a bit of work with iptables and NAT and wanted some opinion on whether it would be a good idea to use only iptables to block traffic and NAT route requests to and from the servers? or is there a better or more "right" way of doing this.

The machine that is going to be used for this purpose is a new Intel P4 2.6Ghz processor with 1 Gb of DDR333 RAM holding two Intel C100 S network cards.

What sort of load would it be able to handle using my current idea of iptables and NAT, and how would it perform using an alternative solution, if there is a better way?

Since I'm asking for opinions rather than a solution, points will be given to the first answer that has me completely convinced of which direction to move in.

Thank you in advance.
0
Comment
Question by:Twitchlet
[X]
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
2 Comments
 
LVL 40

Accepted Solution

by:
jlevie earned 125 total points
ID: 10959525
First let me say that unless your client has something like a T3 or better as a network link your gateway box will be way more than adaquate for the load that a lessor speed Internet link could impose.

Iptables and a mixture of static NAT translations for the systems needing to be accessed from the Internet and dynamic NAT for all others should work fine. Of course if there are as many or more outside IP's available as there are clients you could do everything with static NAT.
0
 
LVL 1

Expert Comment

by:jscart
ID: 10972216
I have a similar setup using much 'weaker' hardware and it's been running for four years. Never had a problem. I pass quite a bit of traffic to several different hosts inside the network through NAT and run a VPN server from it.
0

Featured Post

Flexible connectivity for any environment

The KE6900 series can extend and deploy computers with high definition displays across multiple stations in a variety of applications that suit any environment. Expand computer use to stations across multiple rooms with dynamic access.

Question has a verified solution.

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

I have seen several blogs and forum entries elsewhere state that because NTFS volumes do not support linux ownership or permissions, they cannot be used for anonymous ftp upload through the vsftpd program.   IT can be done and here's how to get i…
Note: for this to work properly you need to use a Cross-Over network cable. 1. Connect both servers S1 and S2 on the second network slots respectively. Note that you can use the 1st slots but usually these would be occupied by the Service Provide…
If you're a developer or IT admin, you’re probably tasked with managing multiple websites, servers, applications, and levels of security on a daily basis. While this can be extremely time consuming, it can also be frustrating when systems aren't wor…
If you’ve ever visited a web page and noticed a cool font that you really liked the look of, but couldn’t figure out which font it was so that you could use it for your own work, then this video is for you! In this Micro Tutorial, you'll learn yo…

617 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