Bill,
Thanks, I'll give it a shot this weekend.
Carson
--- bill triplett <btt@nethouse.com> wrote:
> On Wed, Sep 05, 2001 at 04:21:11AM -0700, Carson
> Wilcox wrote:
> > I'm trying to get PPP to work across a serial link
> > (null modem), Linux to Linux and my head must have
> > gotten thick yet again.
> >
> > I can ping 'localhost' on both boxes and have an
> entry
> > in /etc/hosts but when I try to start pppd on
> either
> > box I get an error that the IP is bad.
> >
> > The command I'm using for pppd is:
> > pppd -detach crtscts lock <local IP>:<remote IP>
> > /dev/ttyS0 3800 &
>
> Carson...
>
> Here is how I have pppd set up between two linux
> boxes over a null
> modem line:
>
> box 1 runs debian potato (stable) with kernel 2.4.6
> (I had to upgrade
> pppd to 2.4.0 - the one supplied with the distro
> didn't work right
> with 2.4 kernels). box 1 is sort of an all-purpose
> router type-thing
> where it can work as a modem dialout, cable modem
> firewall and ppp server.
>
> box 2 runs debian testing (unstable) with kernel
> 2.4.8 and pppd 2.4.1
> --
> box 1 ('server'):
>
> in /etc/inittab:
> T0:23:respawn:/usr/sbin/pppd /dev/ttyS1 57600
> -detach lock
> noauth proxyarp debug crtscts
> 192.168.1.10:192.168.1.4
> (that's all one line)
>
> the debug bit can be very helpful....
>
> the -detach is needed otherwise init will keep
> respawning pppd's
>
> i use completely different ip's than the ip's on
> ethernet, to keep
> from conflicting with other connections. on
> ethernet, there are
> 192.168.1.1-3, and ppp uses 4 and 10
>
> on box 2 ('client'):
>
> as root:
> pppd /dev/ttyS0 57600 noauth nodefaultroute
>
> the nodefaultroute bit keeps it from changing the
> default route on
> my system to that of the ppp 'server', so my real
> internet still
> goes on the ethernet link. sometimes I use
> defaultroute if the ethernet
> is not up and my only link to the router will be the
> serial ppp link.
>
> the noauth bit is for convienence, otherwise I'd
> have to make a
> /etc/ppp/*-secrets file for security, but since it
> is a serial link
> I'm not worried about it.
>
> I emptied my /etc/ppp/options files to make sure
> that only the
> command line options are in effect. so hopefullt
> this should work
> for you. tcpdump -i ppp0 will be helpful, as will
> the debug options.
>
> hth,
> bill
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