Security Basics mailing list archives
Re: External Network / Firewall Setup.
From: "Ivan ." <ivanhec () gmail com>
Date: Wed, 7 Sep 2005 15:42:17 +1000
Pete,
I'm wary of a single point of failure.
Everything you listed in your diagram is a single point of failure? If you want redundancy you would start at the router, make it a HA pair, 2 switches, the FW a HA pair, 2 switches and the last FW a HA pair and 2 more switches. Sorry, I couldn't be bother doing a ascii diag for you. If you go the PIX route the second in a HA pair is half price. Also take a look at Netscreen's, good value.
Should I use the DMZ mailserver simply as a relay for an internal mailserver?
yes, for sure contact me off list if you want a quick and dirty diag cheers Ivan On 9/5/05, lists () ninjafriendly com <lists () ninjafriendly com> wrote:
Hi all, Background: We're a .sch.uk with a currently county-managed firewall and webmail provision. We have a 2mb symmettric DSL connection with approx 30% use at any one time. Due to service and reliability issues with the county-managed solution we are looking to run our own mailserver, accessible from the internet. On balance, maintaining our own firewall setup is less hassle than keeping what we currently have. I'm currently in the process of working out the firewall requirements, what I have so far is this: Internet | Router | Firewall(1) | HUB---Snort(1) | |___Mailserver | Firewall(2) | HUB---Snort(2) | | LAN I suspect this setup may be overkill for the amount of traffic we receive, but I'm wary of a single point of failure. Hardware isn't a problem. Further info: The mailserver will be running Horde. I'm hoping to convince management to use a PIX or similar for the first firewall and then something *nix based for the second, otherwise it will be two *nix boxes (IPcop and something BSD based). Something I'm still unsure about is internal clients connecting to the mailserver in the DMZ - how much of a security issue is this? Should I use the DMZ mailserver simply as a relay for an internal mailserver? Would anyone mind looking this over and telling me if I've screwed up / overlooked something? Thanks Pete
Current thread:
- External Network / Firewall Setup. lists (Sep 06)
- Re: External Network / Firewall Setup. Michael Gale (Sep 07)
- Re: External Network / Firewall Setup. Ivan . (Sep 07)
- Re: External Network / Firewall Setup. lists (Sep 07)
- RE: External Network / Firewall Setup. Mikhail Minyailov (Sep 07)
- Re: External Network / Firewall Setup. Greg Stiavetti (Sep 07)
- Red Cross needs network security tech volunteers Kelley Greenman (Sep 12)
- Re: External Network / Firewall Setup. Greg Stiavetti (Sep 07)
- RE: External Network / Firewall Setup. David Gillett (Sep 07)
- Re: External Network / Firewall Setup. Jayson Anderson (Sep 08)
- <Possible follow-ups>
- RE: External Network / Firewall Setup. Tim.BUTTON (Sep 07)
- RE: External Network / Firewall Setup. lists (Sep 07)
- Re: External Network / Firewall Setup. Florian Rommel (Sep 07)
- RE: External Network / Firewall Setup. Tim.BUTTON (Sep 07)
(Thread continues...)