IP Aliases,SSL and add New IP Address

[sclayton]

Can someone explain to me what "Add New IP Address" is supposed to do in the "IP Functions" section of WHM?

I think it should setup ip aliases, i.e. eth0:0, the reason I ask is because I set one up and both my primary IP address and the new ip address where accessible from the internet, but after a reboot the new ip address was gone and I could not see it when issuing the ifconfig command from ssh. I manually recreated /etc/sysconfig/network-scripts/eth0:0 and all was ok again, should cPanel create this script for me?

The other part of my question relates to SSL, do I need an IP address for every domain that requires an SSL certificate or if I am using shared ip address within cPanel can I just use the primary ip address?

thanks

[chirpy]

You should not create the virtual interface manually and you'll need to delete it to get things working again.

When you add a new IP address it should create it in /etc/ips on reboot the /etc/init.d/ipaliases script reads that file and create the virtual interfaces. If that's not happening, then you could add the running of that script to /etc/rc.d/rc.local for good measure.

Yes, you must have a unique IP address for every domain that wants an SSL certificate.

[sclayton]

Hi, thanks for getting back, I found errors during boot referering to trying to setup my secondary ip address, I traced this back to the /etc/init.d/ipaliases script. The start) part of the script was starting the alias at eth0:1 and Centos 4 expects it to start at eth0:0, therefore I had to alter the script as below:


# See how we were called.
case "$1" in
start)
defaultmask="255.255.255.0"
#dev=1 - get errors if start dev at 1, i.e. eth0:1, needs to start at eth0:0
dev=0
for ip in `cat /etc/ips`; do
broadcast=`echo $ip | awk -F: '{ print $3 }'`
netmask=`echo $ip | awk -F: '{ print $2 }'`
ip=`echo $ip | awk -F: '{ print $1 }'`
if [ "$netmask" = "" ]; then


was this the correct thing to do? Also I had to add the call to ipaliases to the /etc/rc.d/rc.local file as you suggested. Something else in the boot sequence must be disabling it.

regards

[chirpy]

Odd, I've seen plenty of CentOS 4 servers that haven't had that problem. Are you running CentOS v4.1 with all the latest updates?

If it works for you that is great, but a cPanel update is likely to overwrite your change to /etc/init.d/ipaliases, so you might want to consider logging the problem with cPanel in a ticket.

[sclayton]

yes, i'm running CentOS 4.1 i686, I think i'll raise a support ticket and see what they say.

thanks