Re: 2 IP addresses in RH9

[Rick Stevens <rstevens vitalstream com>]

Shawn McPike wrote:
> 1)  I just recently set up RH9.
> 2)  I have an external router/firewall that handles
> one-to-one NAT on my external IP addresses (i.e.
> EXTERNALIP1 --> 192.168.254.10 and EXTERNALIP2 -->
> 192.168.254.11).
> 3)  Both external IPs are registered domain names that
> I own (domainname.com)
> 4)  OK - here's the question... both of the mentioned
> internal IPs need to point to my linux machine.  I
> have 1 configured so far and here is the ifconfig for
> my single NIC:
>
> eth0    Link encap:Ethernet  HWaddr 00:04:5A:64:62:51 
>
>           inet addr:192.168.254.10 
> Bcast:192.168.254.255  Mask:255.255.255.0
>           UP BROADCAST RUNNING MULTICAST  MTU:1500 
> Metric:1
>           RX packets:13212 errors:0 dropped:0
> overruns:0 frame:0
>           TX packets:10375 errors:0 dropped:0
> overruns:0 carrier:0
>           collisions:0 txqueuelen:100 
>           RX bytes:12378958 (11.8 Mb)  TX
> bytes:2735929 (2.6 Mb)
>           Interrupt:11 Base address:0x4000 
>
> 5)  not sure if this helps, but here is my IP routing
> table.
>
> Destination     Gateway         Genmask         Flags 
>  MSS Window  irtt Iface
> 192.168.254.0   0.0.0.0         255.255.255.0   U     
>    0 0          0 eth0
> 169.254.0.0     0.0.0.0         255.255.0.0     U     
>    0 0          0 eth0
> 127.0.0.0       0.0.0.0         255.0.0.0       U     
>    0 0          0 lo
> 0.0.0.0         192.168.254.254 0.0.0.0         UG    
>    0 0          0 eth0
>
> 6)  So (A) how do I set up 192.168.254.11 on the same
> NIC??

"cd" to /etc/sysconfig/network-scripts and copy the file "ifcfg-eth0"
to "ifcfg-eth0:1".  Edit the second file and change the "DEVICE=" bit
to read "eth0:1" and the "IPADDR=" to match your second IP address.
An "/etc/rc.d/init.d/network restart" should get it all going.

> 7) And (B) I get messages on FQDN's not being
> configured: i.e when I start Apache:
>
> Starting httpd: httpd: Could not determine the
> server's fully qualified domain name, using 127.0.0.1
> for ServerName

Make sure the IP address and FQDN for the machine are in your /etc/hosts
file since you won't be able to reverse DNS the 192.168.x.y addresses.
----------------------------------------------------------------------
- Rick Stevens, Senior Systems Engineer     rstevens vitalstream com -
- VitalStream, Inc.                       http://www.vitalstream.com -
-                                                                    -
-        Change is inevitable, except from a vending machine.        -
----------------------------------------------------------------------