Hi! I'm a newbie at networking in general and at configuring Linux services in particular.
I have an SDSL connection from an ISP, where my router has a fixed address on the internet and the network on my side of the router is a subnet, with an address range 192.168.1.0 through 255. I think I grasp that. I'm having trouble with Email and DNS services, which may be due to my not fully understanding (a) some missed details about subnets that I should know and (b) some points about my router's IP address.
I have a Linux box, which I want to use as a web server and as an email server. I have managed to configure Postfix successfully, so that I can send email to user accounts on this box and also send messages out to internet addresses. But, I cannot reply back to my domain from an internet address.
I registered [mydomain.com] with Network Solutions and listed the world IP address of my router as the primary nameserver. I figured that was one step in the right direction toward making my domain "visible" for sending in email and for facilitating www browsing. Was that the correct thing to do? The more I think about it, I wonder: do I need DNS?
What I want is the following: any mail addressed to user@[mydomain.com] to get delivered to my Linux box, whereupon it gets delivered to users within that domain, subject to filtering I setup on this Linux box. Also, any calls for www.
[mydomain.com] should find the www pages setup on this box. In order for those things to happen, should I be trying to setup DNS on my own?
If you haven't guessed by now, I'm completely lost and the HOWTO's aren't helping. I'd appreciate it if somebody could explain or point me to a good beginner's
tutorial (that uses idiotic examples and illustrations
) on networking, subnets and public services.
It's been a month and I still don't get it! I'm normally a pretty quick study...