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Date:      Sun, 28 Jul 2002 12:55:00 +0200
From:      Clement Laforet <sheep.killer@cultdeadsheep.org>
To:        Jacky Chen <jacky_chen@seed.net.tw>
Cc:        questions@freebsd.org
Subject:   Re: Three questions about FreeBSD
Message-ID:  <20020728125500.5adccc4b.sheep.killer@cultdeadsheep.org>
In-Reply-To: <3D43C5EC.3CD42180@seed.net.tw>
References:  <3D43C5EC.3CD42180@seed.net.tw>

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Hi Jacky,

> 1.
> When I select Security Profile with "Extreme" in Installation.
> The system will set sendmail_enable="NO" into /etc/rc.conf.
> But, after I restart the server, sendmail program is still be bring
> up. So, I saw the rc.conf man page & set the sendmail_enable="NONE",
> and resolve the problem.

Sendmail rc.conf settings have changed between 4.5-RELEASE and
4.6-RELEASE, (see /usr/src/UPDATING for more detail : 20020404) and
sysinstall seems to be out of date. 
 
> 2.
> I have two NICs but,  I can't set them into the same network with
> different IP.
> Example:
> 
> setting 1 is ok
> fxp0 :  ip 140.137.100.5, netmask 255.255.255.0, broadcast
> 140.137.100.255
> fxp1 :  ip 140.137.100.6, netmask 255.255.0.0, broadcast
> 140.137.100.255
> 
> setting 2 can't work
> fxp0 :  ip 140.137.100.5, netmask 255.255.255.0, broadcast
> 140.137.100.255
> fxp1 :  ip 140.137.100.6, netmask 255.255.255.0, broadcast
> 140.137.100.255
> 
> and when I try to set netmask into 255.255.255.0, system response
> that, ifconfig: ioctl (SIOCAIFADDR): File exists
> 
> NIC card are ntel Pro 10/100B/100+ Ethernet

You want to have 2 interfaces on the same LAN. FreeBSD complains
because it can't determine which interface to use to send packets
(netstat -nr to have the routes and which interface FreeBSD uses).
If you use 2 different netmasks you "fake" FreeBSD. 


> 3.
> When the server start, there are a lot of wrong messages
> "arp: 140.137.100.10 is on fxp0 but got reply from 00:80:c8:d8:6c:6a
> on fxp1"
> the 140.137.100.10 is my DNS IP
> 
That's one of problems you can have when you use 2 interfaces on the
same LAN. You receive ARP packets on the both interfaces, so the kernel
tells you a change in the ARP table.

If you want to use 2 or more interfaces with different IP addresses try
netgraph bounding, or FEC module (you have to download it at :
http://people.freebsd.org/~wpaul/FEC/4.x/) and then set aliases for the
new virtual interface.


clem

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