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Help with NAT / non NAT on 2130Vn

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07 Jun 2011 12:41 #68107 by know-dice
Replied by know-dice on topic Re: Help with NAT / non NAT on 2130Vn
My network address is .240

.241 is taken by the router

First usable address by other hosts on my network is .242

Gateway IP address is the LAN address of the router, in my case 192.168.xx.254 I always try and make the gateway the highest address - it's just habit...

vmrsss wrote:
This doesn't work for me, possibly there is a mismatch with the ISP router (I have been trying to inspect its routing tables, but couldn't manage), I expected this to learn to route everything through .98, which is the only IP it knows. Perhaps is this a naive assumption? Do I need a static route there too?



What address did you use in the "For IP routing usage"?

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07 Jun 2011 13:14 #68110 by vmrsss
Replied by vmrsss on topic Re: Help with NAT / non NAT on 2130Vn

know-dice wrote: What address did you use in the "For IP routing usage"?



The one that I have decided to give the draytex router, which happens to be ....101.

More precisely:

My public network is ....96/27.
...97 goes to the LAN address of the ISP modem/router
...98-100 I'd like to reserve for three machine
...101 I am trying to assign to the WAN of the draytek router (which uses ...97 as its GW)

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07 Jun 2011 13:25 #68111 by know-dice
Replied by know-dice on topic Re: Help with NAT / non NAT on 2130Vn
I'm probably talking rubbish here...but... :roll:

In the IP routing box put your .97 address

All the other addresses will be "bridged" through from WAN to LAN, so 98-100 machines manually assign their addresses with a default gateway of .97

You shouldn't need the 101 address..."this is my theory that it is".....

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07 Jun 2011 14:18 #68113 by vmrsss
Replied by vmrsss on topic Re: Help with NAT / non NAT on 2130Vn
hmm, then i would have two interfaces on the network with the same IP... doesn't sound right...

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07 Jun 2011 14:26 #68114 by know-dice
Replied by know-dice on topic Re: Help with NAT / non NAT on 2130Vn
No doesn't sound right...but it works :o

You can also do this on some Zyxel routers where you make the WAN & LAN addresses the same...

Give it a try in anycase :roll:

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07 Jun 2011 15:14 #68117 by vmrsss
Replied by vmrsss on topic Re: Help with NAT / non NAT on 2130Vn
ok. of course the DHCP/NAT works well, no problems, and I can access the router on both
its local interface 192.168... and its WAN. But when I try to manually configure a machine
to use a static IP ..., then nothing, it is stuck... I suspect that the isp router (yes, a zyxel)
fails to route packets back to the draytek router, perhaps it tries to contact the machine
directly based on some outdated ARP table... If I could find how to look at the zyxel's
routing table I think I'd learn something interesting...

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