On Fri, 10 Oct 2003 11:41:01 -0400 "liquid" <[EMAIL PROTECTED]> granted us these pearls of wisdom:
> > > > -----Original Message----- > > From: [EMAIL PROTECTED] [mailto:owner-freebsd- > > [EMAIL PROTECTED] On Behalf Of Ian Moore > > Sent: October 10, 2003 9:59 AM > > To: freebsd-questions > > Subject: ADSL modem & ip addresses > > > > Hi, > > I'm organising an ADSL connection and I'm a bit confused about our > > options. > > > > We need to provide web, ssh and mail access to our network for users > > from home > > across the Internet with an ADSL connection. > > I figure the best way to do this is to setup a new machine to act as a > > firewall and run a web server & sendmail on this box. (or I have seen > > something about using socket to divert these services to our existing > > server > > which has a private address). > > It's not a wise move to run the services on the same machine as your > firewall. You can setup an openbsd machine to serve as your firewall on > a very inexpensive old machine, running it as a gateway as well. You > can then forward specific ports (80, 25, 110 in your case) to your > services machine running either in a DMZ or behind the firewall. > Regarding the whole diverting issue, I encourage you to google "dual > homed hosts" I had some pretty favourites on my windows machine but I > lost them all when a hard drive died or I'd have some good ones for you. > > > The firewall would have a NIC with a private IP address to connect to > > the rest > > of our network. > > > > What's the best way then to connect it to the ADSL line? > > Do we have a second NIC in the firewall machine with a real IP address > > connected to an ADSL modem and use ppp -natd on that interface? Does > > that > > mean we'd need 2 static IP addresses - one for the firewall & one for > > the > > modem? (We really don't want to pay for 2 addresses) > > If you use pppoe, you can run ppp -ddial -quiet on startup by including > that in rc.conf. Checkout /etc/defaults/rc.conf. I setup a machine to > act as a gateway/firewall for 5 PC's on a 3mbit dsl line once... on a > P120 and it ran flawlessly. > > You don't need two IP's. Your modem *shouldn't* have to have an IP. If > it does, it's because it also acts as a router and hence does the pppoe > auth. I suppose you can use that as a router instead.. it's your > network ;) I like the flexibility my router provides me however. It's > remarkably easy to setup as well. Again I don't have any links right > now off-hand, but if you search for pppoe + freebsd + ipnat or something > you'll find some very good tutorials. There was this one for a cable > connection I used as a guide the first time, and just followed the steps > from other sources for setting up PPPoE. > > > > Or can we use a USB connection instead - are there FBSD drivers for > > ADSL > > modems? I can't see any in the supported hardware list. > > AFAIK, there is no support (yet?) for a usb modem. I don't like them > anyway - I keep my apples with my apples, my oranges with... you guessed > it, the oranges. ADSL = network related stuff = runs on Ethernet. > > > > Or do we use a combined modem/router device to do the nat & > > firewalling and > > have it redirect mail, web & ssh access to our main server? (is that > > possible > > or do such devices not allow access into the network from the 'net?) > > > by default they will not. As I said they work, but I'm not sure the > devices that are a modem + router built-in will also include > firewalling. Actually quite a few of the SOHO DSL routers I've seen do include simple firewalling but often enough they are only configurable via a browser and have a kind of all or nothing stance. For fine granular control over the firewall it is hard to beat FBSD and IPFilter / IPFW for the price - it just doesn't come with a pretty web interface ( not that you couldn't build one if you had the time or the energy I suppose. _______________________________________________ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"