I have considered DMZ - although I don't think all traffic is fowarded? Do I have to turn the firewall on the router off when using DMZ to get all traffic fowarded?
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Static IP Routing & NAT
Hi all. I have recently aquired a Public IP address. What I need to know is, can I map this IP to a server and route all internet traffic to it? The modem/router I use is a Linksys WAG200G. What i'm trying to do is give this server full access to the internet (inbound & outbound). It will have ISA 2006 on it. Currently, the router has NAT enabled. Can I disable this & create a static route to the server? I'm thinking of using the IP address 172.16.0.0/24 range. Urgent help is needed please :)
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Answers
I'm not 100% on this but as far as I know linksys routers don't allow you to do Static NAT.
If you want that server to route then remove the linksys altogether and add another NIC to that server then NIC one would be the static public IP that you have and the other NIC would be your 172.16 network and your computer will be doing the routing. It's called internet connection sharing. I've had that setup and works really well.
another thing is if you are using /24 why don't you go with a class C network such as 192.168.1.0 /24? But again that doesn't matter?
Let me get this straight, is your DSL modem and Router an all in one box? If so then you have to disable all the routing features from it and make it a plain DSL modem (aka layer 2 bridge mode).
Some modems allow you to do this and some don't, depends on the brand. Busines DSL modems such as Netopia allow you to do this, but the home use models such as 2wire don't allow you to do things like that.
I have been able to put it in the DMZ and all looks fine - able to ping externally & access whatever I open ISA. How secure would this be? I heard that it wasn't a good idea to have a ISA server in the DMZ and allow it to access the private network. I have posted another question regarding this setup.
TranzRail I don't know about your "router" box, but those ADSL/router hybrid are usually setup in such way:
- there is "DMZ" mode which usually means all packets are translated to specified IP, ports lefts intact. So it's just another "special" static NAT mode.
- there is "normal" NAT mode, which is usually able to function alongside the "DMZ" mode, so other computers can usually use services of the hybrid's firewall next to the "DMZ-ed" machine (which has full access).
- all this devices are intended for home and only after that for small office use. So UnPnP is usually enabled by default. That means local computers can still open ports and make connections, if they address hybrid directly. Without any password usually.
- their firewall engine and DHCP server implementations usually suck.
- disable everything what can be disabled - UnPnP, NAT, Firewall
- switch hybrid to "bridge" mode
- install PPPoE client to your ISA server or whatever machine you plan to use as bastion host/gateway.
- for PPPoE client, use credentials provided by your DSL provider. It should work out of the box, new interface should appear, with your external address within bastion's OS.
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by: synsterkyPosted on 2009-11-12 at 21:54:50ID: 25811687
DMZ? Should allow you to forward all traffic to one IP.