Re: trying to restrict exim smtp to specific IP

[Adam Hardy <adam.ant@cyberspaceroad.com>]

Andrei Popescu on 21/01/10 17:54, wrote:
> On Wed,20.Jan.10, 23:58:35, Adam Hardy wrote:
>  
> > Not allowed to do that - apparently it would foobar the local
> > network where the host server of my vserver sits. I've got to use
> > the public IP address if I configure this, but I'd feel happier if I
> > didn't have to listen on port 25 at all. I don't want any incoming
> > mail - I just want to send.
>
> Unless I'm terribly mistaken (please point me to respective 
> documentation, because I would want to close that gap) there is no way a 
> server listening only to 127.0.0.1 is accessible or even seen from 
> "outside" the same computer. That is the whole point of it!
>
> Maybe your hosting provider only wants to make sure you are not 
> listening to other *external* IPs?

This is a virtual server on a hosting system with many others - and that's what 
the sysop said:

>>>>> No - please do not touch those at all, your vserver will stop working if 
you do.
>>>>>
>>>>> They are the internal IP address of the vserver.  The data centre LAN is 
NAT'd.
>>>>>
>>>>> 10.153.118.230 internally equates directly to 205.153.118.230 externally.
>>>>>
>>>>> All services in your vserver *must* be bound to the 10.153.118.230 IP 
address.
>>>>>
>>>>> *Very important:*
>>>>>  *Never allow anything to bind to localhost or 127.0.0.1.*
>>>>>