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Date:      Tue, 2 May 2000 00:49:44 -0700 (PDT)
From:      Fabio Miranda <fmirand@yahoo.com>
To:        freebsd-net@FreeBSD.org
Subject:   Re: Routing questions over leased lines
Message-ID:  <20000502074944.7417.qmail@web110.yahoomail.com>

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Hello, i have sent the msg below and i havent solve
the problem:

> Hi, This is my situation:
> 
> note: I will use the network 209.88.252 for all the
> examples, so,for example, if i refer to a host or
> router 110, it's 209.88.252.110. 
> 
> I'm creating a company that work on web
> design/hosting.
> also, we are going to make a small "cafe internet",
> we
> "rent" hours in internet so ppl can surf, etc. using
> the same connection of the hosting.
> 
> My hosts, network, etc:
> The lan consist on 4 client, windows 98, they  have
> design software and others utils for web design and
> rent for web users.
> The server is a dual pentium II-400 with 128 mb of
> ram
> using FreeBSD-3.4, it will connect the lan to the
> wan
> of my isp and to the internet.
> The network connection consist of a et5025-16
> (etinc.com) card that is connected to a dsu/csu
> (newbridge.com 2601) and from it to a cisco 2509
> (other-end, the isp).
> 
> The newtwork topology:
> I'm connecting to a leased line so, the "basic"
> diagrama of the connection is:
> 105(router, isp) <--> 106(freebsd)
> network: 104
> this can be done by:
> ifconfig eth0 inet 106 104 broadcast 105 netmask 248
> (255.xxxx)
> Ok, but, the network assigned to me, it's the 112,
> so,
> the "right" connec would be like:
> (freebsd host) 106 <--> 112 (another host, in my
> office!)
> but, this cant be done, i mean, I want to use the
> same
> server that belongs to the 104 network.
> This would be the "correct" diagrama:
> 105(ISP) <--> 106 (my router) <-> 113 (my server)
> ******104 NETWORK*****-*****112 NETWORK**********
> so, I want to the freebsd to be "multi-homed" over
> the
> same line.
> I dont really want that my local hosts (the 3
> win98/linux) to have real ip address, i'll do natd,
> really, i just want that the freebsd server uses the
> ips assigned.
> 
> petition:
> please, dont make me question about this network
> topology, I'm not the one who created it!, it's isp
> "privacy" politics; give me a hand for configure
> this
> network.
> right now, the ifconfig output looks like:
> $ ifconfig eth0
> eth0: flags=51<UP,POINTOPOINT,RUNNING> mtu 1500
>         inet 209.88.252.106 --> 209.88.252.105
> netmask
> 0xfffffff8
> I can telnet without problems to the other-end
> router,
> but i want to have internet access, if i try it now,
> i
> cant access,  the isp told me, "you need to use the
> network address that we gave you", that's the
> problem,
> how can i make freebsd to belongs to 112 if the
> interface is configurated for 104?
> better, How can freebsd be "multi-homed" over the
> same
> interface?
> 
> thanks alot!
i tried this:
nietzsche# ifconfig eth0 209.88.252.106 209.88.252.104
broadcast 209.88.252.105
netmask 255.255.255.248
nietzsche# telnet 209.88.252.105
Trying 209.88.252.105...
Connected to 209.88.252.105.
Escape character is '^]'.                             

I can connect to the other point, the route at the
isp.
now, i try to set up my network (209.88.252.112) and
using the first ip: 209.88.252.112:
nietzsche# ifconfig eth0 alias 209.88.252.113 netmask
255.255.255.248
ifconfig: ioctl (SIOCAIFADDR): Destination address
required
nietzsche# ifconfig eth0 alias 209.88.252.113
209.88.252.105 netmask 255.255.255
.248
ifconfig: ioctl (SIOCAIFADDR): File exists
nietzsche# echo "nameserver 209.88.252.105" >>
/etc/resolv.conf
nietzsche# route add -net 209.88.252.113
209.88.252.105
add net 209.88.252.113: gateway 209.88.252.105
nietzsche# ftp ftp.cdrom.com                          

...and i cant connect.

What can i do?, what's wrong with this configuration?.

thanks again!


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