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Date: Mon, 7 Jan 2002 19:26:24 +0100
From: Walter Hop <walter@binity.com>
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To: FreeBSD Questions <freebsd-questions@freebsd.org>
Subject: PPPoE interface with millions of addresses!
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Hi all,

I have set up a PPPoE connection using ``ppp'' on a FreeBSD 4.3-RELEASE
system. The funny thing is, my tun0 interface is gathering IP addresses.
At every disconnect, the old IP address of the interface is maintained so
after a few network quirks, the interface is loaded with addresses:

% ifconfig tun0 | more
tun0: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1492
        inet 62.234.21.18 --> 255.255.255.255 netmask 0xffffffff
        inet 62.234.20.186 --> 255.255.255.255 netmask 0xffffffff
        inet 62.234.20.162 --> 255.255.255.255 netmask 0xffffffff
        inet 62.234.20.119 --> 255.255.255.255 netmask 0xffffffff
        inet 62.234.20.117 --> 255.255.255.255 netmask 0xffffffff
        inet 62.234.20.196 --> 255.255.255.255 netmask 0xffffffff
        inet 62.234.20.23 --> 255.255.255.255 netmask 0xffffffff
        inet 62.234.20.51 --> 255.255.255.255 netmask 0xffffffff
        [...]
        inet 62.234.25.227 --> 62.234.24.1 netmask 0xff000000

% ifconfig tun0 | wc -l
     249

This is a fun sight, ofcourse, and it does not seem to harm the connection
itself because I will never try to connect to one of the old IP addresses
anyway, but I have to restart ppp to get rid of the lot of addresses.

My configuration is pretty straightforward from the handbook. Am I making
a common mistake?

Thanks!
w.

----------------- from /etc/rc.conf

[...]
ifconfig_ed0="up" # pppoe interface, only needs to be up
ppp_enable="YES"
ppp_mode="ddial" # dedicated + redial if dropped
ppp_profile="wanadoo"
ppp_nat="YES"
[...]

----------------- /etc/ppp/ppp.conf

default:
  set log Phase tun command
  set ifaddr 10.0.0.1/0 10.0.0.2/0

wanadoo:
  set device PPPoE:ed0:wanadoo
  set authname myname@wanadoo
  set authkey mykey
  set dial
  set login
  add default HISADDR
  nat enable yes

-- 
 Walter Hop <walter@binity.com>
 Updated contact information: http://www.binity.com/~walter/


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