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Posted by Leythos on June 6, 2005, 12:56 pm
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@telia.com says...
> Hi!
>
> I wonder if anyone can help me. I have a little network at home with 4
> computers connected to a router (netgear) and I have an adsl-connection.
> What I want is to make the network as secure as possible. I want one of the
> computers to be the maincomputer.
>
> I plan to have a http-server, a ftp-server and maybe a smtp-server in my
> network. I am using no-ip.
Bad news - don't do it until you understand all the security
implications. Based on the questions you are asking, and I'm not
insulting you, you don't have fully secured HTTP/FTP/SMTP services
setup.
> I also wonder if anyone know what I do to make the other computers in the
> network connect to the http-server with the external IP? Now I need to use
> the internal IP. I have changed so I can use the external IP with the
> computer where I have the http-server. I did that in the hostfile where I
> wrote 127.0.0.1 and the domain-name.
You don't want to use a public ip, you want to use the DNS Name, and to
do that, you want to setup a PUBLIC DNS record (A) and point it to your
computers PUBLIC IP (routers public IP), same for the MX record. On the
inside of your network you need to run a DNS service also, you duplicate
the public DNS names on your internal DNS server and then change the
internal DNS pointers to use the internal IP addresses.
So, it would look like this:
Public: mail.mydomain.com 123.123.123.123 (A)
Public: mail.mydomain.com (MX) 10
Public: mydomain.com 123.123.123.123 (A)
Public: www.mydomain.com 123.123.123.123 (A)
Public: ftp.mydomain.com 123.123.123.123 (A)
Inside: mail.mydomain.com 192.168.0.10 (A) Assuming you use 192.168.0.10
Public: mail.mydomain.com (MX) 10
Public: mydomain.com 192.168.0.10 (A)
Public: www.mydomain.com 192.168.0.10 (A)
Public: ftp.mydomain.com 192.168.0.10 (A)
Inside your network your computers point to the DNS server you setup
inside your LAN, not your ISP's DNS server.
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