Hi,

I am new in linux, I have a server with centos 5 and plesk 9 and I have buy an additional IP address for my server, when i create it in plesk, there is no problem, all its ok I can assign it to a new domain, but the ip only responds ping, none of other services as http, ssh or smtp.

I paste here the configuration of files

ifcfg-eth0

device=eth0
bootproto=dhcp
type=ethernet
onboot=yes

ifcfg-eth0:1

device="eth0:1"
ipaddr="***.***.***.51"
netmask="255.255.255.255"

Asterisk for security
I have stopped IPTABLES service and nothing happens.
What is i have making wrong?

I tried put eth0 as static, but all fails and I have to reinstall the image of the server.

Thanks for advance

Because when you do ping, you ask INTERFACE to respond.

HTTP, SSH, MAIL - services=programs, which, I really sure, was configured to listen interface ETH0, and they do it diligently.

And how to configure it.

httpd.conf is set to listen on port 80, any IP
The same for ssh.conf.

What i have to change???

Do you have any firewall, which filters incoming IP?

No I quit iptables, but all is the same

Can you execute command:
ifconfig
Will be interface eth0:1 in the output?

Yes it appears in the output, this is the output

eth0 Link encap:Ethernet HWaddr 00:16:3E:30:81:5D
inet addr:***.***.53.78 Bcast:***.***.53.78 Mask:255.255.255.255
inet6 addr: fe80::216:3eff:fe30:815d/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1312916 errors:0 dropped:115 overruns:0 frame:0
TX packets:1660032 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:489880666 (467.1 MiB) TX bytes:1789681205 (1.6 GiB)
Interrupt:185 Base address:0x2000

eth0:1 Link encap:Ethernet HWaddr 00:16:3E:30:81:5D
inet addr:***.***.134.51 Bcast:***.***.134.51 Mask:255.255.255.255
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
Interrupt:185 Base address:0x2000

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:18209 errors:0 dropped:0 overruns:0 frame:0
TX packets:18209 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:4525001 (4.3 MiB) TX bytes:4525001 (4.3 MiB)

Ok, if interface is UP and you can ping it, can you set ssh to listen this IP?

I have just set sshd configuration file to listen all IPS and all is the same

I can suggest to do next test, if you wish. Enable iptables, and set default policies for INPUT and OUTPUT chains to ALLOW. Then add follow rule to NAT table:
This should send something you want from the second public IP to the first.

Did you restart after configuration? You can cause the running sshd process to reread the configuration file by sending it the SIGHUP signal ... kill -HUP <processID>

Perhaps you need to use DHCP for both addresses, it's not uncommon for switches/routers to be set up like that to prevent ARP spoofing.

Try using tcpdump to see what's happening.

Can you post:
A web server?