*BSD News Article 53989


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From: mehldau@photogrammetrie.de (Gerhard Mehldau)
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: Help: can't get IP-forwarding to work
Date: 30 Oct 1995 12:40:17 GMT
Organization: Photogrammetrie GmbH
Lines: 59
Message-ID: <472h3h$sqq@muenchen.photogrammetrie.de>
NNTP-Posting-Host: muenchen.photogrammetrie.de
X-Newsreader: TIN [version 1.2 PL2]



Hello world,

I'm having a problem getting IP-forwarding to work on a Compaq 386/25,
running FreeBSD 2.0.5.

I have configured two 3COM boards as shown below, and manually do a
'sysctl -w net.inet.ip.forwarding=1' after the machine has booted. 

The routing tables below look fine to me -- what am I missing?

Gerhard


# ifconfig ed0
ed0: flags=8863<UP,BROADCAST,NOTRAILERS,RUNNING,SIMPLEX,MULTICAST> mtu 1500
	inet 193.29.190.62 netmask 0xffffffe0 broadcast 193.29.190.63
	ether 02:60:8c:6c:5b:54 

# ifconfig ie0
ie0: flags=8863<UP,BROADCAST,NOTRAILERS,RUNNING,SIMPLEX,MULTICAST> mtu 1500
	inet 193.29.190.165 netmask 0xffffffe0 broadcast 193.29.190.191
	ether 00:60:8c:5c:ca:ab 

# netstat -i -n
Name  Mtu   Network     Address            Ipkts Ierrs    Opkts Oerrs  Coll
ed0   1500  <Link>02.60.8c.6c.5b.54           15     0        7     0     0
ed0   1500  193.29.190. 193.29.190.62         15     0        7     0     0
lp0*  1500  <Link>                             0     0        0     0     0
ie0   1500  <Link>00.60.8c.5c.ca.ab           11     0        8     0     0
ie0   1500  193.29.190. 193.29.190.165        11     0        8     0     0
lo0   16384 <Link>                           110     0      110     0     0
lo0   16384 127         127.0.0.1            110     0      110     0     0
sl0*  552   <Link>                             0     0        0     0     0
tun0* 1500  <Link>                             0     0        0     0     0

# netstat -r -n
Routing tables

Internet:
Destination      Gateway            Flags     Refs     Use     Netif Expire
127.0.0.1        127.0.0.1          UH          0        0       lo0
193.29.190.32    link#1             UC          0        0 
193.29.190.57    0:60:8c:73:ca:ab   UHLW        0        3       ed0   1138
193.29.190.62    2:60:8c:6c:5b:54   UHLW        0       12       lo0
193.29.190.160   link#3             UC          0        0 
193.29.190.165   0:60:8c:5c:ca:ab   UHLW        0       98       lo0
193.29.190.175   0:0:c0:7f:25:60    UHLW        0        4       ie0   1100
224              link#3             UCS         0        0 

# sysctl net.inet.ip.forwarding
net.inet.ip.forwarding = 1

---------------------------------------------------------------------------
    Gerhard Mehldau
    Photogrammetrie GmbH       email:   mehldau@photogrammetrie.de
    Anzinger Str. 5            phone:   +49 (89) 43 69 2-1 64
    81671 Munich, Germany      fax:     +49 (89) 43 69 2-1 00