For someone who knows about DG834G's!

NorthstaNder · 28 May 2009 at 10:17

Hi guys,

I just wanted to check my router set up with you…I have done this on the advise of tech support for my ISP.

I have a netgear DG834G v4 and have the following attached to it, all with manual ip’s

192.168.0.5 Laptop
192.168.0.10 Printer
192.168.0.15 Xbox 360

UpnP is enabled because my dad often brings his laptop over and it’s easy just to plug into the network and go.

However, I also have port forwarding set up for my xbox so that I get an open NAT. If I don’t forward the necessary ports then my xbox whinges because the NAT is moderate or strict despite having UPnP enabled.

My ISP support has suggested all the above is fine, but to prevent possible IP address clashes I should change the DHCP IP address range slightly to start AFTER 192.168.0.15

Does this make sense to anyone? Or would I be better off just plonking the xbox into the routers DMZ?

thanks in advance

PS router firmware I'm using is 5.01.09. I'm aware there is a newer version (5.01.14) but that gives me problems with xbox live, but apparently it fixes some UPnP issues.

axer · 28 May 2009 at 10:34

Your ISP are correct to say that your DHCP scope should be outside of your reserved IP. In keeping with your current spacing, I would start the DHCP scope at 192.168.0.20

NorthstaNder · 28 May 2009 at 13:22

axer said:
Your ISP are correct to say that your DHCP scope should be outside of your reserved IP. In keeping with your current spacing, I would start the DHCP scope at 192.168.0.20

thanks mate. i shall sort that later on.

although, i haven't actually reserved the ip address in the routers settings, i've just configured the laptop, printer and xbox with their own set ip's. is that still ok?

NorthstaNder · 28 May 2009 at 18:44

is this ok to do?

hello,

following on from a thread i created earlier i just wanted to ask another quick question. hope you don't mind.

ok...netgear dg834g v4 router which has the following connected to it: laptop, xbox 360 and printer.

all are set up to obtain their ip's manually and i have now set the dhcp settings to start at 192.168.0.25 which is after the ip's the laptop, xbox and printer uses. but will my laptop etc still be able to obtain their ip's if the dhcp doesn't start until 192.168.0.25?

should i just start the dhcp at 192.168.0.2 and reserve the ip addresses instead to prevent any possible ip clashes?

thanks in advance

user1453 · 28 May 2009 at 19:05

so long as no two things on your network have the same ip addreas you are fine.

It doess not matter if some devices have a manually set ip so long as your dhcp server will not issue those ip's to anything else

so you should be fine with your setup

tolien · 28 May 2009 at 19:09

NorthstaNder said:
will my laptop etc still be able to obtain their ip's if the dhcp doesn't start until 192.168.0.25?

If they're manually set, there's nothing to obtain.

The easier way would have been to set the DHCP server to give a specified IP to the MAC addresses of the devices you want to give static IPs to. That way they're still getting an IP etc. automatically from the router.

NorthstaNder · 28 May 2009 at 19:28

thanks guys.

this has been confusing me a little bit, but it looks like there are 2 or 3 methods of achieving the same result, all of which are fine.

at the moment it's all set like this...

192.168.0.5 = laptop
192.168.0.10 = printer
192.168.0.15 = xbox 360

all of which are manually set

192.168.0.25 = start of ip range for DHCP for when dad/friends bring their gear to my house.

i'd still like to keep the devices with their manual ip's (it's easier that way as they are already sorted!) so the other option for me is to start DHCP at 192.168.0.2 which is the router default and then make sure the router reserves the three ip addresses for the laptop etc which i can easily do in the router's ip reservation table.

tolien · 28 May 2009 at 19:29

If you leave it at 192.168.0.2, it won't give anything else those IPs unless those machines are off. By "reserve", does it ask for the machines' MAC addresses, or is just removing them from the DHCP pool?

NorthstaNder · 28 May 2009 at 19:34

tolien said:
If you leave it at 192.168.0.2, it won't give anything else those IPs unless those machines are off. By "reserve", does it ask for the machines' MAC addresses, or is just removing them from the DHCP pool?

yeah it does ask for the mac address.

i can switch everything on, and then call up a list of devices that are connected to the router. this will show me each device, it's ip address, mac address and device name.

i can then select each one and add it to the reservation table. but everything seems to be working fine by having the dhcp start at 192.168.0.25

i just wasn't sure if the 3 devices would still be able to get their ip addresses from the router if the dhcp was set to start at that point (i don't know enough about networking!)

tolien · 28 May 2009 at 19:45

NorthstaNder said:
yeah it does ask for the mac address.

That's what I suggested then. You can set the device to get an IP automatically and it will get the same one all the time.

i just wasn't sure if the 3 devices would still be able to get their ip addresses from the router if the dhcp was set to start at that point (i don't know enough about networking!)

If they're set manually, they're not getting an IP from the router.

NorthstaNder · 28 May 2009 at 19:48

cool, thanks for your guidance tolien.

as all seems to be ok i shall leave it as it is. especially the xbox, i had some odd problems with that when it was set to obtain it's ip automatically which is why i set that to manual, and everything else too but then i wasn't using the address reservation at that point. so i might have a play around with that, but then it does all seem find at the moment.

thanks again.

pennywise · 29 May 2009 at 01:35

I presume that, if DHCP was setup to start at 192.168.0.2, and there are enough devices connected to the network so that .5 is allocated to something when the OPs laptop is off, this is when it would flid out and come up with an error? Or would the laptop override and cause the router/DHCP to allocate a new IP address for the intrusive device while it takes over control of the .5 address?

Does DHCP always take the first available address in the pool or can it take one higher up the list, such as .11 even if say, .3 is free?

Sorry if this is straying off-topic, but it might help clear up some things to the OP and certainly to me.

tolien · 29 May 2009 at 10:07

If the IP was manually assigned on the device then the DHCP server would blindly assign the IP and you'd wind up with an IP conflict. If you either reserved the IP or excluded it from the DHCP pool, it won't be assigned to anything else.

pennywise · 29 May 2009 at 13:49

tolien said:
If the IP was manually assigned on the device then the DHCP server would blindly assign the IP and you'd wind up with an IP conflict. If you either reserved the IP or excluded it from the DHCP pool, it won't be assigned to anything else.

Splendid, that's that cleared up for me then.