Re: tlug: Infoworld Review

["Stephen J. Turnbull" <turnbull@example.com>]

>>>>> "Alberto" == A Tomita,Jr <Alberto@example.com> writes:

    Alberto> I have a problem here: after having the unfortunate idea of
    Alberto> upgrading to RedHat 5.0, my PPP setup stopped working.

Sigh.

    Alberto> I have a few machines networked using the private IP address
    Alberto> space 192.168.1.0. RH Linux 5.0 (with kernel upgraded to
    Alberto> 2.0.33) is running at 192.168.1.1. The modem is connected to
    Alberto> this machine, that is also my DNS and NIS servers. Its routing
    Alberto> table (netstat -r) shows:

This is not as interesting as `route -n'.  (If the DNS is likely to
get screwy, you need that `-n'.)  In particular, I'd like to know what
the `metric' column says.  You might be able to create dummy routes
with huge metrics through your ethernet card, ie, `route add default
metric 10000 eth0'.  This shouldn't hinder your ability to squirt
packets to 192.168.1.0/255.255.255.0 addresses.

Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface
192.168.1.0     *               255.255.255.0   U      1500 0          0 eth0
127.0.0.0       *               255.0.0.0       U      3584 0          0 lo

After starting PPP, it becomes:

Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface
165.76.88.25    *               255.255.255.255 UH     1524 0          0 ppp0
192.168.1.0     *               255.255.255.0   U      1500 0          0 eth0
127.0.0.0       *               255.0.0.0       U      3584 0          0 lo
default         165.76.88.25    0.0.0.0         UG     1524 0          0 ppp0

Try `route del default' and see if you can ping that gateway machine.
Next `route del 192.168.1.0'.

    Alberto> Apparently the PPP link went up successfully, but... a
    Alberto> traceroute to 152.2.254.81 gives:

traceroute: Warning: Multiple interfaces found; using 192.168.100.1 @ eth0
traceroute to 152.2.254.81 (152.2.254.81), 30 hops max, 40 byte packets
 1  * *

WTF is that 192.168.****100****.1?!!?  I hope it's a typo.

What does your ifconfig say about your interfaces?  Do you have ip
forwarding, firewalling, and/or bridging enabled?  See what `ipfwadm
-{F,I,O} -l' has to say.
---------------------------------------------------------------
Next Saturday Meeting: 14 February 1998 12:30 Tokyo Station
Yaesu Chuo ticket gate.
---------------------------------------------------------------
a word from the sponsor:
TWICS - Japan's First Public-Access Internet System
www.twics.com  info@example.com  Tel:03-3351-5977  Fax:03-3353-6096