Re: [LARTC] Linking two networks

[Abraham van der Merwe <abz@frogfoot.net>]

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Hi Roch?!

> I just had a data line installed between my home and the office. I've
> managed to connect the two sides successfully with ppp and the gateways
> on both sides can see each other. I want the hosts behind the
> gateways to see each other as well and although this is discussed in
> some howtos I couldn't get this right and need some help with the
> routing.
> 
> Here's my setup:
> 
>     At home I have a 192.168.2.0 network and at the office I have a
>     192.168.1.0 network.
> 
>     The gateway at home is 192.168.2.10 and at the office it is
>     192.168.1.10.
> 
>     My routing table at home looks like this:
> 
> Destination  Gateway      Genmask         Flags Metric Ref Use Iface
> 192.168.1.10 0.0.0.0      255.255.255.255 UH    0      0     0 ppp0
> 192.168.2.0  0.0.0.0      255.255.255.0   U     0      0     0 eth0
> 192.168.1.0  192.168.1.10 255.255.255.0   UG    0      0     0 ppp0
> 0.0.0.0      0.0.0.0      0.0.0.0         U     0      0     0 ppp0

You don't need to add a route to get to 192.168.1.0/24 since you your
default gw will route packets to that network anyway. You are also use
192.168.1.10 as a gateway to get onto the 1/24 network which won't work (you
can't use a machine on the network which you want to reach as a gateway).
You want to be using 192.168.2.10 as a gateway to get onto the 1/24 network.

Also, you can use unnumbered ppp. Just do this:

On your home gateway's eth0 assign 192.168.2.10 and on your office's side,
assign 192.168.1.10 to eth1. Then use unnumbered ppp on both sides and make
sure that ip forwarding is enabled on the office gw.

On your office side, you'll have

pppd ... 192.168.1.10:192.168.2.10

and on your home side, you'll have

pppd ... defaultroute :

Of course, you probably have /etc/ppp/* with the pon/poff scripts in which
case you need to add above to your /etc/ppp/peers/* scripts

-- 

Regards
 Abraham

QOTD:
	"I used to jog, but the ice kept bouncing out of my glass."

___________________________________________________
 Abraham vd Merwe [ZR1BBQ] - Frogfoot Networks
 P.O. Box 3472, Matieland, Stellenbosch, 7602
 Cell: +27 82 565 4451 Http: http://www.frogfoot.net
 Email: abz@frogfoot.net


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