static IP, different gateway & dns

Clayton Check" <clayton.check@xxxxxxxxxxxxxx (Clayton Check) · Wed, 23 Oct 2002 21:52:00 +0800

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Hi,

Can iptables NAT or handle nodes that have static IP address not on the =
same subnet as the iptable box, also with different gateway =
configuration and different DNS config?

Overview
A linux box with iptable acts as a gateway to connect several clients to =
the Internet. However, the clients behind this gateway have static IP =
addresses and different gateway and dns configuration. Lets assume that =
changing their network configurations are not possible.=20

Can iptables handle this sort of networking?

                             |--- 192.168.1.12 (gw: 192.168.1.1)
                             |
---- eth0 (iptables) eth1 ---|--- 192.168.10.25 (gw: 192.168.10.1)
                  10.0.0.1/8 |
                             |--- 202.145.23.25 (gw: 202.145.0.5)
                             |
                             |--- 10.0.0.16 (gw: 10.0.0.1)

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<DIV><FONT face=3DArial size=3D2>Hi,</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>Can iptables NAT or handle nodes that =
have static=20
IP address not on the same subnet as the iptable box, also with =
different=20
gateway configuration and different DNS config?</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>Overview</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>A linux box with iptable&nbsp;acts as a =
gateway to=20
connect several clients to&nbsp;the&nbsp;Internet. However, =
t</FONT><FONT=20
face=3DArial size=3D2>he clients behind this gateway&nbsp;have static IP =
addresses=20
and different gateway and dns configuration. Lets assume that changing =
their=20
network configurations are not possible. </FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>Can iptables handle this sort of=20
networking?</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3D"Courier New"=20
size=3D2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=20
|--- 192.168.1.12 (gw: 192.168.1.1)</FONT></DIV>
<DIV><FONT face=3D"Courier New"=20
size=3D2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;|</FONT></DIV>
<DIV><FONT face=3D"Courier New" size=3D2>---- eth0&nbsp;(iptables) eth1 =
---|---=20
192.168.10.25 (gw: 192.168.10.1)</FONT></DIV>
<DIV><FONT face=3D"Courier New"=20
size=3D2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=20
10.0.0.1/8&nbsp;|</FONT></DIV>
<DIV><FONT face=3D"Courier New"=20
size=3D2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=20
|--- 202.145.23.25 (gw: 202.145.0.5)</FONT></DIV>
<DIV><FONT face=3D"Courier New"=20
size=3D2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;|</FONT></DIV>
<DIV><FONT face=3D"Courier New"=20
size=3D2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;|---=20
10.0.0.16 (gw: 10.0.0.1)</FONT></DIV>
<DIV><FONT face=3D"Courier New" size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV></BODY></HTML>

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