Re: Sharing the ADSL router with a second "network"
- From: "SuperGumby [SBS MVP]" <not@xxxxxxxxxxx>
- Date: Sat, 3 Mar 2007 21:54:28 +1100
looks like iiNet want AU$30/mth for a static IP, the Business Pack, but will
throw in a single /30 subnet (2 usable IP's) for free. Additional /30's seem
to have a one-off cost.
The NAT on the router may be able to handle PublicIP:800->PrivateIP:80 but
you also need to consider the process behind such translation. eg. if you
wanted SMTP to different systems, PublicIP:25->PrivateIP1:25,
PublicIP:250->PrivateIP2:25 then additional facility is required (dyndns
mailhop, I think). It's clumsy.
In the specific case of SMTP there's a better way to handle it. All incoming
mail goes to Exchange on PrivateIP1 and Exchange passes it through to
PrivateIP2/3/4/5/6/7/8/9, depending on domain name. Exchange in this case
basically acts as a store and forward MX.
Web pages would need to be designed with the port translation considered.
All in all, clumsy unless you have multiple IPs.
"Andrew Shaw" <not@xxxxxxxxxx> wrote in message
news:oviiu2p2r3knr2u05sh6lb0vf15nbkk441@xxxxxxxxxx
Hi SG,
Thanks for that, that confirms what I was thinking.
Hypothetically, if I wanted to pick some unused ports, (say 50000 or
something) and forward them in the router to my SBS box and then
append them on to the address in the browser when I want to access it
- would that work? How upset would ISA get when the traffic got to the
SBS box?
Since this is "only" a test setup I'm prepared to do a certain amount
of "tweaking", but by the same token I also don't want to stray too
far from a legit setup because that will come back to bite me one day.
(my ISP is iinet here in Oz incidentally, I'm not sure what facilities
they have for routed subnets - probably worth a call)
On Sat, 3 Mar 2007 21:15:20 +1100, "SuperGumby [SBS MVP]"
<not@xxxxxxxxxxx> wrote:
with only one public IP address you can forward only any particular
IP:PORT
(either TCP or UDP) combination to a specific IP behind the router.eg :80
could go to one server :25 to another.
A more advanced firewall device may allow more flexibility. Such a device
though would need to accept and interpret request.
The more common solution is to ask the ISP for a routed subnet.
Availability
will depend on your ISP.
"Andrew Shaw" <not@xxxxxxxxxx> wrote in message
news:mtgiu25jslgva67uu6vld34g6nf8vc73os@xxxxxxxxxx
Hi,
In my test lab I have my SBS2K3-R2 server sharing my 4-port ADSL
router with another couple of machines. (I know this isn't normal
practice, but I don't have the luxury of a dedicated line I can use
just for the SBS machine, I have to share with a couple of other PCs
also hanging off the same router and I don't particularly want to join
them into my SBS domain, because its a test environment and so is
unstable.)
I have my domain name registered and it resolves correctly down to the
IP address of my ADSL router. I can ping the router just fine from
anywhere.
In trying to access my SBS box from another location though via a
browser using <server-name>.mydomain.name I get the old "can't find
that address" error ( the actual text varies according to what flavour
of browser I use)
I've done nothing in the router yet to direct particular traffic
towards my SBS box so the error seems to make sense, I reckon I have a
router config problem, but I'm not sure what I need to set up there.
(The ADSL router is a Draytek Vigor 2800G by the way.)
What I think I need to have happen is all traffic bound for
mydomain.name needs to be sent to my SBS server. All other traffic
needs to go to whichever of the other 2 PCs its bound for and NAT will
take care of that.
Do I need to use port-forwarding?
Static routes?
something else?
Thanks in advance and apologies also because I've probably left out a
key piece of information, but I can't think what it is!!
Andrew
.
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