[CentOS] 6.2 How to change hostname for each individual IP

[Markus Falb]

On 8.4.2012 10:59, Jonathan Vomacka wrote:
> On 4/8/2012 3:52 AM, John R Pierce wrote:
>> On 04/08/12 12:19 AM, Jonathan Vomacka wrote:
>>> I am referring to when binding one of the IP alias to an application.
>>> For example if I take any application installed on my server and tell it
>>> to connect to another source from a specific IP alias, or listen on a
>>> specific alias, there are issues with the hostname. When an external
>>> source does a lookup, it comes with the server's hostname instead of the
>>> hostname I want to show up for that specific IP. Do you know why this
>>> happens?
>>
>> the name of the host is constant, it doesn't change with the IP address
>> that a specific connection happens to be using.
>>
>> but, when you say, 'external source does a lookup', what /exactly/ do
>> you mean?
>>
> 
> One example is an IRC bouncer. I configured the app to bind to a 
> particular IP to listen on and to connect to the designated IRC servers 
> with. When I connect the hostname reflects the machine hostname rather 
> then the hostname I want to come up on the IP address.
> 
> Other applications seem to perform the same. Is it impossible to specify 
> hostnames for IP aliases. Perhaps hostname is the wrong terminology but 
> I figured RDNS and forward DNS would do the trick..

I think you are talking about the source ip used when your process is
doing a connect to the bad world outside. Process is listening on IPb
but when it does a connect IPa is used as source adress in the IP header.
?
-- 
Kind Regards, Markus Falb

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