Re: How Can I Traceroute but Not Ping

Charles Scott (cscott@freeway.net)
Sun, 17 Nov 1996 01:32:31 -0500 (EST)

Kelley:
Use an unnumbered interface for Ser1 on the 2501 and W1 on the PM2ER.
This will solve these problems.

Chuck

On Sat, 16 Nov 1996, Kelley Lingerfelt wrote:

> I think I know what is happening, not why, but what. Here anyway.
>
> This is the network in a nutshell:
> (Ip Address of
> +----------------+ Cisco Ethernet)
> Ser0 | Cisco 2501 | 206.100.242.12
> Internet<---------+ +-------------------+------+-----
> | (Ser1) | |
> +-------+--------+ +-------+-------+
> 10.1.1.1 | | 206.100.242.11|
> | +---------------+
> |
> 10.1.1.2 |(W1)
> +-----------+----------+
> | Remote Pop PM2ER |
> | Ethernet Ip Address |
> | 206.100.243.129 |
> +----------------------+
>
> Scenario, I telnet from 206.100.242.11 to 206.100.243.129, log in to the
> remote Portmaster. Telnet back from the Portmaster to 206.100.242.11 and
> do a who, and see myself logged in from address 10.1.1.2. Since the
> 10.1.1.2 is in the reserved addresses for internal addresses, I'm sure I
> can't go anywhere on the outside world and expect to get any replies
> back. My cry for help was a false alarm, because everyone that logs in on
> the remote portmaster can surf just fine. They are assigned one of the
> addresses from the pool which is routed back just fine.
>
> How come, when I telnet from the remote PM2ER does it say I am
> originating from 10.1.1.2? I'll have to dig in my TCP/IP books to see why
> a traceroute works but a ping doesn't, but that is my problem, and I will
> do my homework.
>
> Later
> Kelley
>
>
>
>
>
> On Sat, 16 Nov 1996, Michael Blackstock wrote:
>
> > We have the same problem and were told it was a routing problem from our
> > upsteam provider ? Everything seems to work just fine so we haven't
> > pursued it. If you get an answer, let us know.
> >
> >
> > On Fri, 15 Nov 1996, Kelley Lingerfelt wrote:
> >
> > > We just moved and we are trying to get started back up, but we have a
> > > remote pop with a pm2er, I can telnet to the remote pop, but if I try to
> > > ping from the remote pop it will not,(no answer) but if I try a
> > > traceroute it will succeed. Does this sound familiar to anybody, I am at
> > > a loss. Any details needed just ask, will supply all I know of.
> > > HELP!!
> > >
> > > Later
> > > Kelley
> > >
> >
>