You probably need to add the following to your /etc/ppp/options file:
proxyarp
Fred
David Taylor wrote:
>
> I have just recently set up a dial-in server to provide ppp access to
> our network here. Unfortunately, it is not working 100%.
>
> Dial-in connections and authentication seem to work flawlessly.
> However, the users are unable to access any machines beyond the dial-in
> server.
>
> Using ping and some jiggery-pokery, it appears that ICMP echo requests
> from the dialin-users are reaching other hosts but not being returned.
>
> I tried pinging one of the dialin-users from one of these other hosts.
> The results are below (with certain information changed to protect the
> innocent):
>
> [dltaylor]$ /usr/sbin/ping dialin.user.ip.address
> ICMP Host Unreachable from gateway gw.host (gw.ip)
> for icmp from remote.server.host (remote.server.ip) to dialin.user.host
> (dialin.user.ip)
> ICMP Host Unreachable from gateway gw.host (gw.ip)
> for icmp from remote.server.host (remote.server.ip) to dialin.user.host
> (dialin.user.ip)
> ICMP Host Unreachable from gateway gw.host (gw.ip)
> for icmp from remote.server.host (remote.server.ip) to dialin.user.host
> (dialin.user.ip)
> ICMP Host Unreachable from gateway gw.host (gw.ip)
> for icmp from remote.server.host (remote.server.ip) to dialin.user.host
> (dialin.user.ip)
>
> As you can see from the "ICMP Host unreachable", this is a delivery
> problem.
>
> Now, the dial-in server itself has no problems accessing or being
> accessed by other hosts.
>
> [dltaylor]$ /usr/sbin/ping dialin.server.host
> dialin.server.host is alive
>
> As nothing else is affected, except ppp connections, I have a feeling
> that it's a ppp problem. So, here is a copy of /etc/ppp/options:
>
> [dltaylor]$ cat /etc/ppp/options
> asyncmap 0
> netmask 255.255.252.0
> crtscts
> modem
> lock
> auth
> papcrypt
> welcome /etc/ppp/welcome
> ms-dns primary.dns.ip
> ms-dns secondary.dns.ip
>
> Here is the ppp entry in mgetty's login.config:
>
> [dltaylor]$ grep "AutoPPP.*pppd" /etc/mgetty+sendfax/login.config
> /AutoPPP/ - - /usr/sbin/pppd auth -chap +pap login
>
> I am completely stuck now. Is there anyone that can help?
> Pleeeeeeease? :-)
>
> ps. The machine is a P133 w/ 32MB RAM. It's running RedHat 6.1 w/
> Kernel 2.2.14. I am using a Cyclades SM16 Serial Module to connect the
> modems.
>
> --
> David
>
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