public subnet behind Linux Router

[netguy2000]

following are my Linux router information

eth1= WAN IP= 110.88.89.66/32
Gateway= 110.88.89.65
eth0= LAN IP= 192.168.1.1/24

Chain POSTROUTING (policy ACCEPT)
target prot opt source destination
MASQUERADE all -- 0.0.0.0/0 0.0.0.0/0

routing table is

110.88.89.64 0.0.0.0 255.255.255.252
192.168.1.0 0.0.0.0 255.255.255.0
0.0.0.0 110.88.89.65 0.0.0.0

My ISP gave me IP Pool 110.88.90.68/29 to use this on my LAN.
my question is how can I use this IP pool on LAN side interface.
i think now its simple.

192.168.1.0 /24 is my LAN network and I can not change this, because i have near 180 PCs on my LAN.

Help require.

NETGUY.

[Kloschüssel]

you were assigned the subnet 110.88.90.68/29, thus you can address exactly the subnet mask count of computers from the internet by nat forwarding packets for these single ip's to a /29 subnet within your LAN and assigning the router device to listen for all the IPs from the 110.88.90.68/29 subnet.

so, nat forwarding the subnets would be (the ? is variable):
110.88.90.68/29 => 192.168.1.?/29

i.e.
110.88.90.68 => 192.168.1.1

it can be easily done with iptables. use the search button or ask google how to set up nat forward.

[netguy2000]

I did this but still no victory

NET

[Kloschüssel]

You did what? For each ip you need to configure 3 things:

1] router must listen on that ip (man ifconfig)
2] router must accept the packets for the ip (man iptables)
3] router must nat forward the packets for that ip to the internal subnet ip address (man iptables)

As you have a /29 subnet, you should have 2^(32-29) = 8 ip addresses starting with 110.88.90.68.