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Monday, November 19, 2007

Re: only 8 fixed IP's but 42 physical servers (routing with iptables)

Hello,

Michelle Konzack a écrit :
>
> I have a client with a SDSL 3.5 Mbit <nerim.net> and only 8 fixed IP's.

Do you mean a /29 IP subnet ?

> +---+
> ISP 12port |D R|
> nerim.net---SDSL---SWITCH---NIC1-|E O|-NIC2-192.168.0.0/255.255.255.192
> ||| |B U|-NIC3-192.168.0.64/255.255.255.192
> Courier 1 _____/ || |I T|-NIC4-192.168.0.128/255.255.255.192
> Courier 2 ______/ | |A E|-NIC5-192.168.0.192/255.255.255.192
> Apache-SSL ______/ |N R|
> +---+
>
> The two physical mailservers (courier) have already there own IP-Address
> and the same for the Apache-SSL. the other 5 IP's are associated to the
> 5 NIC's.

What do you mean by "associated" ? By the way, aren't 3 out of the 8 IP
addresses reserved as network, broadcast and gateway addresses ?

[...]
> Now I have tried to "ipmask" the four subnets to each one fixed IP

Do you mean "masquerade" ?

> but it seems not to work (from inside, speak, no workstation get an
> internet connection)

There could be many causes. Hard to tell without knowing the Debian
router networking setup.


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