ppp sharing via NAT

Hello,

I want to use NAT to share a ppp Connection.


PC1 and PC2 are within a private Subnet connected via 4-Port Hub
(integrated within DSL-Modem).

PC1 is connected to DSL-Modem via eth0 and establishes PPP-
Connection.

PC2 is connected to private Subnet via eth0.

Is it possible to route Internet Packets from PC2 to PC1 (by setting
PC1 as Standard Gateway),
PC2 does NAT and forwards packets via ppp?

(E-Mail Removed) writes:

>Hello,

>I want to use NAT to share a ppp Connection.


>PC1 and PC2 are within a private Subnet connected via 4-Port Hub
>(integrated within DSL-Modem).

>PC1 is connected to DSL-Modem via eth0 and establishes PPP-
>Connection.

>PC2 is connected to private Subnet via eth0.

>Is it possible to route Internet Packets from PC2 to PC1 (by setting
>PC1 as Standard Gateway),
>PC2 does NAT and forwards packets via ppp?

Sure. Just do it.
Make sure forwarding is enabled on PC1. Since you are already connected,
the router itself is probably doing nat, so there is no need for you to do
an extra nat ( in fact it would confuse everything).

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,--- Unruh writes:
| (E-Mail Removed) writes:

|| Hello,

|| I want to use NAT to share a ppp Connection.


|| PC1 and PC2 are within a private Subnet connected via 4-Port Hub
|| (integrated within DSL-Modem).

|| PC1 is connected to DSL-Modem via eth0 and establishes PPP-
|| Connection.

|| PC2 is connected to private Subnet via eth0.

|| Is it possible to route Internet Packets from PC2 to PC1 (by setting
|| PC1 as Standard Gateway),
|| PC2 does NAT and forwards packets via ppp?

Did You mean to say, "PC1 does NAT and forwards packets via ppp?", hmm... ?

| Sure. Just do it.
| Make sure forwarding is enabled on PC1. Since you are already connected,
| the router itself is probably doing nat, so there is no need for you to do
| an extra nat ( in fact it would confuse everything).

I don't think in this case, DSL-Modem is acting as router. It is
acting as a bridge. So, OP has to masquerade on ppp interface:

# iptables -t nat -A POSTROUTING -o ppp+ -j MASQUERADE

TIA
- --
Ashish Shukla आशीष श�क�ल http://wahjava.wordpress.com/
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