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Date:      Wed, 1 Mar 2000 08:39:26 -0500 (EST)
From:      Steve Hovey <shovey@buffnet.net>
To:        Yves Berthiaume <yves@radicaux-libres.qc.ca>
Cc:        freebsd-questions@FreeBSD.ORG
Subject:   Re: Problem with IP aliasing
Message-ID:  <Pine.BSF.4.05.10003010838500.25936-100000@buffnet11.buffnet.net>
In-Reply-To: <v02130507b4e2298c5eef@[192.168.0.3]>

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The alias mask - since its on the same subnet as the primary IP needs to
be 255.255.255.255

On Tue, 29 Feb 2000, Yves Berthiaume wrote:

> Hi all
> 
> I've searched the mail archive but could'nt find exactly what I needed.
> 
> Here it goes:
> 
> System config:
>          FreeBSD 3.3-STABLE
>          2 networks cards :3COM XL EtherExpress 905b
>          NATD for firewall(simple)
>          Stronghold web server
> 
> 
> I've got *some* Linux experience, but very little with FreeBSD.
> 
> I've been trying to ad an IP address to my external card. So I cant use
> that IP for a Virtual Host on Stronghold. Here's the exact syntax used in
> rc.conf for both cards:
> 
> ifconfig_xl0="inet 192.168.1.1  netmask 255.255.255.0"
> ifconfig_xl1="inet 207.236.242.12 netmask 255.255.255.240"
> ifconfig_xl1_alias0="inet 207.236.242.5 netmask 0xffffffff0"
> 
> It seem to be ok, when I do "ifconfig xl1" I get:
> 
> xl1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
>         inet 207.236.242.12 netmask 0xfffffff0 broadcast 207.236.242.15
>         inet 207.236.242.5 netmask 0xfffffff0 broadcast 207.236.242.15
>         ether 00:50:04:e1:a2:1e
>         media: 100baseTX <half-duplex>
>         supported media: autoselect 100baseTX <full-duplex> 100baseTX
> <half-duplex> 100baseTX
>         10baseT/UTP <full-duplex> 10baseT/UTP <half-duplex> 10baseT/UTP
> 
> When i do a "netstat -rn -finet" I get:
> 
> Routing tables
> 
> Internet:
> Destination        Gateway            Flags     Refs     Use     Netif Expire
> default            207.236.242.1      UGSc        6    43242      xl1
> 127.0.0.1       127.0.0.1              UH          0        0      lo0
> 192.168.1          link#1               UC          0        0      xl0
> 192.168.1.22       0:60:97:b5:97:30   UHLW        1      224      xl0    971
> 207.236.242/28     link#2             UC          0        0      xl1
> 207.236.242.1      0:10:7b:b3:cf:5b   UHLW        7        0      xl1    183
> 207.236.242.8      0:50:e4:90:87:48   UHLW        0      430      xl1   1073
> 207.236.242.12     0:50:4:e1:a2:1e    UHLW        0       20      lo0
> 
> But this is the first time I'm looking at routing tables....
> 
> When I ping the IP's locally I get no answer from my alias IP. But I do get
> one when I ping it from inside my network. Which makes me think that it may
> be a NATD problem. Do I have to declare my IP alias?
> If so what is the syntax?
> 
> Here's a snipet from my rc.firewall
> 
>         oif="xl1"
>         onet="207.236.242.0"
>         omask="255.255.255.240"
>         oip="207.236.242.12"
> 
> 
> 
> 
> 
> _______________________________________________
> Radicaux Libres                                   Solutions technologiques
> Yves Berthiaume                                            4644 Parthenais
> T:514.529.0989                                           Montreal, Quebec
> F:514.529.4633                                                     H2H 2G7
> 
> 
> 
> 
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