I think it's called IP aliasing or something like that. We have a single NIC
advertising a bunch of IP addresses, and have a different apache listener on
each one.
We do that via this command in a system startup script on Suse Linux.
"ip address add 192.168.69.60/24 brd + dev eth0 label eth0:60"
And then ifconfig to list the network addresses shows this:
lnx-dhttp:~ # ifconfig
eth0 Link encap:Ethernet HWaddr 02:00:03:00:00:05
inet addr:192.168.69.34 Bcast:161.250.69.255 Mask:255.255.255.0
inet6 addr: fe80::200:300:100:5/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1492 Metric:1
RX packets:51739450 errors:0 dropped:0 overruns:0 frame:0
TX packets:51033519 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:25357355357 (24182.6 Mb) TX bytes:28616518230 (27290.8 Mb)
eth0:60 Link encap:Ethernet HWaddr 02:00:03:00:00:05
inet addr:192.168.69.60 Bcast:161.250.69.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1492 Metric:1
eth0:61 Link encap:Ethernet HWaddr 02:00:03:00:00:05
inet addr:192.168.69.61 Bcast:161.250.69.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1492 Metric:1
eth0:62 Link encap:Ethernet HWaddr 02:00:03:00:00:05
inet addr:192.168.69.62 Bcast:161.250.69.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1492 Metric:1
eth0:63 Link encap:Ethernet HWaddr 02:00:03:00:00:05
inet addr:192.168.69.63 Bcast:161.250.69.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1492 Metric:1
eth0:64 Link encap:Ethernet HWaddr 02:00:03:00:00:05
inet addr:192.168.69.64 Bcast:161.250.69.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1492 Metric:1
And then start all the different apache's with something like this:
/opt/local/HTTPServer/bin/apachectl -f conf/httpd.eth061.conf -k start -D eth061
/opt/local/HTTPServer/bin/apachectl -f conf/httpd.eth062.conf -k start -D eth062
/opt/local/HTTPServer/bin/apachectl -f conf/httpd.eth063.conf -k start -D eth063
/opt/local/HTTPServer/bin/apachectl -f conf/httpd.eth064.conf -k start -D eth064
And I'm reasonably sure when I created the certificates for these, I added the
various IP addresses & DNS hostnames for them to the extension aliases field,
and one certificate covered all of them.
Jon Veencamp
-----Original Message-----
From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of Marcy
Cortes
Sent: Friday, November 29, 2013 12:38 PM
To: LINUX-390@VM.MARIST.EDU
Subject: Re: Thoughts on multiple certificates for Apache host
Martha wrote:
> For example, could we host multiple IPs from the same NIC if the
> server is on a layer 2 vswitch? (Will it do trunking, basically?) Is
> there an easier way to approach this?
If you haven't already figured this out (and hopefully you've been off eating
turkey and pumpkin pie instead of having to configure IP addresses...)
This is very simple with yast2 on SuSE.
Just go into Yast2
Click Network Devices
Select the current one and click Edit
Go down to the "Additional Addresses" section
Click Add
Name it (vip0 or whatever you'd like)
put in the IP and Netmask
Et voila! Immediately usable and visible in "ifconfig".
(It basically just adds a couple of lines to the eth0 device (or whatever
device yours is called) in /etc/sysconfig/network and does whatever is needed
to dynamically activate it.
Marcy
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