Betr.: [CentOS] Multiple IP Addresses in a single NIC

Fri Jun 24 12:28:38 UTC 2005
Johnny Hughes <mailing-lists at hughesjr.com>

On Fri, 2005-06-24 at 13:19 +0100, Joao Medeiros wrote:
> I found what the problem is... I have Firestarter installed and If I turn it
> off I can access the web site with the ip alias. I wouldn't like to have to
> turn the firewall off. Any thoughts?
> 
> TIA,
> --JM
> 

I have never used firestarter ... but configure it to pass in port 80
from the new ip address :)


> -----Original Message-----
> From: centos-bounces at centos.org [mailto:centos-bounces at centos.org] On Behalf
> Of Alexander Dalloz
> Sent: 23 June 2005 23:56
> To: CentOS mailing list
> Subject: Re: Betr.: [CentOS] Multiple IP Addresses in a single NIC
> 
> Am Fr, den 24.06.2005 schrieb Thom van der Boon um 0:34:
> 
> > You need to issue two commands:
> > 
> > /sbin/ifconfig eth0:0 xxx.xxx.xxx.xxx
> > /sbin/route add -host xxx.xxx.xxx.xxx dev eth0
> > 
> > For example:
> > 
> > /sbin/ifconfig eth0:0 172.16.1.199
> > /sbin/route add -host 172.16.1.199 dev eth0
> 
> No route setting needed. The aliased device is anyway handled over the real
> device.
> 
> > You can even assign multiple aliases to one NIC (One of my servers has
> about 10 ip addresses):
> > 
> > For example:
> > 
> > /sbin/ifconfig eth0:0 172.16.1.199
> > /sbin/route add -host 172.16.1.199 dev eth0
> > 
> > /sbin/ifconfig eth0:1 172.16.1.198
> > /sbin/route add -host 172.16.1.198 dev eth0
> > 
> > /sbin/ifconfig eth0:2 172.16.1.197
> > /sbin/route add -host 172.16.1.197 dev eth0
> > 
> > and so on.....
> > 
> > You should write an startup script to execute these commands at boot time,
> because after a reboot the aliases are forgotten.
> 
> This isn't recommended this way. 
> 
> > Thom van der Boon
> 
> CentOS has native configuration ways to handle aliased devices. Either by
> running redhat-config-network (3.5) or system-config-network (4.1) and then
> choosing an aliased device or by hand: copying
> /etc/sysconfig/network-scripts/ifcfg-eth1 as ifcfg-eth1:0 ...
> ifcfg-eth1:1 ... and then changing the content of the ifcfg-eth0:X file
> regarding DEVICE name, IP data and HWADDR (MAC). A "service network restart"
> will bring up the new aliased device(s) together with the real ones.
> "ifconfig" shows eth0:X (X0number) and "ip addr ls" will show the additional
> IP(s) as part of the real device.
> 
> Alexander
> 
> 
> --
> Alexander Dalloz | Enger, Germany | GPG http://pgp.mit.edu 0xB366A773 legal
> statement: http://www.uni-x.org/legal.html Fedora Core 2 GNU/Linux on Athlon
> with kernel 2.6.11-1.27_FC2smp Serendipity 00:40:31 up 2 days, 8:54, load
> average: 0.44, 0.45, 0.35 
> 
> _______________________________________________
> CentOS mailing list
> CentOS at centos.org
> http://lists.centos.org/mailman/listinfo/centos
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 189 bytes
Desc: This is a digitally signed message part
URL: <http://lists.centos.org/pipermail/centos/attachments/20050624/6f1352ff/attachment-0005.sig>