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internet & email server DSL on linux

By rhdyes ·
I am getting a 3 meg service thru DSL for my hospital. I have a 233 mhz pentium with 300 meg of memory and 9 gig scsi drive that I want to use for a linux server. I know this server is more than enough to handle the number of users I will have for the internet. I have several questions. The network is setup as such. I didn't really plan for internet service when I setup up internal network. I am using a super mask of 255.255.248.0, which I knwo shouldn't be a problem, but I am using a network that goes from 180.248.248 to 180.248.255 for my users. I want to use IPchains with redhat 6.2 server. I know this is possible. My question is 2 fold. Do I have to change my network addressing to 192.168.0 thru 192.168.whatever? The ISP is giving me 5 legitimate IP addresses for the internet. The DSL will be coming directly into my linux server then I will have another ethernet card that will interface with my internal network so the packets shouldn't reach the internet. Is my assumption right? That is part one of my questions. My next question is I want to use the same box to setup internet email for my users. Since the ISP is giving me 5 static addresses to work with, how would the best way to use this one box for masquarading and internet email. I want to use sendmail. Is this a good enough email for this. I want to setup pop3 and smtp service on this server. The ISP will handle the DNS part for me. I have a registered domain name. All suggestions will be appreciated.

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internet & email server DSL on linux

Hi!

For part one you are correct your internal traffic won't reach internet.

As for the internal subnet you choosen number 180.x.x.x is true ip's that might exist on the internet so if you don't mind your users not being able to surf to thoosesites then you won't have to switch internal IPs, else you must switch to 192.168.x.x.

There would be no trouble setting up masquarading and email. Sendmail is good enough and if you plan to let users surf you should consider setting up a proxy/webcache server on that linux box, like squid.

That way you'll save some bandwidth.

/Hasse

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internet & email server DSL on linux

by rhdyes In reply to internet & email server ...

The question was auto-closed by TechRepublic

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internet & email server DSL on linux

by Penguin Netwerx In reply to internet & email server ...

Sounds like you got the first part right as far as I can tell. As far as setting this box up as an e-mail server, there is a product out by Bynari called "Insight Server" which I've found works great. It does have a pricetag, but the support is nothing less than outstanding. They didn't support Slackware until we purchased IS, but after about a week's worth of questioning, they do now :) If you have a lot of users wanting internal e-mail, task sharing, calandar sharing, etc., this is a Linux replacement for Exchange server. You can find more about Insight Server @ www.bynari.com. (And no, I don't work for them.)

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internet & email server DSL on linux

by rhdyes In reply to internet & email server ...

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internet & email server DSL on linux

by rhdyes In reply to internet & email server ...

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