Mailinglist Archive: opensuse (4570 mails)

[Jerry Feldman <gaf@xxxxxxx>]

On Saturday 05 November 2005 11:34 am, Robert Fitzpatrick wrote:
> I have a problem seeing certain IP's in my own subnet assigned by the
> ISP, looking for help on how I can get it to work.
>
> I have my SuSE Linux workstation with 192.168.1.25 behind a NAT router
> which is the default gateway for the workstation at 192.168.1.1. Now, I
> have a second IP in my wks within the subnet assigned by the ISP let's
> say 1.2.3.43/29, this is to allow hosting of some services, no firewall
> in place, yet. I have another Linux server at 1.2.3.44/29. I cannot see
> the other Linux server from my workstation. Perhaps routing can
> accomplish this for me, but I'm totally stupid on how to set that up,
> can someone suggest?
I'm not sure exactly how you have this set up. The low cost Cable Modem 
Routers (Linksys, Netgear) really do not handle this well if you have 
multiple public IP addresses. Let's assume that you have 2 assigned IP 
addresses, 1 for the router and 1 for your server.
External Network----------Switch---------Router----192.168.1 subnet
                                              |                 (.43)
                                              +--Server (.44)
In this case, your default route should allow you to access the server, BUT 
the server will not be able to directly access the 192.168.1 subnet 
directly unless one of those systems is set up as a DMZ host or you use 
port forwarding. 

A second NIC connected outside of the router would work, but the low cost 
routers can only handle a single subnet. 

-- 
Jerry Feldman <gaf@xxxxxxx>
Boston Linux and Unix user group
http://www.blu.org PGP key id:C5061EA9
PGP Key fingerprint:053C 73EC 3AC1 5C44 3E14 9245 FB00 3ED5 C506 1EA9