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Date:      Thu, 21 Jun 2001 12:30:46 -0500
From:      "Mario Doria" <mariodoria@yahoo.com>
To:        "FreeBSD Questions" <freebsd-questions@FreeBSD.ORG>
Subject:   I NEED HELP! Very strange networking problems.
Message-ID:  <003101c0fa77$e8b82b90$0081190a@midgar>

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Hello,

We had a network outage at our campus (severe thunderstorm). Under a small
lan, I had a FreeBSD NAT box (IPFILTER + IPNAT) connecting a private network
to the outside (The outside IP address was 132.254.97.16, and an alias of
132.254.97.17). The private network was numbered 192.168.0.0/24. I say was
because when the internet connection came back, I couldn't ping my router.
Very strange.

I called the IT support department at the campus, and they brought a win2k
box to hook up. It saw our router (132.254.103.250) on the first try. When I
went back to the FreeBSD box, it failed, again and again. I've recompiled my
kernel, I also recompiled the generic kernel (plus "options ipfilter") but
to no avail. Still, I cannot see the router.

Now here comes the punch. There is also a private network running on the
inside of the campus (10.25.0.0/16). If the FreeBSD box is configured to get
an IP address from DHCP, it gets a private IP address (10.25.128.150) and it
works just fine. NAT works great, along with everything. If I put the
following lines in my /etc/rc.conf, it wont work, but if I use the same data
on a win2k machine, it works perfectly:

ifconfig_xl0="inet 132.254.97.16 netmask 255.255.248.0"
ifconfig_xl0_alias0="inet 132.254.97.17 netmask 255.255.255.255"
defaultrouter="132.254.103.250"

With that, when I try to ping 132.254.103.250, I get the error "Hos is
down". Doing the same in windoze works perfectly. I hate that, and we need
to get this FBSD box working right now.

Thanks for any help,


Mario Doria



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