Date: Sat, 17 Jul 1999 08:32:21 -0400 From: "Francisco Reyes" <francisco@natserv.com> To: "FreeBSD questions" <questions@freebsd.org> Subject: Routing with same subnet? Message-ID: <199907171231.IAA25076@vulcan.addy.com>
next in thread | raw e-mail | index | archive | help
My first shot at routing.
I saw many questions and responses in the archives, but there
are still things I don't understand.
What I am trying to do is to setup my FreeBSD box as a Firewall.
The setup:
Computers-->hub1 -->ed0 -->FBSD -->de0 -->DSL Router -->Internet
IP Addresses:
Computers 216.44.153.70 to 216.44.153.72
router 216.44.153.65
de0 216.44.153.66
ed0 216.44.153.67
netmask 255.255.255.240
The FreeBSD, 2.2.7, can see the internet through de0.
The problem I am having is with the computers not seeing FreeBSD
through ed0.
The output of netstat is:
Internet:
Destination Gateway Flags Refs Use
Netif Expire
default 216.44.153.65 UGSc 11 108
de0
localhost localhost UH 11 469
lo0
216.44.153/28 localhost UGSc 0 0
de0 =>
216.44.153 link#2 UCSc 0 0
216.44.153.64/28 link#1 UC 0 0
216.44.153.65 0:0:c5:71:cb:ac UHLW 12 0
de0 1182
75ml localhost UGHS 1 26
lo0 =>
75ml/32 0:c0:f0:21:14:45 ULS2c 0 0
lo0
localhost localhost UGHS 1 0
lo0 =>
216.44.153.67/32 0:e0:29:40:e8:ae ULS2c 0 0
de0
216.44.153.70 link#1 UHLW 1 396
216.44.153.79 ff:ff:ff:ff:ff:ff UHLSb 4 318
de0
I tried several route lines such as:
route add net 216.44.153.0 216.44.153.67
route add net 216.44.153.0 216.44.153.67 -netmask
255.255.255.240
route add 216.44.153.70 216.44.153.67
Based on what I read on the archives it seemed as if it would
not be possible to route between the two interfaces with the
addresses I am using (216.44.153.67 and 216.44.153.66), but the
man page for route has:
"In a change or add command where the destination and gateway
are
not sufficient to specify the route (as in the ISO case where
several
interfaces may have the same address), the -ifp or -ifa
modifiers may
be used to de-termine the interface or interface address."
From that it seems it may be possible, however I tried adding
"-ifp 2" and that didn't help. Also tried "-ifa 216.44.153.67".
Both did not give errors
but didn't work either.
Will I need to change to/add a different IP address to one of
the cards?
I don't mind if the internal card, ed0, has a non-routable IP
such as 10.0.0.1. How about the internal computers? Will they
need to be switched to the 10.0.0.0 subnet?
Did I miss something in the syntax of the "ifp", "ifa" switches?
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-questions" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199907171231.IAA25076>