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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