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Hello Can some one guide me with below setup 1. i have a private LAN in the subnet 192.168.100.0 2. i have another private LAN in the subnet 129.221.0.0 3. ...
  1. 10-03-2009 #1
    simha
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    Need Help on IPtables

    Hello
    Can some one guide me with below setup

    1. i have a private LAN in the subnet 192.168.100.0
    2. i have another private LAN in the subnet 129.221.0.0
    3. i have a linux with redhat OS installed having 2 nic cards
    4. 1 NIc card is in 192.168.100.0 subnet and other is in 129.221.0.0 subnet
    5. I want users in 129.221.0.0 netowork need to access machines in 192.168.100.0 netowkr via this linux box
    6.
    i have reserved IPs in 129.221.0.0 network ( to be specific these reserved IP should map to the 192.168.0.0 network using IP tables)
    can some one guide?
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  2. 10-03-2009 #2
    Lazydog
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    If these are both private LAN's then all you need to do is turn on Forwarding.
    Edit /etc/sysctl.conf and change the following;

    Code:
    # Controls IP packet forwarding
net.ipv4.ip_forward = 0
    To

    Code:
    # Controls IP packet forwarding
net.ipv4.ip_forward = 1
    This will setup your system to turn on forwarding anytime the box is booted.

    Now enter the following command to turn on forwarding right now
    Code:
    echo 1 > /proc/sys/net/ipv4/ip_forward
    Now one LAN should be able to talk to the other. Make sure that the routing is setup correctly so that this box will know where to send the packets.

    Regards
    Robert

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  3. 10-03-2009 #3
    simha
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    hai
    thanks for the valuble reply

    i did the IPforwarding as per ur guidence

    My Query is

    i want to access the private LAN (192.168.100.0/24 subnet ) from another private LAN (10.10.10.0) ,,, I haves reserved some IPs in 10.10.10.0 network ,,,,users need to access the Private LAN(192.168.100.0) from the reserved ips in 10.10.10.0 network

    can u tel me how to set IPtables rules ( using DNAT/SNAT)
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  4. 10-03-2009 #4
    freelinuxtutorials
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    Quote Originally Posted by simha View Post
    hai
    thanks for the valuble reply

    i did the IPforwarding as per ur guidence

    My Query is

    i want to access the private LAN (192.168.100.0/24 subnet ) from another private LAN (10.10.10.0) ,,, I haves reserved some IPs in 10.10.10.0 network ,,,,users need to access the Private LAN(192.168.100.0) from the reserved ips in 10.10.10.0 network

    can u tel me how to set IPtables rules ( using DNAT/SNAT)
    what is your default router of 10.10.10.0 network? you can always use the command "route" to route add network.
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