Re: IP

[luis <luis@aztlan.fb10.tu-berlin.de>]

> From pbrutsch@creighton.edu  Wed Dec 22 04:06:42 1999
> Delivered-To: fixup-luis@aztlan.fb10.tu-berlin.de@fixme
> Date: Tue, 21 Dec 1999 20:06:44 -0600 (CST)
> From: Phil Brutsche <pbrutsch@creighton.edu>
> X-Sender: phil@fury.brutsche.org
> To: luis <luis@aztlan.fb10.tu-berlin.de>
> cc: Debian-User <debian-user@lists.debian.org>
> Subject: Re: IP
> In-Reply-To: <[🔎] 199912210910.KAA03677@aztlan.fb10.tu-berlin.de>
> MIME-Version: 1.0
> Content-Type: TEXT/PLAIN; charset=US-ASCII
>
> A long time ago, in a galaxy far, far way, someone said...
>
> > when i connect using ppp and get a dynamic IP as 195.243.107.221 i can
> > not make a telnet to me from another machine
> > 
> > from another machine (cenected using eth0) i can ping to the machine
> > using ppp, but when i try to make a telnet to the ppp machine i always
> > get the following:
>
> Machine A: connected through ppp
> Machine B: connected through ethernet
>
> What's the IP# of the machine b?
>

130.149.13.129

> > trying 195.243.107.221
> > telnet: unable to conect to remote host: no route to host
>
> This means that machine b doesn't know how to get to the IP# you
> specified.  What does the network topology look like?
>

sorry for my ignorance, how could i know the topology ?

a ping looks like: 

$ ping -R -c 1 195.243.107.53
PING 195.243.107.53 (195.243.107.53): 56 data bytes
64 bytes from 195.243.107.53: icmp_seq=0 ttl=238 time=242.9 ms
RR:     aztlan.fb10.tu-berlin.de (130.149.13.129)
        130.149.7.5
        130.149.8.1
        KR-TU-Berlin1.WiN-IP.DFN.DE (188.1.1.110)
        TU-Berlin1.WiN-IP.DFN.DE (188.1.162.38)
        ZR-Berlin1.WiN-IP.DFN.DE (188.1.144.105)
        ZR-Frankfurt1.WiN-IP.DFN.DE (188.1.144.54)
        ZR-Hamburg1.WiN-IP.DFN.DE (188.1.144.21)
        ZR-Hannover1.WiN-IP.DFN.DE (188.1.180.25)

--- 195.243.107.53 ping statistics ---
1 packets transmitted, 1 packets received, 0% packet loss
round-trip min/avg/max = 242.9/242.9/242.9 ms


> > my IP always gives me a dynamic IP as 195.243.107.xxx
> > 
> > the gateway is: 195.243.104.1
> > 
> > i can make outbound services: web, ftp, email (out and in), etc
>
> Outbound from machine a, I presume.
>

yep

> > but i need inbound access to that machine with ppp
> > 
> > where is the failure? in my end? with my ISP?
> > 
> > i believe that the IP of the gateway is reserved,
>
> Of sorts: the IP of the gateway has to be unique on the network it's
> connected to, the Internet in this case.
>
> > and that the IP given to me are C class,
>
> It is.
>
> > does this have some influence?
>
> It shouldn't.
>
> > is possible to make a telnet to my machine using these IPs ?
>
> Not without knowing more about the network topology.
>

how could i know the topology ?

> -- 
> ----------------------------------------------------------------------
> Phil Brutsche					pbrutsch@creighton.edu
>
> "There are two things that are infinite; Human stupidity and the
> universe. And I'm not sure about the universe." - Albert Einstein
>

thanks a lot

erasmo