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Date:      Thu, 11 Dec 1997 10:08:25 -0700
From:      chad@pengar.com (Chad Leigh)
To:        freebsd-questions@freebsd.org
Subject:   Help setting up virtual ClassC network on a single machine
Message-ID:  <v03102037b0b5ce1cc4a8@[204.228.145.10]>

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I sent the following to the FreeBSD misc newsgroup alreay.  Basically I am
in a real time crunch jam and need to get the following implemented somehow.

Hi All

I am stupid when it comes to routing sometimes and I am in a jam now.

I need to have a machine that has a bunch of aliased IP addresses in my
ClassC (the only place where this class C is used) on it connected to my
ISP on his ethernet.

In other words, my machine is colocated and lives in 204.228.135.128/25
and I am .142 and the router for that subnet is .129

My subnet is 204.228.145.0/24 .  This machine needs to have about 15 IP
addresses on it in my subnet 204.228.145.0/24 .  Because of my SSL server
(Stronghold) the main IP address has to be 204.228.145.132 in my subnet.

So I need to have the 204.228.135.142 ISP-net address and that is the
default route out for the box and I need t ohave my classC addresses on
the box routing out onto the ISP-net.

My description above is way contorted but I hope somebody understands it.

What I am doing is replacing a router and several FreeBSD boxes with a
single FreeBSD box temporarily while I move my operation to another
state.



Old situation:
                                                       .145.252      .145.132
-ISPNET---------------------------------------------[router]-+---[machine]
 204.228.135.128/25                  204.228.135.142         |
                                                             |       .145.134
                                                             +---[machine]
                                                             |
                                                             etc


New situation wanted

                                                       .
-ISPNET---------------------------------------------[machine] .145.252
 204.228.135.128/25                  204.228.135.142          .145.132
                                                              .145.134
                                                               etc


I need helping figuring out all the route commands and how to set this up
and whether a routed or gateway is necessary etc.

Thanks
Chad





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