Very Computer

I am setting up PPP to run through SSH.  The config I have uses 3 machines
linked in a chains as follows :-

                  Master <----------------------> Internet
<---------------------> Slave
         eth0                 eth1                       eth1
eth0                      eth1              eth0
192.168.3.1/24     1.0.0.1/8          1.0.0.254/8     2.0.0.254/8
2.0.0.1/8     192.168.4.1/24

Each machine has 2 Ethernet cards eth0 and eth1.  All machines have IP
forwarding enabled and I can successfully telnet from 1.0.0.1 to 2.0.0.1.
The middle machine is acting as the internet i.e.. routing everything
between its interfaces.

I have set-up SSH to enable successful logins to a "vpn" on to the Slave
machine from the Master.

I have then set-up a PPP link that negotiates and appears to set-up OK
between both Master and Slave over the SSH link.

The PPP IP addresses that I wish to use are 192.168.1.1 on Master and
192.168.1.2 on Slave.  These appear to get configured on both Master and
Slave as ppp0 but with a subnet mask of 255.255.255.255.

I am unable to ping either address on each ppp0 interface?  I have tried
configuring the netmask manually to 255.255.255.0 using ifconfig and add
routes to route between the 192.168.3.0 and 192.168.4.0 networks but am
still unable to ping or telnet between the two?

I have followed all The Linux VPN/SSH HOWTO's etc. but still no luck.

I am running on RedHat 6.2 using SSH1 (latest release) and PPP 2.3.11.

Any help is much appreciated.

Thanks in advance

David.

]Help!!!

]I am setting up PPP to run through SSH.  The config I have uses 3 machines
]linked in a chains as follows :-

Why? You already have ethernet, why would you now want to place ppp on
top of that?

]                  Master <----------------------> Internet
]<---------------------> Slave
]         eth0                 eth1                       eth1
]eth0                      eth1              eth0
]192.168.3.1/24     1.0.0.1/8          1.0.0.254/8     2.0.0.254/8
]2.0.0.1/8     192.168.4.1/24

I do hope that there are not your real numbers. 1.0.x.x and 2.0.x.x are
not yours to use. Why are you using those numbers?

]Each machine has 2 Ethernet cards eth0 and eth1.  All machines have IP
]forwarding enabled and I can successfully telnet from 1.0.0.1 to 2.0.0.1.
]The middle machine is acting as the internet i.e.. routing everything
]between its interfaces.

]I have set-up SSH to enable successful logins to a "vpn" on to the Slave
]machine from the Master.

]I have then set-up a PPP link that negotiates and appears to set-up OK
]between both Master and Slave over the SSH link.

]The PPP IP addresses that I wish to use are 192.168.1.1 on Master and
]192.168.1.2 on Slave.  These appear to get configured on both Master and
]Slave as ppp0 but with a subnet mask of 255.255.255.255.

That is as it should be. Ppp is Point to Point. Ie ppp connects machine
A with its specific IP address to machine B with its specific IP
address. It is a host to host, not a host to net protocol. You need to
set up routing if you want to have things routed over that network to
other addresses.
Remember that 192.168 are unroutable on the net, but are fine for your
private net.

]I am unable to ping either address on each ppp0 interface?  I have tried
]configuring the netmask manually to 255.255.255.0 using ifconfig and add
]routes to route between the 192.168.3.0 and 192.168.4.0 networks but am
]still unable to ping or telnet between the two?

This will not help. Set up a specific route throught he relevant
machines to get to other machines.