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05.05.2004 at 05:22AM PDT, ID: 20978623
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6.8

Setting up a Linux Firewall, file server, and dhcp server

Asked by mattmc97 in Linux Network Security

Tags: , , ,

Hello all.

I have a windows 2000 server that acts as a DHCP server, file server, DNS server, VPN server, and runs exchange for email. Well, it got the worm this weekend and had our web access and email down for two days while we got everything all cleaned off it.

What I would like to do is to build a redundant machine using linux so if I were to get a virus again, I could just switch to the linux machine and have everyone back up in a few minutes.

I had already implemented Postfix as an email filter which passes the filtered email to exchange for delivery, so I can modify that to do local delivery.

My questions are as follows:

1. Is there a good linux firewall that I could put in place permanently that would help keep hackers and virus out to begin with or would you recommend a router with a firewall built in as a better alternative connected behind my cisco (we currently have a cisco 2611 router)?

2. Would this firewall verify my VPN connections for me or would I have to allow passthrough to my win2000 server?

3. Finally, if I wanted to setup this machine or another machine as a backup windows file server using Samba, is there a way to block access to the outside world (not counting unplugging the network cable!) except for daily/weekly backups of my win2000 server and then if the win2000 server goes down I could make it available to the network?

Program names and URLs to any guides would be greatly appreciated!

thanks.

mattmcStart Free Trial
 
Keywords: Setting up a Linux Firewall, file server…
Title
1 Good Firewal Software
2 DHCP Across Hardware Site to Site VPN
3 cisco vpn client - proxy
4 cisco vpn connection
5 VPN/DHCP
6 DHCP statistic on cisco
 
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[+][-]05.05.2004 at 08:45AM PDT, ID: 10997193

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Zone: Linux Network Security
Tags: linux, firewall, server, dhcp
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Solution Provided By: oumer
Participating Experts: 5
Solution Grade: A
 
 
[+][-]05.05.2004 at 01:48PM PDT, ID: 10999869

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[+][-]05.12.2004 at 01:26PM PDT, ID: 11053606

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